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 Application of 10-15 t FYM or vermicompost / ha is sufficient to meet the micronutrient
requirement as well as marinating soil fertility status. In case of non-availability of
FYM/vermicompost in adequate quantity, apply 4-5 t FYM/vermicompost with half of the
recommended dose of zinc for better result.
 Maximum crop production could be achieved by application of biogass slurry mixed with
2.5 kg Zn / ha in acute Zn deficient soils. The use of green manure also helps in increasing
the level of available micronutrients in soil and crop yield, although the production of
green manure in intensive farming system is possible only in the case of availability of
irrigation.
 Comparison of partially soluble sources of Zn such as zinc oxide, zinc carbonate and zinc
fritts with soluble sources such as zinc sulphate hepata hydrate and zinc sulphate mono
hydrate, it was found that the ability of partially soluble sources is equivalent to zinc
sulphate in heavy textured and zinc fixing soils. Whereas, soluble source like zinc sulphate
is the best in light textured soils.
 The customized fertilizer having micronutrients such as zincated super, zincated urea etc.
were found to be less effective than zinc sulphate or chelated zinc. But the customized
fertilizers can be used soils having latent zinc deficiency.
 Zn can be supplied by seed coating of Typrosin zinc or zinc sulphate slurry. But in the
case of excessive deficiency, seed treatment is not enough to supply zinc to plants.
 Generally, zinc fertilizer is either broadcasted or band placed at the time of sowing.It
could be top-dressed 45 days after sowing or could be applied as foliar spray,if not given
as basal application.
 When the symptoms of zinc deficiency appear in standing crop, its deficiencies could be
mitigated by foliar spray of 0.5% zinc sulphate hepta hydrate or 0.36% zinc sulphate mono
hydrate at 7-10 days’ interval.
 Organic manures should be applied to soil for enhancing utilization capacity of zinc
containing fertilizers. The efficiency of organic manures in enhancing zinc availability in
soils has been assessed and it is as follows: poultry manure > FYM > compost
>biogasslurry> sewage-sludge > municipal compost > press mud. The residual Zn
availability in soil was higher in combined use of zinc fertilizer and organic manures
compared to that in only use of zinc fertilizer.
 It was found that application of 0.5% zinc sulphate at critical crop growth stages enhances
zinc concentration in crop produce. If the soil is deficient in zinc, zinc needs to be applied
as basal fertilizer along with foliar spray.
 Generally, Zn is broadcasted in soil. But other method like top dressing, band placement,
foliar spray and seed treatment are also common.
 Since sufficient amount of residual Zn remains as available in soils for the next crop, there
is no need to use zinc in every crop to get more productivity and profit.
 In alkaline soil, gypsum application is recommended to enhance efficiency of applied Zn.