Nutrition

Fruit size can be increased by treating the soil with boron. It helps in translocation of sugar in the plants through the phloem. If the fruit size is not increasing, it means that carbohydrates are not translocated.

For the proper growth of plants some elements are essentially required, these are known as elements. Calcium is used for the synthesis of cell wall. Deficiency of calcium leads to stunted growth and necrosis of root tips and young leaves. Potassium deficiency causes scorched leaf tips, shorter internodes and chlorasis in inter-veinal areas. Deficiency of copper shows necrosis of the tips of young leaves. While, phosphorus deficiency causes premature leaf falling.

Answer (c) Boron

Answer (a) Pseudomonas