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Manure is organic matter that is used as organic fertilizer in agriculture. Most manure consists of animal feces ; other sources include compost and green manure . Manures contribute to the fertility of soil by adding organic matter and nutrients , such as nitrogen , that are utilised by bacteria , fungi , and other organisms in the soil .
More precisely, the first number ("N value") is the percentage of elemental nitrogen by weight in the fertilizer; that is, the mass fraction of nitrogen times 100. The second number ("P value") is the percentage by weight of phosphorus pentoxide P 2 O 5. The third number ("K value") is the equivalent content of potassium oxide K 2 O. [3]
Phosphate rich organic manure is a type of fertilizer used as an alternative to diammonium phosphate and single super phosphate.. Phosphorus is required by all plants but is limited in soil, creating a problem in agriculture In many areas phosphorus must be added to soil for the extensive plant growth that is desired for crop production.
Manure is an abundant resource with estimations for cattle manure in the US alone reaching two billion tons annually, [9] and one hen has the potential to produce a cubic foot of manure every six months. [10] By adding manure to crops it adds nitrogen, potassium, phosphorus, sulfur, magnesium and calcium. [11]
A fertilizer (American English) or fertiliser (British English) is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients. Fertilizers may be distinct from liming materials or other non-nutrient soil amendments. Many sources of fertilizer exist, both natural and industrially produced. [1]
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