ISO 8157:2022 肥料、土壌改良剤、および有益な物質 — 用語、語彙 | ページ 5

3.1.1

fertilizer

substance containing one or more recognized plant nutrient(s), designed for use or claimed to have value in promoting plant growth

3.1.2

plant nutrient

substance that is essential or beneficial for plant growth

3.1.3

fertilizer nutrient

plant nutrient applied in the course of fertilization

Note 1 to entry: Some countries or regions declare nutrients in their oxide forms (e.g. CaO) but also in their elementary forms.

3.1.3.1

primary nutrient element

elements nitrogen, phosphorus and potassium only

Note 1 to entry: A macronutrient is also used. These include the following plant food: nitrogen (N), available phosphate (P₂O₅) and soluble potash (K₂O).

3.1.3.2

secondary nutrient element

elements calcium, magnesium and sulfur

Note 1 to entry: Sodium (Na) and Silicon (Si) have been supported as beneficial for certain plants.

3.1.3.3

micronutrient

element such as boron, manganese, iron, zinc, copper, molybdenum, cobalt, nickel and chloride, which are essential, in relatively small quantities, for plant growth

Note 1 to entry: Cobalt is essential in relatively small quantities, for some species.

3.1.4

beneficial substance

beneficial element

substance, element or microorganism other than primary nutrient element (3.1.3.1) , secondary nutrient element (3.1.3.2) or micronutrients (3.1.3.3) that can be demonstrated by scientific research to be beneficial to one or more species of plants or biological components of the soil ecosystem, when applied exogenously

3.1.4.1

plant biostimulant

product that contains substance(s), microorganism(s), or mixtures thereof, that, when applied to seeds, plants, the rhizosphere, soil or other growth media, act to support a plant's natural nutrition processes independently of the biostimulant's nutrient content

Note 1 to entry: The plant biostimulant thereby improves nutrient availability, uptake or use efficiency, tolerance to abiotic stress, availability of confined nutrients in the soil or rhizosphere, and consequent growth, development, quality or yield.

3.1.4.2

beneficial plant nutrient

elements, other than those defined as primary nutrient element (3.1.3.1) , secondary nutrient element (3.1.3.2) or micronutrients (3.1.3.3) , that are known to be needed for plant growth and development or for the quality attributes of the plant product, of a given plant species, grown in its natural or cultivated environment

Note 1 to entry: These beneficial plant nutrients are not known to be generally essential and their beneficial functions can be limited to particular taxa, plant growth stage or product end use.

Note 2 to entry: Known beneficial nutrient elements include Si, Se, I, Co, Na, Al, and others as demonstrated.

3.1.5

inorganic fertilizer

fertilizer without organic material other than those defined as additives

Note 1 to entry: Calcium cyanamide, urea and its condensation products and chelated and complex micro-nutrients are, by convention, recognized as inorganic fertilizers.

3.1.6

organic fertilizer

material containing carbon or one or more elements other than hydrogen and oxygen mainly of plant and/or animal origin added either directly to the plant or to the soil

3.1.7

organic nitrogenous fertilizer

materials of biological origin in which the declarable nitrogen content is bonded directly to carbon and which can contain other elements, but which do not have declarable phosphorus or potassium contents

3.1.8

synthetic nitrogenous fertilizer

nitrogenous fertilizers in which the nitrogen is combined with carbon by organic synthesis

3.1.9

organo-mineral fertilizer

semi-organic fertilizer

product in which declared nutrients are of both organic and inorganic origin obtained by either mixing or chemical combination, or both, of organic and inorganic fertilizers

3.1.10

organo-mineral compound fertilizer

organic-inorganic compound fertilizer

compound fertilizer containing an amount of organic fertilizer

3.1.11

slow release fertilizer

fertilizer whose nutrient availability is spread over a period of time, by hydrolysis and/or by biodegradation and/or by limited solubility, or any other recognized mechanism, when compared to a ''reference soluble'' product such as ammonium sulfate, ammonium nitrate and urea

3.1.12

controlled-release fertilizer

fertilizer in which nutrient release is controlled, meeting the stated release rate of nutrient and the stated release time at a specified temperature

Note 1 to entry: Typical examples are coated fertilizers, such as polymer coated fertilizer, PSCU.

