The productivity in the Indian agriculture has stagnated since 1990’s although the usage of fertilizers has considerably increased since then.
What is/are the possible reason/s increase in the productivity cannot come through increase in the usage of fertilizers.
Unscientific usage of fertilizers.
Agriculture productivity in India has reached a zenith position and any further
Increasing monsoon vagaries because of Climate Change.
Both 1 and 3.
Explanation:
Unscientific usage is the main reason ie unbalanced dosage of nitrogen, phosphorous,potassium. In the ideal condition it should be 4:2:1. But in India it is completely unbalanced .Based on region the ratio of N:P:K varies in a big way eg: all India it is 8.2:3.2:1, for Punjab itis 61.9:19.3:1, for Haryana it is 61.4:18.7:1. This can have negative impact like decreasingthe soil fertility and thus reducing the yield. Monsoon vagaries definitely has increased withtime.
Unscientific usage is the main reason ie unbalanced dosage of nitrogen, phosphorous,potassium. In the ideal condition it should be 4:2:1. But in India it is completely unbalanced .Based on region the ratio of N:P:K varies in a big way eg: all India it is 8.2:3.2:1, for Punjab itis 61.9:19.3:1, for Haryana it is 61.4:18.7:1. This can have negative impact like decreasingthe soil fertility and thus reducing the yield. Monsoon vagaries definitely has increased withtime.