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fertilisers and manures (fertiliser (is an inorganic,manufactured material…
fertilisers and manures
fertiliser
is an inorganic,manufactured material that may contain one or more of the essential elements required for crop growth
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UREA
Higher concentration of nitrogen than (CAN) less needed./ Urea turns to ammonium form then to nitrate before plant uptake./ MUST be stored in air tight conditions. undergoes volatilisation were ammonia turns to ammonia as go into atmsphere./ Toxicity to emerging seedlings. Apply before rain
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benefits of nitrogen
growth of leaf and stem/ provides photosynthesis or chlorophyll / protein/ cell division/increase yeild.
negative effects
reduces quality of potatoes / inhabits clover / affects silage preservation / water pollution / more prone to frost &burning
compound fertilisers
Compound fertilizers usually contain at least two of the minerals nutrients (N) ,(P) and (K) / they are labelled with 3 numbers to represent the % of (N), (P) and (k) in the fertilizer
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slurry
liquid manure/ slurry tank / contains less organic matter then (FYM) / fast reacting / spread diseases ,pests and docs leaves