3.1.13

partly slow release fertilizer

fertilizer obtained by blending a slow release fertilizer with a rapidly available fertilizer

3.1.14

partly controlled release fertilizer

fertilizer obtained by blending a controlled release fertilizer with a rapidly available fertilizer

3.1.15

coated fertilizer

fertilizer, of which the granules are covered with a thin layer of a different material (polymer, sulfur, or other material) in order to improve the behaviour or modify the characteristics of the fertilizer

3.1.16

stabilized fertilizer

fertilizer product that has been amended with an additive that reduces, in comparison with its un-amended form, the rate of transformation of the nutrient(s), extending the time of nutrient(s) availability to the plant by a variety of mechanisms

Note 1 to entry: Usually referred to as nitrogen-stabilized fertilizer.

3.1.16.1

inhibitor

substance that improves the nutrient release patterns of a product providing plants with nutrients, by delaying or stopping the activity of specific group of microorganisms or enzymes

3.1.16.2

urease inhibitor

substance that inhibits hydrolytic action on urea by the urease enzyme

Note 1 to entry: Primarily targeted to reduce ammonia volatilization.

3.1.16.3

nitrification inhibitor

substance that inhibits the biological oxidation of ammoniacal nitrogen to nitrite nitrogen, thus slowing the formation of nitrate nitrogen

3.1.17

enhanced efficiency reference product

soluble fertilizer product (prior to treatment by chemical reaction, coating, encapsulation, addition of inhibitors, compaction, occlusion, or by other means) or the corresponding product used for comparison to substantiate enhanced efficiency claims

3.1.18

soil conditioner

organic/inorganic material added to soils to improve the physical and/or chemical properties, and/or the biological activity of soils with or without a declarable content of nutrients

3.1.19

synthetic soil conditioner

product made by organic synthesis added to the soil to improve the physical and/or chemical properties, and/or the biological activity of soils without a declarable content of nutrients

3.1.20

inorganic soil conditioner

soil conditioner without organic matter, which improves the physical and/or chemical properties, and/or the biological activity of soils.

3.1.20.1

phosphogypsum

product produced as a by-product from the wet phosphoric acid process

Note 1 to entry: It is primarily composed of calcium sulfate and containing phosphate some of which is available. It is used as an ameliorant for chemical soil reclamation, calcium-containing fertilizer and raw material for composting.

Note 2 to entry: In this process, phosphate rock powder is reacted with concentrated sulfuric acid.

3.1.21

soil improver

organic/inorganic material that maintains, improves, or protects the physical or chemical properties, the structure or the biological activity of the soil to which it is added with the exception of liming materials

Note 1 to entry: The term “soil amendment” is synonymous with “soil conditioner” under some circumstances.

3.1.22

liming material

mineral substances and mixtures whose main function is to correct soil acidity and modify and/or improve soil physical, chemical or biological properties and contain either oxides, hydroxides, carbonates or silicates of the nutrients calcium and/or magnesium

Note 1 to entry: The terms “lime” and “liming soil amendment” are also used, but"liming material" or “agricultural lime” are preferred.

3.1.23

organic soil improver

natural organic material applied principally to improve the physical properties and biological activity of soil

3.1.24

semi-organic soil improver

soil improver containing substances and elements of both organic and inorganic origin

3.1.25

water-soluble fertilizer

fertilizers, virtually completely soluble in water and suitable for, for example, fertigation and sprinkling irrigation

3.1.25.1

water-soluble nutrient

nutrient completely soluble in water

3.1.26

foliar fertilizer

fertilizer designed for application to, and nutrient uptake by, the foliage of a plant

3.1.27

chelated fertilizer

fertilizer in which one or more nutrients are bonded by chelating agents

3.1.27.1

chelated plant nutrient

product of a chemical reaction between a metal cation that is recognized as a plant nutrient and a chelating agent

3.1.27.2

chelate

molecular entity in which exists the presence of bonds (or attractive interactions) between two or more separate binding sites within the same organic ligand and a single central atom of a metal forming a five- or six- membered ring

3.1.27.3

chelating agent

organic molecule having two or more sites that donate electron pairs to a central metal cation and is large enough to form a five- or six- membered ring structure

3.1.27.4

coordinating complex

molecular entity in which exists the presence of bonds (or attractive interactions) between two or more components of organic molecular entities and one central metallic atom

Note 1 to entry: When this metal complex is formed because the interaction of two or more separate binding sites within the same organic ligand and a single central atom forming a five-or six- membered ring, then it becomes a chelate.

3.1.27.5

coordinating agent

sequestering agent

organic molecule that has two or more sites that donate electron pairs to a central metal cation, which form a product of sufficient stability with the cation that does not undergo many free metal typical reactions, for example, precipitation in basic solution

3.1.28

soil fertility

ability of a soil to support and ensure plant growth

3.1.29

fertilization

any or all aspects of the use of fertilizers and soil conditioners/improvers to improve crop growth and soil fertility and structure

Note 1 to entry: The English term “fertilization” has a more restricted meaning than the French term “fertilisation” which covers all the techniques of management of fertilizers and soil conditioners.

