Vol. 8, Issue 1 (2020)
Soil organic carbon status under different land use systems and soil fertility status of Rachanahalli sub watershed, Yadgir district in Karnataka, India
Author(s): Rajendra Hegde, TN Somashekar, SP Chaitra, GM Arpitha, G Bardhan, MB Mahendra Kumar, BA Dhanorkar, KV Niranjana and P Chandran
Abstract: The decline in productivity of Indian soils under rainfed area is due to deteriorating soil fertility and scanty rainfall with uneven distribution. The present study was carried out in Rachanahalli Subwatershed of Yadgir taluk and district, Karnataka under SUJALA-III project to assess the soil organic carbon status under different land use systems and soil fertility status through Land Resource Inventory (LRI) by using Remote Sensing, GIS Techniques and Field Survey. A total of 589 geo-referenced composite surface soil samples at 325x325 m grid interval along with land use details and soil morphological features of soil profiles were studied and collected. The soils were analysed for soil organic carbon and fertility status (macro and micronutrients) using standard methods of analysis. Based on the soil test values of Organic carbon and soil nutrients, the soils were grouped under low, medium, high/deficient or sufficient. The major land use systems identified in the subwatershed area were groundnut, paddy, cotton, redgram, sorghum, ragi, currently fallow, permanently fallow and scrub land. The Soil Organic Carbon status under different land use systems revealed that soils under groundnut cultivation are high in soil organic carbon followed by paddy, cotton, currently fallow, red gram, sorghum, ragi, permanently fallow and scrubland. The soils under groundnut cultivation have high organic carbon content as compared to other land use systems and lowest carbon content was in the scrub land areas. The soil fertility status of the study area revealed that majority of the soils are slightly to strongly alkaline in soil reaction. All the soils of the subwatershed are non saline. Soil organic carbon status is high to medium, available phosphorous is medium to low and available potassium is medium to high. Available sulphur and boron is medium to low in most of the soils. Available iron, copper and manganese are sufficient in the most of the soils. Available zinc is deficient in most of the soils in the Subwatershed. Apart from scanty and irregular rainfall in the semi arid tropical soils, the nutrient deficiency of soils have resulted in declined crop productivity. Hence, the site specific nutrient management based on crop requirement is a key to sustain crop productivity in rainfed areas.
DOI: 10.22271/chemi.2020.v8.i1j.8345
Pages: 680-686 | 655 Views 135 Downloads
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How to cite this article:
Rajendra Hegde, TN Somashekar, SP Chaitra, GM Arpitha, G Bardhan, MB Mahendra Kumar, BA Dhanorkar, KV Niranjana, P Chandran. Soil organic carbon status under different land use systems and soil fertility status of Rachanahalli sub watershed, Yadgir district in Karnataka, India. Int J Chem Stud 2020;8(1):680-686. DOI: 10.22271/chemi.2020.v8.i1j.8345
