Boron (B) and zinc (Zn) deficiencies are widespread in alkaline,
calcareous and low organic-matter soils of Pakistan. In the present
study, the Cotton crop responded positively to application of B and
Zn fertilizers. Plant growth, productivity and nutritional value of
cottonseeds were improved, very cost-effectively, by optimizing B
nutrition. Fertilizer B requirement was 1.0 kg B ha-1 and HCl
extractable soil B critical range appears to be 0.5-0.6 mg kg-1
soil. . Similarly, use of Zn fertilizer in cotton promoted seed
cotton yield, boll bearing, boll weight, and seed index. Zn
application at rate of 7.5 kg ha 1 was most cost-effective. Certain
plant physiological parameters, such as membrane integrity and
chlorophyll content, were improved with better Zn nutrition of
plants. Moreover, both B and Zn fertilizers showed residual effects
in cotton - wheat system."
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