3.1.30

application

process of administering fertilizers, beneficial substances, liming materials and soil improvers to crop, rhizosphere, soil or all of them

Note 1 to entry: This term embraces broadcasting, drench application, drip irrigation, hydroponics, post-harvest application, pre-planting seedling immersion, root application, seed treatment, soil/substrates/growing media application, spreading, spraying or dusting, as well as more specific placement methods including injection into the soil and the combined drilling of seed and fertilizer. It includes nutrient film techniques, foliar application, and the addition of fertilizers to irrigation water (fertigation).

3.1.31

fertigation

application of fertilizer dissolved in irrigation water

3.1.32

dose rate

dose

mass or volume of fertilizer, beneficial substances, or soil conditioner or nutrient applied per unit area of cultivated land or unit mass of growth medium

3.1.33

solubility of a fertilizer nutrient

mass or volume of a given nutrient which is extracted by a specific medium under specified conditions

Note 1 to entry: Expressed as a percentage by mass or volume of the fertilizer.

3.1.34

solubility of a fertilizer

mass of a fertilizer that dissolves in a given volume of water at a given temperature (such as kg/m³ at 298 K)

3.1.35

fertilizer unit

unit mass of a fertilizer nutrient (in the form of the element or an oxide), generally 1 kg

3.1.36

total primary nutrient

sum of total nitrogen, available phosphorus (P₂O₅) and water-soluble potash (K₂O) content, expressed as mass fraction in per cent

3.1.37

primary nutrient formula

respective content of the total primary nutrient in a compound fertilizer expressed by numbers, in the order of N-P₂O₅-K₂O, used in some countries

Note 1 to entry: In some countries and regions, mass fraction expressed as a percentage of element or oxide, in the order of nitrogen: phosphorus: potassium: secondary nutrients and micro-nutrients, of the respective content of these nutrients in a compound fertilizer.

Note 2 to entry: A zero can be used to indicate the absence of an element.

3.1.38

declarable content

content of an element (or an oxide) which can be given on a label or document associated with fertilizer or soil conditioner

3.1.39

declaration

statement of the nutrient content or other information

3.1.40

marking

statement, symbol, logo, picture, and/or information, that is present on the label or package

3.1.41

tolerance

permitted deviation of the measured value of a nutrient content from its declared value

Note 1 to entry: The term"investigational allowance" is also used in some countries and regions.

3.1.42

guarantee

guarantee of composition

either quantitative or qualitative, or both, characteristics with which a marketed product conforms to contractual or legal regulations

3.1.43

nutrient ratio

ratio by mass of the primary nutrients in the fertilizer, expressed in the form of the element or an oxide, in the order of nitrogen, phosphorus and potassium

Note 1 to entry: The ratio can be based on nitrogen as unity or on the nutrient with the lowest proportion.

3.1.44

granular fertilizer

solid fertilizer material in the form of particles of a predetermined size and expressed in SGN, D50, and UI, size range, or other specific methods

3.1.45

granulation

technique using processes such as agglomeration, crushing into finer particles, accretion or compaction, to make a granular fertilizer

3.1.46

grain size

dimension which corresponds to the smallest sieve aperture size through which a particle will pass if presented in the most favourable attitude

3.1.47

prill

granule obtained by solidification of droplets of fertilizers or by crystallization under special conditions

3.1.48

powder

solid substance in the form of very fine particles

3.1.49

powdered fertilizer

fertilizer in the form of fine particles, formed by precipitation, crystallization or grinding of larger particles

3.1.50

liquid fertilizer

fertilizers in suspension or solution

Note 1 to entry: This term is also used for liquefied ammonia.

3.1.51

solution fertilizer

liquid fertilizer free of solid particles

3.1.52

suspension fertilizer

two-phase fertilizer in which solid particles are maintained in suspension in the liquid phase

3.1.53

additive agent

substance added to fertilizer materials to provide bulk, prevent caking, or serve some purpose other than providing essential plant nutrients

3.1.54

filler

substance added to fertilizer materials to provide bulk other than providing essential plant nutrients

3.1.55

container

closed receptacle directly in contact with a fertilizer, beneficial substance or soil conditioner whereby the fertilizer, beneficial substance or soil conditioner can be transported or stored in unit quantities

3.1.56

packaging

product to be used for the containment, protection, handling, delivery, storage, transport and presentation of goods, from raw material to processed goods, from the producer to user or consumer, including processor, assembler or other intermediary

3.1.57

package

packaging (3.1.56) and its contents

3.1.58

big bag

flexible container, holding 250 kg to 1 500 kg

3.1.59

label

piece of paper or plastic, or a printed area of a package or container, marked with the necessary information to identify the product and make known its essential characteristics

3.1.60

bulk

product distributed in a non-packaged form

3.1.61

availability

extent to which fertilizer nutrients can be taken up by plants

3.1.62

non-nutritive trace element

element above critical levels which is harmful to either ecological systems or human health, or both

Note 1 to entry: In some countries, historically, a non-nutritive trace element is also referred to as a heavy metal.

