Residual effect of zinc and zinc enriched organic manures on DTPA - micronutrients status

摘要

The use of high analysis fertilisers with non-recycling of organic wastes to achieve the targeted food production to feed the ever increasing population not only causes soil health problems but also depletes the nutrient status of the soil besides causing poor soil productivity. The applied organic manures do not exhaust their entire nutrient reserve to the first crop itself. The residual effect is more and persisted even after the harvest of fourth crop (Gupta et al. 1986). Hence, this experiment was carried out to evaluate the residual effect of applied Zn and Zn enriched organic manures on micro nutrient concentration in the plant and its availability in the soil.