Spatial distribution of macronutrients in soils of arid tract ofPunjab, India
2005
Verma, V.K. | Patel, L.B.,Punjab Remote Sensing Centre, Ludhiana(India)
Surface soil samples from 208 sites were collected, analyzed andclassified to assess and map soil fertility status of Mansa district,Punjab. The soils are low in organic carbon content. It ranged from 0.02to 0.40% with a mean value of 0.29%. The available phosphorus content ofthese soils varied from 1.8 to 59.6 kg ha-1 with a mean value of 18.46 kgha- 1. The available potassium content of these soils is generally mediumto high, and only 3% soil samples tested low in available K. It rangedfrom 67.2 to 851.2 kg ha-1 with a mean value of 291.15 kg ha-1. Thenutrient index w.r.t. available N, P, K were also calculated on blockbasis. Seven categories of soil fertility (w.r.t. available N, P and K), viz.,Low-Low-Low (LLL), Low-Low-Medium (LLM), Low-Low-High (LLH), Low-Medium-Medium (LMM), Low-Medium-High (LMH), Low-High-Medium (LHM)and Low-High- High (LHH) were mapped. The present study revealed thatthere is wide variation in soil fertility status of soils developed onvarious land forms in Mansa district, but, by and large, the soils are lowin available N, low to high in available P and medium to high in availableK content.
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