Note 2 to entry: F⁻, Cl⁻ (only for sensitive plants, such as tobacco, orange), Br⁻, I⁻no₂⁻, SCN⁻ can also be referred to as non-nutritive trace elements.

Note 3 to entry: Cl⁻ is essential for all plants in some countries. It is the amount of chloride that makes it considered as harmful in some countries.

3.2.1.1

aqueous ammonia

solution containing water and ammonia in any proportion

Note 1 to entry: This is usually qualified by a reference to nitrogen content.

3.2.1.2

calcium nitrate

chemically obtained product containing calcium nitrate as its essential ingredient

3.2.1.3

calcium ammonium nitrate

nitrogen fertilizer consisting of a hydrated double salt of calcium nitrate and ammonium nitrate with water of crystallization, with the chemical formula of 5Ca(NO₃)₂.NH₄no₃.10H₂O

3.2.1.4

calcium cyanamide

chemically obtained product containing calcium cyanamide as its essential ingredient

3.2.1.5

ammonium sulfate

sulfate of ammonia

chemically obtained product containing ammonium sulfate as its essential ingredient

3.2.1.6

ammonium chloride

chemically obtained product containing ammonium chloride as its essential ingredient

3.2.1.7

ammonium sulfated nitrate

chemically obtained product containing ammonium nitrate and ammonium sulfate as its essential ingredient

3.2.1.8

ammonium nitrate

chemically obtained product containing ammonium nitrate as its essential ingredient, which can contain fillers such as ground limestone, calcium sulfate, ground dolomite, magnesium sulfate and kieserite

3.2.1.9

urea

white crystalline, or granular, solid synthesized from ammonia and carbon dioxide by a number of processes

3.2.1.10

urea ammonium nitrate fertilizer solution

UAN

solution of urea and ammonium nitrate in water used as a fertilizer

3.2.1.11

urea-ammonium mixed nitrogen fertilizer

solid straight nitrogen fertilizers, containing ureic nitrogen and ammoniacal nitrogen only

3.2.1.12

sulfur coated urea

SCU

coated controlled release fertilizer consisting of urea particles coated with sulfur

Note 1 to entry: The product is usually further coated with a sealant and, if necessary, a conditioner to avoid tackiness from the sealant.

3.2.1.13

polymer

chemical compound or mixture of compounds consisting of repeating structural units created through polymerization

3.2.1.14

polymer coated urea

PCU

coated controlled-release fertilizer consisting of urea particles coated with a polymer

Note 1 to entry: It is a source of controlled release nitrogen.

3.2.1.15

polymer sulfur coated urea

PSCU

coated slow release fertilizer consisting of urea particles coated with a polymer and sulfur

3.2.1.16

ammonium thiosulfate

nitrogen fertilizer chemically obtained product containing ammonium thiosulfate [(NH₄)₂S₂O₃]

3.2.2.1

single superphosphate

product obtained by reaction of ground mineral phosphate (< 1 % of organic carbon) with sulfuric acid and containing monocalcium phosphate as an essential ingredient, as well as calcium sulfate

3.2.2.2

dicalcium phosphate

product obtained by precipitation of solubilized phosphoric acid from mineral phosphates or bones and containing dicalcium phosphate dihydrate as its essential ingredient

3.2.2.3

triple superphosphate

product obtained by reaction of ground mineral phosphate (< 1 % of organic carbon) with phosphoric acid and containing monocalcium phosphate as its essential ingredient

3.2.2.4

fused calcium-magnesium phosphate

fused calcium-magnesium phosphate fertilizer

vitreous aluminosilicate containing phosphate, which is formed by phosphate rock and rock containing magnesium and silicon through hot melting, quenching, drying and grinding in a blast or electric furnace

3.2.3.1

potassium magnesium sulfate

sulfate of potash magnesia

potassium salt containing water-soluble potash principally as sulfates and sulfate of magnesium

Note 1 to entry: Typically, a naturally occurring soluble mineral that is a double salt of potassium sulfate and magnesium sulfate.

