An experiment was conducted during 2002 to study the morphological physiological and biochemical effects of foliar spray of nutrients and plant growth regulators on yield and productivity of blackgram. The treatments include foliar spray of 2% DAP, 0.2% Boric acid, 0.5% FeSO,, 0.5% ZnSO, 0.5% sodium molybdate, 2% urea, 0.1% humic acid, 1% KC1, Salicylic acid 100 ppm, Brassinolide 0.1 ppm and humic acid 20 kg basal application. Among these treatments, foliar spray of 2% urea recorded the highest yield of 955.2 kg/ha followed by foliar spray of KC1 1% along with soil application of humic acid 20 kg/ha (926.2 kg/ha). The yield enhancement may be due to improved morphological, physiological and biochemical parameters. The tested chemicals particularly 2% urea were found effective towards yield maximization in black gram.
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Tamil Nadu Agricultural University
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Tamil Nadu, India.
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