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Influence of inorganic, biological and organic manures on nodulation and yield of soybean (Glycine max Merril L.) and soil properties

Australian Journal of Crop Science (Impact Factor: 1.63). 09/2013; 7(9):1407-1415.

ABSTRACT The effect of inorganic, biological and organic manures on nodulation and yield of soybean and soil properties was studied during rainy seasons of 2008 and 2009 in India (Manipur). The experiment consists of nine treatments viz., T1 - Absolute control, T2 – FYM (Farmyard manure) at the rate of 5 t ha-1, T3 -Vermicompost at the rate of 1 t ha-1, T4 - 100% RDF (Recommended dose of fertilizer), T5 - 100% RDF + PSB, T6 - 75% RDF + vermicompost at the rate of 1 t ha-1, T7 - 75% RDF + vermicompost at the rate of 1 t ha-1 + PSB, T8 - 50% RDF + vermicompost at the rate of 1 t ha-1 and T9 - 50% RDF + vermicompost at the rate of 1 t ha-1 + PSB. The experiment was replicated thrice in randomized block design. The results revealed that integration of 75% RDF with vermicompost at the rate 1 t ha-1 and PSB produced significantly higher plant height, number of nodules plant, dry weight of nodules plant-1, pods plant-1 and seed index than the other treatments. Similarly, significantly higher grain and stover yield were obtained from the application of 75% RDF as inorganic fertilizer in combination with vermicompost at the rate of 1 t ha-1 followed by seed inoculation of PSB. The oil and protein content of seed were increased significantly due to the application of 75% RDF coupled with vermicompost at the rate of 1 t ha-1 and PSB. The available N, P and K of soil after the harvest of soybean were improved significantly due to the integration of inorganic fertilizers with organic manures. Soil pH and organic carbon were improved due to the application of organic manure. Maximum net return and B: C ratio was also recorded from the integration of 75% RDF coupled with vermicompost at the rate 1 t ha-1 and PSB. Thus, it shows the positive impact of biological and organic manure application on reduction of chemical fertilizer use.

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