DENDROLOGY

Detailed explanation-1: -Without nitrates, the amount of chlorophyll in leaves reduces. This means leaves turn a pale green or yellow colour. This reduces the plant’s ability to photosynthesise and grow properly, which reduces the farmers’ crop yield .

Detailed explanation-2: -Excessive irrigation and heavy rains cause nitrogen deficiency due to overwatering. A lack of soil moisture tampers with the absorption of water-soluble nutrients by plant roots.

Detailed explanation-3: -Calcium (Ca) Calcium is needed by plants to produce new growing points and root tips. Deficiency symptoms: New foliage, buds and roots have stunted growth.

Detailed explanation-4: -Nitrogen deficiency is a deficiency of nitrogen in plants. This can occur when organic matter with high carbon content, such as sawdust, is added to soil. Soil organisms use any nitrogen available to break down carbon sources, making nitrogen unavailable to plants. This is known as “robbing” the soil of nitrogen.