What are various symptoms of deficiency in plants?

5

(a)

Explain with examples macronutrients,micronutrients,beneficial nutrients,toxic elements and essential elements.

5

(a)

Hydroponics have been shown to be a successful technique for growing of plants, yet most of the crops are still grown on land. Why?

5

(a)

Name at least five different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.

5

(a)

How are the minerals absorbed by the plants?

5

(a)

What are the steps involved in formation of a root nodule?

5

(a)

What are essential elements for plants? Give the criteria of essentiality? How are minerals classified depending upon the amount in which they are needed by the plants?

5

(a)

What are main essential elements and what is their role in plants?

5

(a)

With the help of suitable diagram describe nitrogen cycle

5

(a)

Describe toxicity of micronutrients.

5

(a)