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Available nitrogen content was comparatively more in surface soils than in sub surface soils all along the water course of distributory-6. Available phosphorous status in soils at the tail reach was comparatively more than that of head reach. Irrespective of surface and sub surface soils available potassium status was medium and was comparatively less in sub surface than in surface soils. However increasing trend of potassium from head to tail via middle reach along the water course was observed. Available sulphur status was medium in surface and low in sub surface soils all along the water course. Available nitrogen, phosphorous, potassium and sulphur were strongly correlated with organic carbon (0.950, 0.989, 0.986 and 0.989) and dehydrogenase activity (0.934, 0.979, 0.980 and 0.982). Higher concentration of DTPA extractable micronutrients namely, Fe, Cu and Zn in surface than in sub surface soils was observed all along the water course. However fertility status of soils along the water course was low with respect to both available N and P, medium with respect to available K, S, Fe and Zn while high with respect to available Cu and Mn.

asian journal of soil science/asian journal of soil science

Fertility status of soil along the water course of selected distributory-14 of Shahapur branch canal of UKP command area in Yadgir district of Karnataka