3.2.3.2

potassium chloride

muriate of potash

product obtained from crude potassium salts or brines containing potassium chloride as its essential ingredient

3.2.3.3

potassium sulfate

sulfate of potash

product obtained chemically from sulfuric acid, sulfates and potassium salts or from naturally occurring minerals containing potassium sulfate as its essential ingredient

3.2.3.4

potassium thiosulfate

chemically obtained product containing potassium thiosulfate [K₂S₂O₃]

3.2.4.1

monoammonium phosphate

MAP

product composed of ammonium phosphates, principally monoammonium phosphate, resulting from the ammoniation of phosphoric acid

3.2.4.2

diammonium phosphate

DAP

product composed of ammonium phosphates, principally diammonium phosphate, resulting from the ammoniation of phosphoric acid

3.2.4.3

nitrophosphates

compound fertilizer derived from the digestion of phosphate rock with nitric acid

3.2.5.1

potassium nitrate

nitrate of potash

product obtained chemically or naturally from nitric acid, nitrates and potassium chloride

3.2.6.1

monopotassium phosphate

monopotassium salt of phosphoric acid

3.2.6.2

dipotassium phosphate

dipotassium salt of phosphoric acid

3.2.7.1

compound fertilizer

fertilizer that has a declarable content of at least two of the primary plant nutrients (nitrogen, phosphorus and potassium), obtained either chemically or by blending, or both, including NP, NK, PK and NPK products

3.2.7.2

complex fertilizer

compound fertilizer, obtained by chemical reaction, having a declarable content of at least two of the primary nutrients, including NP, NK, PK and NPK products

3.2.7.3

blend fertilizer

fertilizer obtained by dry or liquid mixing of several components, with no chemical reaction

3.2.7.4

bulk blend

blended fertilizer transported or supplied in bulk

3.2.7.5

potassium nitrophosphate

fertilizer obtained by adding potassium salt after the reaction of ground mineral phosphate with nitric acid

3.2.8.1

ash

mineral residue remaining after the destruction of organic material by burning

Note 1 to entry: Such residues may be used as fertilizers, for example plant ash and animal ash, containing mainly potassium salts and phosphates.

3.2.8.2

blood

dried blood

blood meal

blood which has been dried and to which no other material has been added

3.2.8.3

bone

hard tissue forming the skeletal structure of animals and containing salts of calcium, chiefly phosphate and carbonate

3.2.8.4

bone meal

degreased bone which can be degelatinized and has been ground or crushed to pass a sieve of specified aperture size

3.2.8.5

clay

group of hydrated aluminium silicates of microcrystalline structure

Note 1 to entry: It is most often in parallel plates.

Note 2 to entry: This group of minerals has colloidal properties.

3.2.8.6

compost

material obtained by decomposition of a mixture consisting principally of various vegetable residues, occasionally with organic materials of animal origin, and having a limited mineral content

3.2.8.7

dung

semi-solid excrements of animals used as fertilizers and/or soil conditioners

3.2.8.8

fish hydrolysate

material consisting essentially of fresh by-products of the fishing industry and produced by chemical or enzymatic hydrolysis

3.2.8.9

fish guano

fish compost

material consisting essentially of fresh by-products of the fishing industry and produced by grinding and composting

3.2.8.10

fish-meal

product obtained by drying and grinding, or otherwise treating, fish or fish waste and to which no addition has been made

3.2.8.11

growing medium

material, other than soils in situ, in which plants are grown

3.2.8.12

bat guano

bird guano

excrements and remains of any bats or birds, except poultry, containing nitrogen, phosphorus and potassium, and to which no addition has been made

3.2.8.13

humus

material that is derived primarily from the decomposition of plant and animal matter in such manner that origin of the material is not recognizable

3.2.8.14

humic acids

alkali extracted humic substances that are insoluble in strongly acidic solution and that precipitate from the alkali extract in acid solutions of pH 1

3.2.8.15

humic substance

major organic constituent of natural organic matter consisting of complex heterogeneous mixtures of carbon-based substances formed by biochemical reactions during the decay and transformation of plant and microbial remains

3.2.8.16

fulvic fraction

alkali extracted fractions of humic substances, which are soluble in both alkali and acid aqueous solution

3.2.8.17

liquid animal waste from abattoir

liquid that could contain blood

Note 1 to entry: As opposed to slurry (3.2.8.24) and liquid manure (3.2.8.18) which do not contain blood.

