A farmer wanted to test the best way to grow tall lemon trees. Two groups of lemon trees were planted in a grove. One group of lemon trees was watered daily and the other group was watered twice a week.

The group of lemon trees that was watered twice a week grow taller.

Explanation:

The group of lemon trees that was watered twice a week grow taller as compared to other group in which lemon trees was watered daily because too wet condition for the lemon tree is bad and can adversely affected its growth and development. Lemon tree needs optimum water for its growth and development. Too much water or drought condition adversely affected the growth of lemon tree which leads to lower height of the lemon tree.