BS ISO 8157:2015 pdf free.Fertilizers and soil conditioners-Vocabulary.
BS ISO 8157 defines terms relating to fertilizers and soil conditioners.
2 Terms and definitions
For the purposes ot this document, the tollowing terms and definitions apply.
2.1 Generalterms
2.1.1 fertilizer
substance containing one or more recognized plant nutrient(s), which is used for its plant nutrient content and which is designed for use or claimed to have value in promoting plant growth
2.1.2 plant nutrient
chemical element, which is essential for plant growth
2.1.3 fertilizer nutrient
plant nutrient applied in the course of fertilization
Note ito entry: Some countries/regions declare/express nutrients in their oxide forms (e.g. LaUJ but also in their elementary forms. primary nutrient (element)
elements nitrogen, phosphorus, and potassium only
Note 1 to entry: Macronutrient is also used. These include the following plant food: nitrogen (N), available phosphate (P205), and soluble potash (K20).
Note 2 to entry: The following definition is recognized by some specific countries/regions: macro nutrient is the sum of primary and secondary nutrients, such as N, P. K, and Mg, Ca, as well as S (Na. Si). secondary nutrient (element)
elements calcium, magnesium, and sulfur
Note 1 to entry: Sodium (Na) is one of the secondary nutrients (elements) in some countries/regions. micronutrient; trace element
element, such as boron, manganese, iron, zinc, copper, molybdenum, cobalt, and/or chlorine, which are essential, in relatively small quantities, for plant growth
2.1.4 beneficial substance or elements
substance or element other than primary, secondary, or micronutrient that can be demonstrated by scientific research to be beneficial or may be essential to one or more species of plants, when applied exoge nously
2.1.5 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.
2.1.6 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, specifically, for the nutrition of plants and that may improve soil structure
2.1,7 organic nitrogenous fertilizer
material of biological origin in which the declarable nitrogen content is organically combined with carbon and which may contain other elements, but which do not have declarable phosphorus or potassium contents
2.1.8 synthetic nitrogenous fertilizer
nitrogenous fertilizer in which the nitrogen is combined with carbon by organic synthesis
2.1.9 organo-mineral fertilizer semi-organic fertilizer
product in which declared nutrients are of both organic and inorganic origin obtained by mixing and/or chemical combination of organic and inorganic fertilizers
2.1.10 organo-mineral compound fertilizer
organic-inorganic compound fertilizer
compound fertilizer containing an amount of organic fertilizer
2.1.11 slow release fertilizer
fertilizer, of which, by hydrolysis and/or by biodegradation and/or by limited solubility, the nutrients available to plants Is spread over a period of time, when compared to a “reference soluble” product, e.g. ammonium sulfate, ammonium nitrate, and urea.BS ISO 8157 pdf free download.