3.2.8.18

liquid manure

liquid arising from animal urine and litter fluids or from a dung heap

3.2.8.19

manure

mixture of litter and dung in process of biological change

3.2.8.20

marl

soft, natural deposit containing varying amounts of calcium carbonate mixed with clay

3.2.8.21

meat meal

product obtained by drying and grinding, or otherwise treating, flesh or flesh fibre and to which no addition has been made

3.2.8.22

oil cake

residue remaining after the removal of the oil from oil seeds

3.2.8.23

peat

residual matter from plants grown and decayed in almost permanently waterlogged conditions and which can contain a limited quantity of naturally occurring mineral material

3.2.8.24

slurry

semi-liquid effluent from livestock, consisting of urine and faeces, possibly diluted with water

3.2.8.25

urea condensate

product of reaction between urea and aldehyde(s) that produce a slow release nitrogenous fertilizer

3.2.8.26

urea formaldehyde

UF

slow release nitrogenous fertilizer obtained by the reaction between urea and formaldehyde to produce molecular chains of general formula NH₂-CO-NH(CH₂NHCONH)_nH

3.2.8.26.1

methylene urea

MU

polymethylene urea

slow release nitrogenous fertilizer obtained by the reaction between urea and formaldehyde to produce oligomers or adducts of urea and formaldehyde

Note 1 to entry: It is chiefly composed of cold water-soluble fraction from methylenediurea (MDU) and dimethylenetriurea (DMTU) hot water-soluble fraction from trimethylenetetraurea (TMTU) and tetramethylenepentaurea (TMPU) and hot water-insoluble fractions from longer chain oligomers. It is generally free of methylolureas and methylol ethers. It is a source of slowly available nitrogen.

3.2.8.26.2

isobutylidene diurea

IBDU

slow release nitrogenous fertilizer obtained by the reaction between urea and isobutyraldehyde

Note 1 to entry: It is a source of slowly available nitrogen by virtue of particle size, solubility decreasing with increase in particle size.

3.2.8.26.3

crotonylidene diurea

CDU

slow release nitrogenous fertilizer obtained by the reaction between urea and crotonaldehyde

Note 1 to entry: It is a source of slowly available nitrogen.

3.2.8.26.4

cold water-insoluble nitrogen

CWIN

insoluble nitrogen fractions in urea formaldehyde or methylene urea products that are insoluble in phosphate buffer solution (pH 7,5) or distilled water at 25 degrees Celsius during a 15-min period

3.2.8.26.5

cold water-soluble nitrogen

CWSN

soluble nitrogen fraction in urea formaldehyde or methylene urea products that is soluble in phosphate buffer solution (pH 7,5) or distilled water at 25 °C during a 15-min period

Note 1 to entry: CWSN equals to total nitrogen minus CWIN.

3.2.8.26.6

hot water-insoluble nitrogen

HWIN

insoluble nitrogen fraction in urea formaldehyde or methylene urea products that is insoluble in phosphate buffer solution (pH 7,5) at 100 °C during a 30-min period

3.2.8.26.7

hot water-soluble nitrogen

HWSN

soluble nitrogen fraction in urea formaldehyde or methylene urea products that is soluble in phosphate buffer solution (pH 7,5) at 100 °C during a 30-min period

Note 1 to entry: HWSN equals to the total nitrogen minus HWIN.

3.2.8.26.8

hot water-soluble nitrogen only

HWSN only

soluble nitrogen fractions in urea formaldehyde or methylene urea products that are soluble in phosphate buffer solution (pH 7,5) at 100 °C during a 30-min period and insoluble in phosphate buffer solution (pH 7,5) or at 25 °C during a 15-min period

Note 1 to entry: HWSN Only = HWSN – CWSN = CWIN – HWIN.

3.2.8.26.9

triazone

water-soluble compound of formula C₅H₁₁N₅O₂ [5-(N-methyl)-urea-1,3,5-triazin-2-one or 5-methyleneureido-2-oxohexahydro-s triazine], produced by reaction of urea, formaldehyde, and ammonia

Note 1 to entry: It is a source of slowly available nitrogen.

3.3.1

density

mass per unit volume, applicable to both liquid and solid

Note 1 to entry: For a solid material, density can be various depending on the method of measurement.

3.3.2

bulk density

loose bulk density

mass per unit volume of a solid material after it has been tipped freely into a container under clearly specified conditions

3.3.3

bulk density

tapped bulk density

mass per unit volume of a solid material tipped into a container and then compacted under clearly specified conditions

3.3.4

particle size analysis granulometry by sieving

division of a sample into size fractions

Note 1 to entry: SGN, UI and GSI are used in some countries and regions.

