SummaryThe effect of CaCO 3 and organic matter on the availability of iron and manganese was studied on sorghum (Sorghum bicolor). Addition of calcium carbonate caused significant decrease in dry matter and grain yield. But yields tended to increase with the addition of organic matter at the rate of 15 t/ha. The iron concentration decreased with the addition of CaCO 3 at all the stages of crop growth. Like iron, concentration of manganese also decreased with the increase in added CaCO 3. Organic matter increased the iron concentration both at seedling and flowering stage. The concentration of manganese was, however, dependent on the stage of the crop.
Ground magnetic data collected over Chikotra River in the peripheral region of Deccan Volcanic Province (DVP) of Maharashtra located in Kolhapur district was analysed to throw light on the structural pattern and distribution of magnetic sources within the basin. In order to isolate the magnetic anomalies showing varying trend and amplitude, several transformation operations including wavelength filtering, and upward continuation has been carried out on the reduced to pole anomaly map. Qualitative interpretation of these products help identify the distribution of magnetic sources, viz., the Deccan basalts, dolerite intrusives and older greenstone and schist belts in the subsurface. Present study suggests that the Chikotra basin is composed of three structural units; a NE-SW unit superposed on deeper NW-SE unit with randomly distributed trap flows on the surface. One of the major outcome of the present study is the delineation of almost 900-m thick Proterozoic Kaladgi sediments below the Deccan trap flows. The NE-SW magnetic sources may probably represent intrusives into the Kaladgi sediments, while the deeper NW-SE trends are interpreted as the northward extension of the Dharwars, underneath the Deccan lava flows, that forms the basement for the deposition of Kaladgi sediments.
A field experiment entitled, "Effect of inorganic and bio-fertilizers quality of summer groundnut (Arachis hypogaea L.)" was conducted at PG Research Farm, Agronomy Section, R.C.S.M. College of Agriculture, Kolhapur during summer, 2019. The experiment was laid out in factorial randomized block design (FRBD) with three replications and nine treatment combinations of three inorganic fertilizer levels F1-75% RDF (18.75:37.5:0 kg ha -1 ), F2-100% RDF (25:50:0 kg ha -1 ), F3-125% RDF (31.25:62.5:0 kg ha -1 ) and three bio-fertilizers levels B1-Control, B2-Rhizobium spp. + PSB (Lignite based), B3-Rhizobium spp.+ PSB (Liquid based). The crop was fertilized as per treatments by using urea and single super phosphate was given by placement method. The application of 100% of RDF ha -1 was comparable with 125% RDF ha -1 significantly over 75% RDF ha -1 in respect of recording higher value of quality attributes viz., oil content in kernel, oil yield, protein content in kernel and protein yield. The dual seed inoculation of Rhizobium spp. + PSB (Lignite based)as well as Rhizobium spp. + PSB (Liquid based) in respect of recording higher value of quality attributes viz., oil yield, oil content in kernel, protein content in kernel and protein yield. The quality attributes of groundnut were not influenced by the interaction effect of both the factors. This indicates that the both factors under study viz., inorganic and biofertilizer levels behaved independently in respect of quality of summer groundnut variety.
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