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University of Agricultural Sciences Raichur (2016)

SOIL RESOURCES INVENTORY OF DONGARAGAON MICRO-WATERSHED FOR LAND CAPABILITY CLASSIFICATION AND CROP SUITABILITY USING REMOTE SENSING TECHNIQUES

MAHESHKUMAR

Titre : SOIL RESOURCES INVENTORY OF DONGARAGAON MICRO-WATERSHED FOR LAND CAPABILITY CLASSIFICATION AND CROP SUITABILITY USING REMOTE SENSING TECHNIQUES

Auteur : MAHESHKUMAR

Université de soutenance : University of Agricultural Sciences Raichur

Grade : Master of Science (Agriculture) 2016

Résumé
An investigation was made to characterize and evaluate the soil resource of Dongaragaon micro-watershed in North-eastern dry zone of Karnataka under semi-arid tropics for their morphological, physical, chemical, fertility characteristics and suitability for major crops. Among ten mapping units obtained three different landforms viz., upland, midland and lowland revealed the slope varying from very gentle sloping (1-3%) to steep sloping (1525%). The soils have dark reddish brown (5YR 3/2) and very dark greyish brown (10YR 3/2) colour. The physical characteristics like texture, BD, porosity and MHWC ranged from sandy clay loam to clay, 1.24 to 1.55 Mg m-3, 31.54 to 43.80 per cent, and 25.47 to 61.47 per cent, respectively. Chemical characteristics like pH (1:2.5), EC in soil:water ratio, OC, N, P2O5, K2O, S, CaCO3, CEC, BS and ESP ranged from neutral to alkaline in reaction, 0.1 to 0.3 dS m-1,3.90 to 19.9 g kg-1, 78 to 358 kg ha-1, 10.1 to 86.8 kg ha-1,78 to 610 kg ha-1, 1.7 to 44.7 ppm, 3.51 to 6.47 per cent, 30.23 to 72.42 cmol (p+) kg-1, 89.74 to 95.72 per cent and 1.62 to 5.82 per cent, respectively. The agriculture land of area qualifies for land capability classes IIIefs, IIItesf, IIItsf, IVs, IVes, IVesf, VIw and VItw. Generally, upland area were marginally suitable (S3) for cultivation of field crops like cotton, sorghum, and pigeonpea presently, lowland and midland were also moderately suitable for cultivation these crops with moderate limitations of drainage and fertility aspects. Whereas horticulture crop like mango, guava and sapota were not suitable (N) in upland because of sever limitation of depth. Whereas in lowland and midland these crops were moderately suitable with moderate limitations.

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