A mathematical model for predicting the soil nitrogen status under varying fertilizer practices in a continuous cropping sequence |
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Authors: | P Muthuswamy C R Ranganathan V Murugappan P Santhy G Ramanathan |
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Affiliation: | (1) Centre for Soil and Crop Management Studies, Tamil Nadu Agricultural University, 641 003 Coimbatore, India |
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Abstract: | A mathematical model has been proposed for predicting the changes in soil nitrogen status due to continuous fertilization in a continuous cropping sequence. The model also enabled the prediction of the steady state of soil nitrogen for a specified fertilizer practice.The model was applied to six years nitrogen availability data of four fertilizer practices in finger millet-maize-cowpea sequence followed in the Long Term Fertilizer Experiments conducted at Tamil Nadu Agricultural University, Coimbatore, India. The agreement between the predicted soil nitrogen status by the model and the actuals was proved by employing reliability index. |
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Keywords: | Vertisol soil continuous fertilization intensive cropping mathematical model soil nitrogen status |
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