IMPROVEMENT IN FOOD RESOURCES- important questions
- To solve the food problem of the country, which among the following is necessary?
(a) Increased production and storage of food grains.
(b) Easy access of people to the food grain.
(c) People should have money to purchase the grains.
(d) All of the above - A farmer in town X changed the cropping pattern of the farm. Earlier the farm had only soyabean
but then the farm was divided into rows of different crops. Two rows of soyabean and alternate
two rows had maize and the next two had cowpea. What would be the most likely effect of the
new cropping pattern?
(a) Increase in yield
(c) Increased growth of weeds
(b) Degradation of land
(d) Reduced intake of nutrients by crops - A crop X is to be grown in a field. It is seen that Parthenium, a type of weed usually affects crop
X. What measure would help to protect crop X from Parthenium?
(a) Spraying pesticides
(b) Avoiding crop rotation
(c) Burning the field before sowing the crop
(d) Delaying the sowing of crops by a few days - Which of these would make a crop resistant to biotic stresses? [CBSE Question Bank]
(a) Using insecticides to kill insects and other pests.
(b) Developing crop varieties that are tolerant to high soil salinity.
(c) Developing crop varieties that can grow in scarce water conditions.
(d) Growing crops in artificial set ups with fixed temperature and moisture content. - A soil sample has adequate water holding capacity but is deficient in phosphorous and
potassium. Which of these would improve the quality of crops grown in that field?
(a) Removing weeds
(b) Applying fertilisers
(c) Modifying irrigation system
(d) Growing two different crops at the same time - Crop Y is grown only in few areas due to specific temperature requirements. To increase the
productivity of crop Y, it is recommended to develop its different varieties. Which feature should
be included while developing the different varieties of crop Y in order to increase its
productivity?
(a) Developing varieties with strong biotic resistance.
(b) Developing varieties with less dependence on water.
(c) Developing varieties with extended maturity duration.
(d) Developing varieties adaptable to different climatic conditions.
In the following questions 9 and 10, a statement of assertion (A) is followed by a statement of
Reason (R). Choose the correct answer out of the following choices.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true and R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true. - Assertion (A): Some weeds produce substances toxic for the crops.
Reason (R): Chenopodium is a toxic weed.
10. Assertion (A): Fungicides and pesticides increase crop output.
Reason (R): Manure and fertilizers produce chemicals that improve soil fertility. - Cultivation practices and crop yield are related to environmental condition. Explain.
OR
Which method is commonly used for improving cattle breed and why? - What are macronutrients and why are they so called?
- How do biotic and abiotic factors affect crop production?
OR
What factors may be responsible for losses of grains during storage? - Why should preventive measures and biological control methods be preferred for protecting
crops? - (a) Why should preventive methods and biological control methods be preferred for protecting
crops?
(b) Name the farming system in which only such above mentioned methods are followed.
(c) How does manure improve the soil structure of sandy and clayey soil? - What is genetic manipulation? How is it useful in agricultural practices?
OR
Enumerate the advantages of mixed farming. - What are the advantages of intercropping and crop rotation?
OR
Discuss why pesticides are used in very accurate concentration and in very appropriate manner. - Why is crop variety improvement important in cultivation? Describe the important factors for
which variety improvement is done.
OR
What are weeds? Enlist the methods employed to control weeds.