Note 2 to entry: It can be accomplished by a sieve and particle distribution analyser.

3.3.5

sieving

process of separating a mixture of particles according to their sizes by one or more sieves

3.3.5.1

test sieving

sieving with one or more test sieves

3.3.5.2

undersize

portion of the charge which passes through a sieve of specified aperture size

3.3.5.3

oversize

portion of the charge which does not pass through a sieve of a specified aperture size

3.3.6

crushing strength

minimum force required to crush individual particles retained between designated sieve sizes

3.3.7

caking

formation of a coherent mass from individual particles

3.3.7.1

anti-caking

measure to prevent caking

3.3.7.2

anti-caking agent

substance incorporated in or applied as a surface treatment to a fertilizer to prevent caking

3.3.8

pourability

extent to which a fertilizer can be drained from its container by gravity as determined by an empirical procedure

3.3.9

sedimentation

process of particles settling in a fluid medium as a result of gravitational or other applied force

3.3.10

flow rate

mass flow of a material flowing freely through the outlet of a specified calibrated funnel

3.3.11

free flowing

fertilizer which flows easily without applying any additional force other than gravity

3.3.12

segregation

differential movement of particles within a mixture due to differences in their size, shape or density

3.3.13

porosity

volume fraction of the pores in a fertilizer

3.3.14

static angle of repose

angle at the base of the cone of fertilizer obtained by allowing a sample to fall onto a horizontal base-plate under specified conditions

3.3.15

size guide number

SGN

number that represents the typical particle size

Note 1 to entry: To calculate SGN, the opening in millimetres that retains or passes 50 % by weight is determined and then multiplied by 100.

Note 2 to entry: The typical particle size is also called the mass median diameter (D50).

3.3.16

uniformity index

UI

ratio of the size of small particles (R95) to large particles (R10) times 100

Note 1 to entry: A lower UI indicates a broad particle size distribution and a higher UI indicates a narrow distribution.

3.3.17

granulometric spread index

GSI

ratio of granulometric spread based on the spread over two standard deviations around the mass median particle diameter to mass median particle diameter

3.4.1

moisture

water extractable from a fertilizer by using a specified method appropriate to that fertilizer

3.4.1.1

essential water

water in stoichiometric quantities that forms an integral part of the molecular or crystal structure

3.4.1.2

water of crystallisation

essential water present in a stable solid hydrate

3.4.1.3

water of constitution

essential water that is released when the solid decomposes

3.4.2

ammoniacal nitrogen

portion of the inorganic nitrogen contained in fertilizer that exists in ammonium form

3.4.3

nitric nitrogen

portion of the inorganic nitrogen contained in a fertilizer that exists in nitrate form

3.4.4

ureic nitrogen

portion of nitrogen contained in a fertilizer that exists in ureic form

3.4.5

water-soluble phosphate

portion of the phosphate contained in a fertilizer that is soluble in water

3.4.6

ammonium citrate soluble phosphate

phosphate content of a fertilizer that is soluble in a solution of ammonium citrate and ammonia of a stated standardized concentration

Note 1 to entry: Water-soluble phosphorus is not included.

Note 2 to entry: Neutral and base ammonium citrate are both included.

3.4.6.1

neutral ammonium citrate soluble phosphate

phosphate content of a fertilizer that is soluble in a neutral solution of ammonium citrate and ammonia (pH 7,0)

3.4.7

citrate soluble phosphate

part of the total phosphate in a fertilizer that is insoluble in water but soluble in a solution of citrated of ammonium citrate

3.4.8

EDTA soluble phosphate

part of the total phosphate in a fertilizer that is insoluble in water but soluble in a solution of EDTA of a stated standardized concentration

3.4.9

EDTA extracted phosphate

phosphate extracted by a solution of EDTA (0,1 mol/l) at 60 °C

Note 1 to entry: In some regions, it is referred to as available phosphate.

3.4.10

available phosphate

sum of water-soluble and the citrated or EDTA soluble phosphate as based on regional or national regulation or in the absence of such regulations to be considered as the sum of water-soluble and citrated soluble phosphate or EDTA soluble phosphate

3.4.11

water-soluble potash

portion of the potash contained in fertilizer that is soluble in water

3.4.12

free acidity

sum of all acidic components in an un-neutralized state

3.4.13

neutralizing value

potential neutralizing capacities of 100 kg of product, measured through the reaction with a strong acid such as hydrochloric acid

Note 1 to entry: Several units may be used (CaO equivalent, CaCO3 equivalent or HO⁻ equivalent).

