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Fertilizers used for organic farming: |
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Fertilizers used for organic farming.
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- The major sources of organic plant
nutrients in India are farmyard manure, rural and urban compost, sewage sludge,
press mud, green manures, crop residues, forest litter, industrial waste and by-products.
- The number of bio-fertilizers
such as blue green algae (BGA) and azolla are used extensively to meet the nitrogen
demand of the crop. Small quantities of powdered neem cake are also used. These
organic nitrogen supplements unlike the fertilizer nitrogen do not suffer any loss
in the fields.
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- Phosphorous-solubilising and mobilising organisms such as phosphobacterium and vesicular
arbuscular mycorrhizae (VAM) are quite helpful in meeting the phosphorus demand
of the crop. Potassium for the crops can be supplied by using potassium rich organic
amendments such as burnt rice, rice straw composted using tricoderna harzianum and
composted coconut coir pith
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