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Sharma, S and Chander, G and Verma, T S and Verma, S (2013) Soil Potassium Fractions in Rice-Wheat Cropping System after Twelve Years of Lantana Residue Incorporation in a Northwest Himalayan Acid Alfisol. Journal of Plant Nutrition, 36 (12). pp. 1809-1820. ISSN 0190-4167