Productivity of alkali soils can be enhanced by applying
Gypsum
Urea
Organic manure
Lime
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18
Answer:
urea
Explanation:
Apply 25 to 40 kg Zinc Sulphate per hectare to rice for first few years and then it should be applied on soil test basis. Farmyard manure, organic residues and green manures help in increasing the productivity. ... Initially, alkali soils are high in available phosphorus.
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