Spatial distribution of micronutrients under different nitrogenand soil moisture regimes in drip irrigated mango (Mangifera indica L.) orchard

Spatial distribution of micronutrients under different nitrogen and soil moisture regimes in drip irrigated fruit crop of mango cv Dashehari was studied at Central Institute for Subtropical Horticulture, Lucknow. Soil moisture regimes consisted of four irrigation levels based on open pan evaporation (OPE) replenishments (90, 70 and 60% of OPE and one basin irrigation as control) and three fertigation levels of 75 and 50% of the recommended doses of nitrogen and no fertigation as control. The drip irrigation irrespective of fertigation significantly increased fruit yield and micronutrient concentrations (Zn, Cu, Mn and Fe) over basin irrigation. Among the irrigation levels, irrigation given to the replenishments of 60% of USWB Open Pan Evaporation was the best moisture levels in maintaining micronutrients dynamics and highest fruit productivity. These dynamics were statistically superior to 70 and 90% replenishments and at 1 metre horizontal distances from tree trunk than that at 1.5 metre. Statistical analysis of pooled data showed lower coefficient of variation and standard deviation in 0.60 OPE within soil profile as well as horizontal distributions.