3.4.14

saturation temperature

temperature below which crystallization of dissolved constituents begins and above which the last crystals dissolve

3.4.15

disintegrable rate

rate at which a granulated product is disintegrated and dispersed in water during a specified time period

Note 1 to entry: This rate is expressed in mass fraction.

Note 2 to entry: This rate varies in function of the sieve size used and the mass fraction is obtained by the materials getting across the sieve compared with all materials.

Note 3 to entry: The disintegrated and dispersed process is also called “the breakdown of granulated fertilizer”.

3.4.16

longevity

time period over which slowly available plant nutrients from a fertilizer are released and made available for plants

3.4.17

reactivity

rate of reaction of a liming material with acid under specified conditions measured with a specific standard

3.4.18

liming effect

effect of a liming material on a pH increase and soil physical, chemical or biological properties

3.4.19

salt out temperature

SOT

temperature of a liquid fertilizer at which the salt content of the liquid exceeds its solubility

Note 1 to entry: At this temperature, a solid phase begins to form.

3.5.1

resistance to detonation

not capable of explosion concerning ammonium nitrate fertilizers of high nitrogen content under the circumstances of a specific test

3.5.2

oxidizing solid

solid which can contribute and intensify the combustion of other material by supplying oxygen

Note 1 to entry: For fertilizers, generally these products contain a high amount of nitrates.

3.5.3

oxidizing liquid

liquid which can contribute and intensify the combustion of other material by supplying oxygen

Note 1 to entry: For fertilizers, generally these products contain a high amount of nitrates.

3.5.4

GHS label

globally harmonized system label

appropriate group of written, printed or graphic information elements concerning a hazardous product, selected as relevant to the target sector(s), which is affixed to, printed on, or attached to the immediate container of a hazardous product, or to the outside packaging of a hazardous product

Note 1 to entry: GHS means the “Globally Harmonized System of Classification and Labelling of Chemicals”.

3.5.5

seedling emergence and growth

index which assesses the potential effect of fertilizer on seedling emergence and growth compared with control group

Note 1 to entry: It can be used for evaluating the harmful effects of fertilizers.

3.5.6

vegetative vigour

index which assesses the effect of fertilizer on plant growth compared to a control group

Note 1 to entry: It can be used for evaluating the various effects of fertilizers.

3.5.7

self-sustaining decomposition

oxidation process of a fertilizer which, after ignition sustains this oxidation without the availability of external oxygen

Note 1 to entry: The oxygen is generally present in the form of nitrates.

3.6.1

sampling unit

defined quantity of material having a boundary which may be physical (e.g. a container) or hypothetical (e.g. particular time or time interval in the case of a flow of material)

Note 1 to entry: A number of sampling units may be gathered together, for example in a package or box.

3.6.2

partial sample

partial increment

quantity of material taken at a point from a sampling unit

Note 1 to entry: This is also referred to as a sub sample.

3.6.3

increment

quantity of material taken from a sampling unit

Note 1 to entry: This may be constituted from a number of partial samples.

3.6.4

compound sample

combination of all increments from the lot or sampled portion

Note 1 to entry: The increments may be grouped together in equal numbers in order to form several samples which can be reduced and analysed separately for the purpose of statistical interpretation.

3.6.5

reduced sample

representative part of the aggregate sample obtained by a process of reduction in such a manner that the mass is at least the mass of the final samples

3.6.6

final sample

representative part of the reduced sample or, where no intermediate reduction is required, of the aggregate sample

Note 1 to entry: Often, more than one final sample is prepared, at the same time, from the reduced sample (or from the aggregate sample); one or more of these final samples is used as a laboratory sample or as laboratory samples, while others can be stored for reference purposes.

3.6.7

laboratory sample

final sample intended for laboratory inspection or testing

3.6.8

test sample

sample prepared from the laboratory sample and from which test portions are taken

3.6.9

test portion

quantity of material taken from the test or laboratory sample and on which the test or observation is actually carried out

3.6.10

producer’s risk

risk of error from rejecting a lot with a mean value which is satisfactory but which the analysis of the sample has accidentally been made to appear too low

3.6.11

consumer’s risk

risk of error from accepting a lot of insufficient quality which the analysis of the sample has accidentally been made to appear too high

3.6.12

batch

definite quantity of material manufactured or produced under conditions which are presumed to be uniform

3.6.13

consignment

quantity of material assigned by a document to an identified consumer

3.6.14

delivery

quantity of material transferred at one time

Note 1 to entry: This may be made up of one or more lots or parts of a lot.

3.6.15

lot

sample portion

total quantity of material, assumed to have the same characteristics, to be sampled using a particular sampling plan