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Multiple choice questions.
(1) Which are the factors considered to get more yield ?
a) Fertile soil
b) Favourable climate
c) Quality seeds and planting materials
d) All the above.
(2) Layering is effective in plants like
a) Jasmine
b) Rose
c) Hibiscus
d) All the above
(3) The rooted plant selected for grafting is called
a) Stock
b) scion
c) None of the above
(4) The branch selected for grafting is called
a) Stock
b) scion
c) None of the above
(5) Hybrid variety coconut tree (which are true)
a) Chandralaksha – Lakshadweep ordinary × Chavakkad orange (T×D)
b) Chandrasankara – Chavakkad orange × West coast tall (D×T)
c) Lakshaganga – Lakshadweep ordinary × Gangabondam (T×D)
d) All the above
(6) What should be made possible in the agricultural sector?
a) High yield
b) Quick yield
c) Resistance to infections
d) Lower nurturing costs
e) Availability of quality seeds/planting materials
f) All the above
(7) Which are Leguminous plants?
a) pea
b) mimosa
c) black gram
d) All the above
(8) Which are fibre crops?
a) cotton
b) jute
c) both
d) none
Questions and answers.
(1) What is hybridisation?
ANS: Hybridisation is the method of producing new seeds through artificial pollination between plants of the same species but of different characteristics.
(2) What is tissue culture?
ANS: Tissue culture is the process of producing a new generation from a cell or tissue of a plant.
(3) What is the benefit of depositing plant debris in the field after cultivation?
ANS: The nutrients provided by one kind of plant debris is not the same supplied by another. The more diverse the plant debris that decomposes in the soil, the higher the fertility of the soil.
(4) What is Intercrop?
ANS: Short term crops cultivated among the main crop in such a way that they do not harm the main crop are called intercrops.
(5) What is Crop Rotation?
ANS: Cultivating a different crop instead of the crop cultivated earlier is called crop rotation.
(7) Which are biofertilizers?
ANS: Cow dung ,Green manure ,Compost manure ,Fish manure ,Poultry droppings ,Goat droppings ,Bone meal.
SHORT ANSWER QUESTIONS.
(1) How plants gets nitrogen?
ANS: Nitrogen is an essential element for plant growth. Plants cannot absorb atmospheric nitrogen directly, but they absorb the nitrate salts dissolved in water. Some of the bacteria can convert atmospheric nitrogen to nitrate. Rhizobium is one such bacterium.
(2) Which are Agricultural Research Institutes in our State?
ANS: Kerala Agricultural University (KAU) – Mannuthi, Thrissur
Central Tuber Crops Research Institute (CTCRI) –Sreekaryam, Thiruvananthapuram
Indian Institute of Spices Research (IISR) – Kozhikode
Rubber Research Institute of India (RRII) – Kottayam
Central Plantation Crops Research Institute (CPCRI) – Kasaragode
Regional Research Centres of Kerala Agricultural University
(3) What is process of Layering?
ANS:1) Select a branch of the plant from which sapling is to be produced. The branch must be pencil thick. The branches from the main stem are better. Peel off one centimetre of bark from the stem in a circular shape.
2) Cover the peeled off part with a slightly moistened mixture of coconut fibre, soil and sawdust.
3) Cover it with a polythene sheet. Tie both ends with jute twine. Wet it with enough water to retain moisture.
4) Numerous roots will sprout within two months. Cut the branch and plant it in a pot, till it is ready to be transplanted in the soil.
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