Nitrogen crop requirements

Hiilsbergen K-J, Feil B, Diepenbrock W (2002) Rates of nitrogen application required to achieve maximum energy efficiency for various crops results of a long-term experiment. Field Crops Res 77 61-76... 

The fertilizer industry requires a large amount of nitrogen fertilizers for food crops around the world. Modem hybrid varieties of food crops require... 

Bor-Nitrophoska . [BASF AG] Complex fertiliza with 13% nitrogen, 13% phosphate, 21% potash, 0.1% boron for agric. crops requiring brxon and horticultural crt s not sensitive to chloride. 

Fertilisation (cereals crops requirements, soil nitrogen mineralisatioii. 

Cereal production kinetics of crop requirements and soil nitrogen mineralisation rates Fruit growing fertilisation, fruit quality, hedgerows, biodiversity... 

Plan their use of livestock manure and manufactured nitrogen fertilisers to ensme that they do not apply more nitrogen than their crops require. 

Excess nitrogen, potassium and sodium also leads to higher levels of impurities in the sugar. This makes the sugar more difficult and expensive to extract in the factory. This is now one of the measured factors determining price so it is important that growers tailor their fertiliser applications to the crop requirements and take into account the nutrient contribution from any organic fertiliser applied in the form of slurry or manure. 

In 1997 fixed nitrogen in various NP, NK, and NPK compounds added up to about 15% of the nutrient s worldwide consumption IFA (22). But because most crops require more nitrogen than P or K, applications of compound fertilizers have to be often followed by additional amounts of nitrogen. 

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