A field experiment was carried out during therabiseason of 2004-05 to find out the effect ofRhizobiumand phosphate solubilizing bacterial (PSB) inoculants on symbiotic traits, nodule leghemoglobin, and yield of five elite genotypes of chickpea. Among the chickpea genotypes, IG-593 performed better in respect of symbiotic parameters including nodule number, nodule fresh weight, nodule dry weight, shoot dry weight, yield attributes and yield. Leghemoglobin content (2.55 mg g−1of fresh nodule) was also higher under IG-593. Among microbial inoculants, theRhizobium+ PSB was found most effective in terms of nodule number (27.66 nodules plant−1), nodule fresh weight (144.90 mg plant−1), nodule dry weight (74.30 mg plant−1), shoot dry weight (11.76 g plant−1), and leghemoglobin content (2.29 mg g−1of fresh nodule) and also showed its positive effect in enhancing all the yield attributing parameters, grain and straw yields.

ABSTRACT:A study was conducted to explore the spatial variability of major soil nutrients in a soybean grown region of Malwa plateau. From the study area, one hundred sixty two surface soil samples were collected by a random sampling strategy using GPS. Then soil physico-chemical properties i.e., pH, EC, organic carbon, soil available nutrients (N, P, K, S and Zn) were measured in laboratory. After data normalization, classical and geo-statistical analyses were used to describe soil properties and spatial correlation of soil characteristics. Spatial variability of soil physico-chemical properties was quantified through semi-variogram analysis and the respective surface maps were prepared through ordinary Kriging. Exponential model fits well with experimental semi-variogram of pH, EC, OC, available N, P, K, S and Zn. pH, EC, OC, N, P, and K has displayed moderate spatial dependence whereas S and Zn showed weak spatial dependence. Cross validation of kriged map shows that spatial prediction of soil nutrients using semi-variogram parameters is better than assuming mean of observed value for any un-sampled location. Therefore it is a suitable alternative method for accurate estimation of chemical properties of soil in un-sampled positions as compared to direct measurement which has time and costs concerned.

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Experimentation at twenty farmer's field of tribal area of Mandla district of Madhya Pradesh during Kharif 2015-16 considering zinc variability in soil as low, medium and high, and Zn levels through ZnSO4 7H2O in a RBD. The soils of selected sites wer clayey, alkaline in pH, organic carbon varied from less to marginal and varied in available Zn from 0.12 to 2.17 mg kg -1 . The rice MTU-1010 seed was sown @ 80 kg ha -1 with recommended practices and harvested at maturity (120 DAS). Significant effects were noted on growth and yield components yield content and uptake by rice: plant height in S-12 (36.73 cm), no. of tillers/ hill (9.79) in S-17, no. grains/panicle varied from 53.00 (S-6) and to 71.33 (S-7) and test weight (24.25 g) in soil S-7. Yield was recorded S-9 (4.75 t/ha) which was at par with S-14 (4.47 t ha -1 ). Highest tillers per hill -1 (8.15) were noted with basal application @ 8 kg Zn ha -1 but similar with (8.03) just 6 kg and low with no zinc. It had also increased the yield (3.57 t ha -1 ) but at par with 6.0 kg Zn ha -1 (3.44 t ha -1 ). Zinc content and its uptake varied and recorded more in 8.0 kg Zn ha -1 but equal to 6.kg Zn ha -1 .