Fertilizers and Pesticides

Q.

Pesticides are the chemicals usually sprayed for killing pests on the crops. Although they kill the pests, they have a few disadvantages. Choose the correct ones.

1. Pesticides are poisonous for the plants.

2. Pesticides pollute soil.

3. Pesticides are harmful for human consumption.

4. Pesticides work only in suitable weather.

Q. The farming technique in which there is no or minimal use of chemical fertilisers, herbicides and insecticides, is called ______.

1. organic farming
2. mixed farming
3. synthetic farming
4. artificial farming

Q.

Manure enhances the _______ of the soil.

1. Strength

2. Texture

3. Fertility

4. Vigour

Q. Ram wants to enrich soil with nutrients for his plants. Suggest the correct group of plant nutrients he should add that does not cause water pollution.

1. NPK fertilizer, green manure, goat droppings
2. Urea, cow dung, NPK fertilizer
3. Vermicompost, poultry wastes, green manure
4. Bone meal, fish manure, phosphate fertilizer

Q.

_________ is used to avoid the disadvantages of chemical fertilizers.

1. Organic farming

2. Pesticide

3. Nitrogen

4. Inorganic farming

Q. 'X' is a source of nutrients for plants. It is prepared by the decomposition of plant waste and animal excreta. Given below are few uses of X. Identify the one which is not a use of X.

1. It increases soil microflora.
2. It increases soil fertility.
3. It prevents weathering of rocks.
4. It increases water holding capacity.

Q.

Which of the following is NOT a biopesticide?

1. Neem Cake

2. Tobacco Decoction

3. Bacterial Culture

4. DDT

Q.

Which of the following method(s) can be used to control the growth of weeds in the fields?

1. Lagoons

2. Estuaries

3. Rivers

4. All of these

Q.

Compost prepared by turning farm wastes including animal wastes into manure using earthworms is called vermicompost.

1. False

2. True

Q.

Traditionally, dried neem leaves are mixed with the grains during their storage. Here, the neem leaves act as________

Neem Leaves

1. Bio-insecticide

2. Chemical insecticide

3. Bio-fertilizer

4. Flavour enhancer