8th Grade > Biology
CROP PRODUCTION AND MANAGEMENT MCQs
Total Questions : 51
| Page 4 of 6 pages
Answer: Option D. ->
The bacteria present in the roots fix nitrogen.
:
D
Roots of pulses (leguminous plants) have a symbiotic association with a bacterium called rhizobium, which fixes atmospheric nitrogen into the soil. Adding more nitrogenous fertilizers make the level of nitrogen in the soil too much for the crops. Hence, farmers need not use nitrogenous fertilizers.
:
D
Roots of pulses (leguminous plants) have a symbiotic association with a bacterium called rhizobium, which fixes atmospheric nitrogen into the soil. Adding more nitrogenous fertilizers make the level of nitrogen in the soil too much for the crops. Hence, farmers need not use nitrogenous fertilizers.
Answer: Option C. ->
Mustard
:
C
:
C
Crops which are grown during the rainy season are called kharif crops. Paddy (rice), millets and cotton are examples of kharif crops. On the other hand, crops grown during the winter season are called rabi crops. Rabi crops include wheat, gram, and mustard.
Answer: Option C. ->
(ii) and (iv)
:
C
:
C
Traditional methods of irrigation, such as moat and chain pump, are useful only in plains where the terrain aids the flow of water into the fields. However, both sprinkler and drip system of irrigation are very efficient even in an uneven land.
Answer: Option B. ->
5 → 2 → 4 → 1 → 3
:
B
In basic agricultural practice, the first step is to prepare the soil for crop. This step includes tilling or ploughing. Once the soil is well prepared, sowing is done. After sowing, continuous water supply for crop growth is provided by irrigation. When the crops are ripe, they are harvested and the grains obtained are stored for further use.
:
B
In basic agricultural practice, the first step is to prepare the soil for crop. This step includes tilling or ploughing. Once the soil is well prepared, sowing is done. After sowing, continuous water supply for crop growth is provided by irrigation. When the crops are ripe, they are harvested and the grains obtained are stored for further use.
Answer: Option A. ->
True
:
A
Weeds are unwanted plants which grows along with the crop and compete for nutrients, sunlight and water. The process of removal of weeds is called weeding. It can be done manually by hands or by using chemicals called weedicides.
Elimination of weeds results in an improved crop production.
:
A
Weeds are unwanted plants which grows along with the crop and compete for nutrients, sunlight and water. The process of removal of weeds is called weeding. It can be done manually by hands or by using chemicals called weedicides.
Elimination of weeds results in an improved crop production.
Answer: Option A. ->
True
:
A
:
A
Dried neem leaves are used for the storage of food grains at home as they have antimicrobial properties and a characteristic odour that keeps pests away.
Answer: Option A. ->
True
:
A
Animal husbandry is a part of agriculture in which animals are reared for milk, meat, eggs or other products. They are provided with proper food, shelter and care to ensure maximum yield.
:
A
Animal husbandry is a part of agriculture in which animals are reared for milk, meat, eggs or other products. They are provided with proper food, shelter and care to ensure maximum yield.
Answer: Option A. ->
Plough
:
A, B, and C
:
A, B, and C
The process of loosening or turning the soil is termed as tilling or ploughing.
∙ A plough is an ancient wood tool used to loosen soil, remove weeds and to add fertilisers.
∙ A hoe is a tilling tool, made up of a long rod of wood or iron, with a strong, broad and bent iron plate attached at one end.
∙ Nowadays, tilling is also done with tractor driven cultivators, which are more efficient.
Answer: Option A. ->
Statement 1 is true and statement 2 and 3 are the correct implications of statement 1.
:
A
Poultry in India is the most efficient converter of low, fibre-rich foodstuff into highly nutritious animal protein food. In poultry farming, domestic fowls are raised to produce eggs and chicken. For this, the fowls are given animal feeds in the form of roughage, which mainly consists of fibres. Thus, by feeding animals a fibre rich diet, the poultry gives highly nutritious food in the form of eggs and chicken.
:
A
Poultry in India is the most efficient converter of low, fibre-rich foodstuff into highly nutritious animal protein food. In poultry farming, domestic fowls are raised to produce eggs and chicken. For this, the fowls are given animal feeds in the form of roughage, which mainly consists of fibres. Thus, by feeding animals a fibre rich diet, the poultry gives highly nutritious food in the form of eggs and chicken.
Answer: Option B. ->
Vermicompost, poultry wastes, green manure
:
B
Organic manures are of plant or animal origin. They are not synthetic chemicals. Excessive use of chemical fertilizers lead to problems such as saline soil and barren lands. It also causes pollution of underground water. Hence the use of organic manures is recommended as it increases the fertility of soil naturally. Cow dung, vermicompost, bone meal, goat droppings, poultry wastes, green manure are few examples of organic manures. NPK fertilizers, phosphate fertilizers, urea are few examples of chemical fertilizers.
:
B
Organic manures are of plant or animal origin. They are not synthetic chemicals. Excessive use of chemical fertilizers lead to problems such as saline soil and barren lands. It also causes pollution of underground water. Hence the use of organic manures is recommended as it increases the fertility of soil naturally. Cow dung, vermicompost, bone meal, goat droppings, poultry wastes, green manure are few examples of organic manures. NPK fertilizers, phosphate fertilizers, urea are few examples of chemical fertilizers.
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