Class 8 science chapter 1 question 27-30

27. Question
Name one crop which can tolerate standing water (water-logging) in
the ϐield and one which cannot.
Answer
Paddy crop (rice crop) can tolerate standing water in the ϐield whereas
crops like wheat, gram cannot.
28. Question
Which is the best time for the removal of weeds?
Answer
The best time for the removal of weeds is before they produce ϐlowers
and seeds.
29. Question
Name two methods of irrigation with conserve water.
Answer
(i) sprinkler system (ii) Drip system
30. Question

Fill in the following blanks:

(a) The same kind of plants grown and cultivated on a large scale at a
place is called ………………….
(b) The ϐirst step before growing crops is ......._........of soil.
(c) For growing a crop, sufϐicient sunlight, .........., and ............. from the soil
are essential.
(d) Damaged seeds would ........... on top of water.
(e) Crop rotation helps in the replenishment of soil with ..............
(f) The supply of water to crops at different intervals is called ..............
(g) The unwanted plants present in a crop ϐield are called...............
(h) Dried..............leaves are used for storing food grains at home.
(i) Many people living in the ..........areas consume ϐish as a major part of
their diet.
Answer
(a) crop (b) preparation (c) nutrients; water
(d) ϐloat (e) nitrogen (f) irrigation
(g) weeds (h) neem (i) coastal

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