Effects of foliar application of nitrogen and molybdenum on the uptake of nitrogen, seed yield and its quality of soybeans (Glycine max (L.) Merr.)

Abstract

Effects of foliar nutrition of soybeans (cv.PB-I) with nitrogen andmolybdenum on the seed yield and its quality are reported. Nitrogen uptakewas positively affected by the foliar application of nitrogen. Foliar applcationof 1% ammonium nitrate solution t30kgN/ha) during the early pod-fill periodhas significantly increased the seed yield and the % protein in seeds. Thiseffect was further enhanced by incorporation of 0.05%ammonium molybdatein the spray solution. Application of nitrogen: 3.0kgN/ha at two leaves tV22),15kgN/ha at early flowering (RI-R2) and 30kgN/ha at early pod-fill (R4-R5)periods had a better effect on the seed yield and the % protein in seeds. Thehighest seed yield (1727 kg/ha), protein yield (703.4 kg/ha) and fats (351.6kg/ha) were recorded in the fertilizer treatment where nitrogen was appliedtogether with molybdenum at all three stages of growth.