Fertilizers and Pesticides

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

Q.

Nitrogen, Phosphorus, Potassium are examples of

1. micro-nutrients

2. macronutrients

3. fertilizer

4. both (a) and (b)

Q.

Which one of the following is not a weed?

1. Xanthium

2. Amaranthus

3. Chenopodium

4. finger millet

Q. Question 14
Wheat dough if left in the open, after a few days, starts to emit a foul smell and becomes unfit for use. Give reason.

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.

In the following picture, chemicals are being sprayed on the paddy fields to kill the weeds. Such chemicals that kill weeds are known as weedicides.

1. False

2. True

Q.

Name the substance which has been traditionally used as manure in our country.

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.

Which one of the following is a biofertilizer?

1. VAM

2. Sporeine

3. Devine

4. Agent orange

Q.

Which of the following is NOT a biopesticide?

1. Neem Cake

2. Tobacco Decoction

3. Bacterial Culture

4. DDT

Q. Undesirable plants growing along with the crops are termed as _____ .

1. Legumes
2. Weeds
3. Fruits
4. Hybrids

Q.

Identify the correct statement/statements.

(I) Pesticides are sprayed on fruits and vegetables to prevent pest and insect attacks.

(II) Pesticides, if consumed, can cause serious health problems.

1. Both (I) and (II)
2. Only (I)
3. Neither (I) nor (II)
4. Only (II)

Q. Chemicals used to kill the weeds are .

1. weedicides
2. insecticides
3. fungicides

Q.

Which of the following items can be included as agricultural waste?

1. Plant material

2. Pesticides

3. herbicides

4. Manure

Q. In integrated farming, cattles are fed with ____ obtained from plants and plants are given with ____ obtained from the cattle.

1. fodder, weed
2. compost, fodder
3. compost, weed
4. fodder, manure

Q. Which of the following is used to kill pest that feed on roots of a plant?

1. Tobacco decoction
2. Weedicide
3. Herbicide
4. Neem oil immersion

Q. Why are manures and fertilizers added to the soil in a farm?

Q. Identify the main ingredient in the biopesticide that removes sap sucking insects from the plant.

1. Neem
2. Tulsi
3. Eucalyptus
4. Tobacco

Q.

Select the appropriate measures that can be taken to control mosquitoes.

1. That causes disease
2. That does not cause disease by itself
3. Spreads the disease from one host to another
4. None of the above

Q.

Manure enhances the _______ of the soil.

1. Strength

2. Texture

3. Fertility

4. Vigour

Q.

Excessive use of chemicals in agriculture can be poisonous.

1. True

2. False

Q. The purpose of imagery in the passage is to convey ________.

1. Lin's interest in his environment
2. Lin's disappointment with his environment
3. a sense of Lin's rural surroundings and life
4. that Lin and Shuyu had moved to a place with better prospects

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. 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. In which respect are manures better than fertilisers?

Q.

Which of the following is a synthetic source of nutrients?

1. Fertiliser

2. Vermicompost

3. Farmyard manure

4. Compost

Q.

The common biofertiliser used in organic farming is:

1. Margosa

2. Pyrethrum

3. Cyanobacteria

4. Nitrogen-fixing bacteria

Q.

To increase soil fertility, the organic substances obtained from the decomposition of animal wastes are added. This is known as __.

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