EASY
8th Foundation
IMPORTANT
Earn 100

Which of the following statements are correct?
(i) Cochineal insect is used to eliminate Opuntia.
(ii) Water logging decreases the amount of salts in the soil that increases soil fertility.
(iii) Fertilisers are not readily soluble in water, so they are absorbed by the plants slowly.
(iv) Rust of wheat is a fungal disease.
(v) The practice of growing two or more dissimilar crops in the same field one after the other is called mixed cropping.

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Important Questions on Crop Production and Management

EASY
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 1 - Crop Production and Management>EXERCISES>Q 17
The cutting and gathering of the crop after it is matured is called X. After this, grains are separated from the crop by a process called Y. Z is the process of separating the hay and chaff from the grains. Which of the following statements is/are correct regarding X, Y and Z?
HARD
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 1 - Crop Production and Management>EXERCISES>Q 18
A few healthy gram seeds are placed in each of the three pots X, Yand Z containing same type of soil. The soil in pot X is mixed with some green leaves. The soil in pot Y is mixed with old cow dung while soil of pot Z is mixed with urea. Pots are watered regularly and given proper environment for plant-growth. Which of the following will be observed after 10 days?
EASY
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 1 - Crop Production and Management>EXERCISES>Q 19
The different steps of agricultural practices are given below randomly.
(i) Irrigation
(ii) Ploughing
(iii) Weeding
(iv) Levelling
(v) Harvesting
(vi) Fertilisers
(vii) Sowing
(viii) Crop protection
(ix) Storing seeds
Which of the following represents the correct sequence of these practices?
EASY
8th Foundation
IMPORTANT
NSO Science Olympiad Workbook Grade 8>Chapter 1 - Crop Production and Management>EXERCISES>Q 20
The semi-arid plains of a particular region show a pattern of alternating yellow and black stripes on the ground. The yellow stripes consist of land covered by ripening wheat. The black stripes are bare soil on which no crop is grown but, farmers use herbicides or tillage to remove any weeds that try to grow in that region. Why do farmers in this region manage soils in this way?