Question

Figure 15.1 shows two crop fields [plots A and B] have been treated by manures and chemical fertilizers respectively. Keeping other environmental factors same. Observe the graph and answer the following question​
(i) Why does plot B show sudden increase and then gradual decrease in yield?​

Answer 1

• Plot B in the given graph shows a sudden increase due to the presence of the chemical fertilizer. ​

• The chemical fertilizer for a short period of time provides high nutrients to the crops.​

• These fertilizers are chemical inexpensive and promote the growth of crop yields. ​

• After some times, the crop yield gets reduced because the negative toxic effect of the crops affects the soil fertility and the crop yield.​