RESIDUAL AND CUMULATIVE EFFECT OF ORGANICS AND INORGANIC P ON SOYBEAN (Glycine max L) ONION (Allium cepa L) PRODUCTION SYSTEM IN A HIGH P ALFISOL
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 62
Abstract
A field experiment was conducted during kharif (soybean), 2012 and rabi (onion) 2012-13 in a sandy clay loam, at college farm, College of Agriculture, Rajendranagar, Hyderabad to study the response to P levels (0, 30 and 60 kg P2O5 ha-1) either alone or in combination with PSB @ 5 kg ha-1, biochar @ 5 t ha-1, humic acid @ 20 kg ha-1 and citric acid @ 10 mM concentration to study the direct, residual and cumulative effects of the treatments imposed on yield of soybean(direct) and onion (Residual and Cumulative). The mean seed yield of the soybean with biochar was 2077 kg ha-1, which was significantly higher against the control seed yield of 1329 kg ha-1. In onion, among organics, biochar application led to a statistically significant positive effect on both biomass and yield. Biochar resulted in a significant increase in mean onion yield to 22.1 t ha-1 against 15.8 t ha-1 when organics were not supplemented, the yield response being 39.9 per cent across inorganic P and mode of effect. Cumulative effect was found to show significant influence resulting in a mean yield of 21 t ha-1 which was higher by 22.1 per cent as against 17.2 t ha-1 due to the residual effect.
Authors and Affiliations
K. KALYANI
Keywords
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