Give reason for the following:
a) excess water supply can damage crops
b) overuse of pesticides should be avoided
Answers
The field will get water logged and the crop cannot get sufficient water and air, as good aeration and warmth in the root zone are essential for proper plant growth.
a) Bacteria that change organic matter into plant foods cannot get necessary air and warm temperature in the soil.
Desirable chemical reactions cannot take place and nutrient availability is not easily to the plants.
Proper root development and absorption of nutrients is not accelerated.
Seed germination is affected due to poor aeration and warm temperature.
Plants affected by diseases and pest attack.
b) Over use of pesticides do not affect only the pests but also heavyly affects the crops which can lead to lots of diseases in plants which can damage the field
a)Excess water supply can damage crops because it will decay the roots
b)Overuse of pesticides on plants which human and animals intake will damage the digestive organs and even causes cancer. The pesticides make there ways to water bodies causing death to aquatic animals and plants. It also cause algal bloom