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Shilpa Babar ¹, P. K. Rathod ¹, V. G. Salvi ¹, V. P. Badole ¹

Affiliations
1 Krishi Vigyan Kendra, College of Agricuture, Dhule (M.S.), IN

Abstract

Soil samples from fourteen profiles from five districts of Central and Western Vidarbha region of Maharashtra were studied for the distribution of different forms of potassium and for their relationship with some soil properties. The soils of Wardha, Nagpur, Chandrapur and Bhandara districts were slightly calcarious neutral to alkaline in reaction and the soils of Gondia district was non-calcarious and sightly acidic in reaction. The Central Vidarbha soils were clay in texture having high in organic carbon content. Whereas the soils of Eastern Vidarbha were clay loam, sandy clay loam and low in organic carbon content. No definite trend was observed in the forms of potassium except exchangeable and available K, they were decreased with increase in depth. The available K and exchangeable K increased with the increase in organic carbon (r = 0.4680**, r = 0.4526**). The availability of exchangeable K increased with increase in clay content (r = 0.2888**). The non-exchangeable K was also increased with clay content (r = 0.7141**) and EC (r = 0.6444**) in Eastern Vidarbha region. The availability of total K and lattice K increased with increase in organic carbon (r = 0.4303, r = 0.4785) and clay content (r= 0.5189*, r = 0.4631*) in Eastern Vidarbha region of Maharashtra.

Keywords

Distribution Pattern, Forms of Soil K, Soil Depth, Relationship with Soil Properties.

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Shilpa Babar ¹, J. H. Dongale ²

Affiliations
1 Department of Crop Production, Central Institute for Cotton Research, Nagpur (M.S.), IN
2 Department of Soil Science and Agricultural Chemistry, Dr. Babasaheb Sawant Konkan Krishi Vidyapeeth, Dapoli, Ratnagiri (M.S.), IN

Abstract

The field experiment was conducted to study the effect of integrated nutrient management on nutrient content and uptake in mustard-cowpea-rice cropping sequence in lateritic soil of Konkan. The soil fertility parameters viz., bulk density, porosity, organic carbon content, microbial count (bacteria, fungi, actinomycetes) and content of available nutrients (NPK) in soil showed significant improvement with the application of organic, inorganic and organic+inorganic sources of nutrients compared to control treatment. The highest microbial count in soil was contributed under INM T₇ treatment and its effects were significantly superior over to those of chemical fertilizes alone (T₃) or use of organic manure alone (T₂). The content of available nutrients in soil was also slightly higher with T₇ treatment compared to use of only chemical fertilizers (T₃). It is therefore, in lateritic soil of Konkan for mustard-cowpea-rice cropping sequence the integrated nutrient management practice i.e. application of 50 per cent recommended dose of N, P₂O₅ and K₂O be applied through chemical fertilizers and the remaining 50 per cent recommended dose be applied through manure for each crop in the cropping sequence for soil fertility sustenance and saving of chemical fertilizers. For mustard and cowpea FYM be used as manure and for rice, glyricidia green leaf manuring be used.

Keywords

Lateritic Soil, Mustard, Cowpea, Rice, Available N, P and K, Organic Carbon.

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Shilpa Babar ¹, P. K. Rathod ¹, A. H. Narkhede ¹, S. D. Rathod ¹, A. C. Yewale ¹

Affiliations
1 Dept. of Soil Science and Agricultural Chemistry, Agricultural Research Station, K.Digraj, Sangli (M.S.), IN

Abstract

Forms of potassium, nutrients status and their interrelationship with total and available nutrient were investigated in forty-five soil samples representing fourteen profiles from five districts (Typic Haplusterts) of Central and Western Vidarbha region of Maharashtra. The available, water soluble, exchangeable, non exchangeable and lattice K contributed 1.97, 0.12, 1.88, 11.25 and 86.76 per cent towards total soil K in the given soils. The soils of Wardha, Nagpur, Chandrapur and Bhandara districts were slightly calcarious neutral to alkaline in reaction and the soils of Gondia district was non calcarious and sightly acidic in reaction. The Central Vidarbha soils are clay in texture having high CEC and organic carbon content. Where as the soils of Eastern Vidarbha is clay loam, sandy clay loam, low in CEC and organic carbon content. No definite trend was observed in the forms of potassium except exchangeable and available K they are decreased with increase in depth. The available K, exchangeable K, total K and lattice K, influenced by total N (r=0.3268*, r=0.3122*, r=0.2950, r=0.3079*) respectively. The available K and exchangeable K is also affected by available N (r=0.9784**, r=0.9773**) respectively, in Vidarbha region. In Central Vidarbha available and exchangeable K influenced by total and available N respectively. In eastern Vidarbha the available K and exchangeable K influenced by total S and available N.

Keywords

Forms of Soil K, Soil Depth, Relationship With Total and Available Nutrients.

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