Nutrient Status of Some Coastal Soils of Guntur District, Andhra Pradesh
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Authors
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TANTUJA NANDY
Agricultural College, Acharya N. G. Ranga Agricultural University, Bapatla - 522 101, Guntur, Andhra Pradesh, India
Keywords:
Coastal soils, Nutrient status, Macronutrient, MicronutrientAbstract
Coastal soils of Guntur district in Andhra Pradesh are developed from marine sediments. Nutrient status was evaluated for four soil profiles of a coastal village to have information on the nutrient supplying capacity of these soils which is necessary for making accurate fertilizer recommendation in the study area. The nutrient status of the soils indicated that they were low in organic carbon (0.007 to 0.058 g kg-1), available nitrogen (28 to 247 kg ha-1), medium to high in available phosphorus (6.60 to 90.10 kg ha-1) and high in available potassium (241 to 2016 kg ha-1) while concentration of total nitrogen, phosphorus and potassium varied from 100 to 560, 37 to 325 and 625 to 7500 ppm, respectively. Similar trend in sub-surface distribution of organic carbon and total nitrogen revealed the soils were old alluvial soils except profile 2. Sufficiency in available micronutrient content existed except for zinc. Distribution of total micronutrient within the profile showed lower values on surface than subsurface layers indicating fluvial nature of deposition. Relationship of nutrients with organic carbon and clay content were positive while the acidity of the soils resulted in negative affect on micronutrients except copper. Contribution of parent material was significant in case of total potassium.
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