Nutrient Management

Q.

Explain how fertilizer different from manure?

Q.

What are essential mineral and non-mineral plants elements?

Q.

In the symbiotic relationship between a bacteria and leguminous plant, which of the following statements is true?

1. Bacteria provide $N_2$ and the plant roots provide Carbon
2. Roots provide $N{H}_4$ and bacteria provide Carbon
3. Bacteria provide $N{H}_4$ and the roots provide Carbon
4. Bacteria provide $N_2$ and the roots provide $N{H}_4$

Q.

Why Is Capillary Water Important?

Q.

A pulse crop is grown between two cereal crops to compensate for the loss of :

1. loss of phosphate

2. loss of water

3. loss of sulphur

4. loss of nitrogen

Q.

Wilting of plants occur when

1. Phloem is blocked

2. Xylem is blocked

3. Both Xylem and Phloem are blocked

4. A few old roots are removed.

Q.

Name three most important nutrients required for plant growth.

Q.

Which of the following elements can be obtained by plants directly from air?

1. Carbon
2. Boron
3. Calcium
4. Iron

Q.

Minerals known to be required in large amounts for plant growth include: -

1. Potassium, Phosphorus, Selenium, Boron

2. Calcium, Magnesium, Manganese, Copper

3. Magnesium, Sulphur, Iron, Zinc

4. Phosphorus, Potassium, Sulphur, Calcium

Q.

The method of preparing compost with the help of earthworms is called

1. Composting

2. Vermicomposting

3. Manuring

4. Decomposing

Q.

Which of the following is a macronutrient in plant?

1. Iron

2. Nitrogen

3. Manganese

4. Zinc

Q.

Name the term used for the water present in the soil which is available for plants.

Q.

Which of the following is not true for fertilisers?

1. They increase the yield.

2. Their excessive use disturbs the balance of nutrients in soil.

3. They are generally used in small quantities.

4. They are environmentally friendly.

Q. Which of the following statements about Mycorrhizae is/are incorrect?

1. Plants provide food for fungi
2. Fungi and plants establish a symbiotic relationship
3. Fungi provide water for plant growth
4. Fungi feeds on the roots of the plants and survives

Q.

Which process involves use of earthworms in preparing manure?

1. Vermicomposting

2. Manuring

3. Green Manuring

4. All of these

Q.

What is the role of chemistry in a) agriculture b) Food industry.

Q.

Question 36
Following are a few organisms:

(a) lichen
(b) mosses
(c) mango tree
(d) cactus

Which among the above can grow on stones; and also help in the formation of soil? Write the mode of their action for making soil.

Q.

What are plant nutrients ?

Q. Plants get carbon and oxygen from air.

1. True
2. False

Q.

What is irrigation?

1. Supply of water to households

2. Removing water from crops

3. Supply of water to factories

4. Channeling water from rivers for agriculture

Q.

Classify nutrients according to their sources.

Q. Question 2
How do plants get nutrients?

Q.

Identify the statement as true/false:

Zinc is a micronutrient.

1. True
2. False

Q.

Fertilizers are used to supply nutrients to the soil and to keep fertility manures healthy. True or False?

1. False

2. True

Q.

With respect to the following statements, choose the correct answer.
i.Food security depends on both, the availability of food and access to it.
ii.Mixed farming degrades the nutrient quality of the soil.
iii.Fertilisers are commercially produced plant nutrients.

1. Only statement (ii) is correct
2. Only statement (ii) is incorrect
3. Statement (i) and (ii) are correct
4. Only statement (iii) is correct.

Q.

Advantages of manures

Q. Why is irrigation necessary in India?

Q.

Why are manures and fertilizers used in fields? [3 MARKS]

Q.

State the difference between manure and fertilizer.

Q. What is meant by 'irrigation'? Name the main crops grown under irrigation.