National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The study was conducted at coastal zone of Karnataka to characterize the acidity of soils and to assess calcium and magnesium status of soils under paddy land is cover. Soil samples were collected at depth of 0-15cm from paddy growing areas of Dakshina Kannada and Udupi districts. The collected soil sample were processed and analyzed to know the physical and chemical properties of soil, the nature of soil acidity and the status of exchangeable calcium and magnesium in soils. The result from the present investigation revealed that active acidity was ranged from 2.19 x 10-6 to 8.9 x 10-5mol H+ L-1, exchangeable acidity was in the range of 0.401 to 5.959 cmol (p+) kg-1 g, pH dependent acidity varied from 3.000 to 49.875 cmol (p+) kg-1 and the total potential acidity which included both exchangeable and pH dependent acidity ranged from 4.98 to 50.818 cmol (p+) kg-1. From the investigation we came to know that more than 99.9 per cent of the total acidity in soils was found to be in the form of potential acidity and out of which nearly 8 per cent was in the form of exchangeable acidity. However, the order of distribution of different forms of acidity was found to be as follows; pH dependent acidity>Exchangeable acidity>Active acidity.
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