Why India cannot increase the area of cultivable land?

How is green revolution different from white revolution?

Classify the following crops as Rabi and Kharif:

Paddy, Wheat, black gram, cotton, gram and peas.

Identify the cross performed between two plants belonging to different species.

Name three factors for which crop variety is improved.

Name the nutrients provided by air and water.

Micronutrients are required by plants in smaller quantities. From the list given below, select only micronutrients required by plants.

N, P, K, Ca, Mg, S, Zn, Cu, Mb and Cl^–

Why some plants like sunhemp or guar and grown and mulched by ploughing into the soil before sowing of the crop seeds?

In agricultural practices, instead of fertilizers, manures should be commonly employed. Give one reason.

Organic farming is an environment friendly farming system. Mention one advantage supporting the above claim.

Give any one advantage of irrigation.

Define drought.

Name the type of irrigation system used where the canal system is insufficient.

Give two examples of mixed cropping.

What do you understand by crop rotation?

Name two factors that can cause heavy damage to crops.

Name any two weeds.

List any two pest control measures.

What factors are responsible for the losses during storage of grains?

For proper storage of grains what measures can be adopted?

What purpose does animal husbandry fulfills?

Why are indigenous breeds of cattle selected for cattle farming?

Name one external and one internal disease caused due to parasites in cattle’s.

Name an India and a foreign breed of poultry.

How poultry birds are prevented from diseases? Suggest any two.

Name two most popular marine fishes.

As a part of fishery industry, why oysters are also cultivated?

Why composite fish culture is a preferred method of fish culture? Give one reason.

What is the term used for bee farms?

Give the scientific name of the following:

(i) Little bee

(ii) Rock bee

Name the inorganic substances, which a plant absorbs from the surrounding.

Name two macronutrients of plants.

Name a farming system with minimal or no use of chemical fertilizers.

Write the factors on which irrigation requirements depend.

Which crop is generally grown between the cultivation of two cereal crops to restore the fertility of soil?

Why are Jersey and Brown Swiss popular cattle breeds?

What is common in poultry, fisheries and bee-keeping with respect to the increase in production of animals?

What is green manure?

Why is a chemical method of controlling pests not considered good?

What is the basic objective of crop rotation?

Why is proper cleaning and sanitation required in the shelter of animals?

How can poultry and fish farming help in solving the food and nutrition problem?

Farmers use bee-keeping as an additional income generating activity. Give two reasons.

What were the reasons behind the occurrence of green and white revolutions?

Explain the need of irrigation in India.

Write the factors for selecting crops for mixed cropping, as well as intercropping.

In last few decades, the production of food from animal sources has increased. Justify this statement.

A farmer wants to improve the cattle for getting higher yield and increased resistance to diseases. Name the method he should adopt to get animals of desired qualities. Illustrate it for the cows.

What is bee-keeping? Which variety of bee is commonly used for commercial honey production?

Differentiate between pathogens and pests. How does an insect-pest attack the plants?

Explain composite fish culture system with examples. State the major problem associated with this system. Can fish culture be done in any type of combination? If yes, explain.

(i) What are the common names of Apis dorsata, Apis florae and Apis cerena indica?

(ii) Name one Italian bee variety. Also, justify the use of the Italian bee for honey production giving two reasons.

(iii) State one factor, which affects the quality of honey produced.

There is a water reservoir (river) near a village. Due to insufficient rain, farmers are worried about their crops. Suggest and explain the irrigation practice that can be adopted to supply water to the entire agricultural land in the village.

A farmer is advised to use manure instead of fertilizer in his fields. List any two advantages that the farmer will get if he accepts this advice. How is the use of manure particularly useful for clayey and sandy soil?

Mention any two desirable agronomic characters for crop improvement. Explain how farmers get desired characters incorporated into the new varieties produced. List two conditions necessary for the new varieties to be accepted.

A group of eco-club students made a compost pit in the school. They collected all biodegradable waste from the school canteen and used it to prepare the compost.

(i) Name two wastes that can be used for compost and two wastes that cannot be used for compost.

(ii) What values of eco-club students are reflected this act?

Rakeh visited a fish farm and saw that a combination of five or six species of fishes is present in the single pond.

(i) Name the type of farming observed by Rakesh.

(ii) Mention the advantage of using such farming.

(iii) What are the values shown by Rakesh?

Which one of the following is a micronutrient for the crop plants?

Pusalerma is an improved variety of

Growing two or more crops in definite row pattern is

‘Organic farming’ does not include.

The common biofertilisers used in organic farming are

Maximum milk yielding breed of buffalo is

The principal cereal crop of India is

Fill in the blanks by choosing correct option from the following

I. Puccinia causes ………. disease in wheat.

II. Blast is a …………. disease of paddy.

III. Chemical used to kill weeds are called ……… .

IV. Pesticides are ………… chemicals.

Choose the correct option.

Match the following columns and choose the correct option from the codes given below:

Match the following and choose the correct option from the codes given below.