How was the zamindari system of land settlement responsible

How was the zamindari system of land settlement responsible for the stagnation of Indian agriculture?

The zamindari system of land settlement was responsible for the stagnation of Indian agriculture because of the below mentioned reasons
(i) The zamindars were recognised as permanent owners of the soil.
(ii) The zamindars were to pay a fixed sum to the government as land revenue.
(iii) The zamindars were absolutely free to extract as much from the tillers of the soil as they could.