An Asian Journal of Soil Science

N. R. Marian ¹, K. G. Kachhave ¹

Affiliations
1 Department of Agricultural Chemistry and Soil Science, College of Agriculture, Marathwada Agricultural University, Parbhani (M.S.), IN

Abstract

A field experiment on fixed plot was conducted on nitrogen fractions under sorghum-sunflower cropping sequence by using organic and inorganic fertilizer treatments at Marathwada Agricultural University, Parbhani during 2001-2002. The doses based on soil test framed in 1997 which were found to be optimum for sorghum (80:40:40 kg N, P and K ha^-1) and for sunflower (60:40:30 kg N, P and K ha^-1).The results of these studies revealed that all nitrogen fractions like total hydrolysable nitrogen, amino acid nitrogen, organic ammonium nitrogen, acid insoluble nitrogen and total nitrogen were increased significantly in all treatment combination. The combined application of organics + inorganic fertilizers caused significant increase in available nutrients status of the soil. The relationship with availability and soil properties exhibited significantly negative correlation with soil pH and significant positive correlation with organic carbon and CaCO₃ of soil.

Keywords

Nitrogen Fractions, Relationship, Sorghum-Sunflower Sequence.

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Shubhangi J. Dhage ¹, K. G. Kachhave ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, Marathwada Agricultural University, Parbhani (M.S.), IN

Abstract

A field experiment was conducted to study the effect of dual inoculation of rhizobium and PSB on yield, nutrient (N, P, K) content, quality parameter i.e. protein as well as oil content and availability of nutrients in soil at harvest of soybean. The highest grain yield was recorded due to inoculation of rhizobium+PSB with 100% RDF. The highest grain yield of 15.46 q ha^-1 recorded in 100% RDF+rhizobium+PSB was significantly superior over all the treatments. However, lowest of 7.52 q ha^-1 were obtained in control. The highest N (6.23%), P (2.68%) and K (2.29%) contents in seed was obtained in T₁S₃ treatment. Dual inoculation of rhizobium+PSB also improved the quality of soybean in presence as well as absence of chemical fertilizer. The residual fertility in soil was also more due to 100% RDF+rhizobium+PSB treatment.

Keywords

Soybean, Biofertilizers, Rhizobium and PSB Inoculation, Yield, Quality.

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Shubhangi J. Dhage ¹, K. G. Kachhave ¹, S. T. Shirale ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, Marathwada Agricultural University, Parbhani (M.S.), IN

Abstract

A field experiment was conducted to study the effect of bio-fertilizers on nodulation, yield, nutrient uptake and biological properties of soil by soybean. The study revealed that 100% RDF with dual inoculation (Rhizobium+PSB) resulted in the highest grain (1363 kg ha^-1) and straw yields (1798 kg ha^-1). Bio-fertilizers increased nodule number, fresh as will as dry weight of nodule plant^-1 and also improved the soil fertility by increasing organic carbon content and effective bacterial population in soil. The yield and nutrient (N, P and K) uptake also increased due to dual inoculation in presence as well as absence of chemical fertilizers.

Keywords

Soybean, Rhizobium, PSB Inoculation , Bio-Fertilizes, Nodulation.

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