Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi, 110012.
* Present address: Division of Chemistry, (Soil Science), Central Tobacco Research Institute, Rajahmundry, Andhra Pradesh, 533 105.
In maize and wheat crops, grown in a sequence fertilizers were applied according to targeted yield approach. Soil samples (0-15cm) were collected before sowing of each crop and analysed for available N, P, K and S. Post-harvest soil test values after individual crops and also after cropping sequence were predicted with grain yield, initial soil test values and fertilizer doses applied. Correlations showed that there was a close agreement between actual and predicted soil test values of available N, P, K and S after the individual crops and also after the cropping sequence. These predictions will enable in formulating fertilizer recommendations for cropping sequence based on initial soil test values and will also improve the over all fertilizer use efficiency.
Prediction of soil test values, post-harvest soil test values, cropping sequence, fertilizer recommendation, available nutrients
