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Crop Production and Management — Class 8 CBSE Science MCQs with Solutions
Free Class 8 CBSE Science Crop Production and Management MCQs with step-by-step solutions covering Agricultural practices, Preparation of soil & sowing, Irrigation, Harvesting & storage. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — Agricultural practices · easy · theory
What is meant by a 'crop'?
A. Plants of the same kind cultivated at one place on a large scale ✓ Correct
B. Any wild plant growing on its own in a forest
C. Undesirable plants growing along with cultivated plants
D. Animals reared for food on a large scale
Solution: A crop is plants of the same kind grown together at one place on a large scale.
Q2 — Agricultural practices · easy · theory
Which of the following is a kharif crop?
A. Paddy ✓ Correct
B. Wheat
C. Gram
D. Mustard
Solution: Paddy is sown in the rainy season (June-September), making it a kharif crop; wheat, gram and mustard are rabi crops.
Q3 — Agricultural practices · easy · theory
Which of these is a rabi crop grown in the winter season?
A. Wheat ✓ Correct
B. Maize
C. Soyabean
D. Cotton
Solution: Wheat is grown in the winter season (October-March), making it a rabi crop; maize, soyabean and cotton are kharif crops.
Q4 — Agricultural practices · easy · theory
Manure is best described as:
A. An organic substance obtained from the decomposition of plant and animal waste ✓ Correct
B. A chemical salt manufactured in factories
C. A chemical sprayed on crops to kill weeds
D. A machine used for cutting the mature crop
Solution: Manure is organic, formed by the decomposition of plant and animal waste by microorganisms.
Q5 — Agricultural practices · easy · theory
Rearing animals on a large scale with proper food, shelter and care is called:
A. Animal husbandry ✓ Correct
B. Crop rotation
C. Irrigation
D. Threshing
Solution: Rearing animals on a large scale with proper food, shelter and care is known as animal husbandry.
Q6 — Agricultural practices · easy · theory
The fertiliser 'NPK' supplies which three nutrients?
A. Nitrogen, Phosphorus and Potassium ✓ Correct
B. Nitrogen, Phosphorus and Calcium
C. Nickel, Phosphorus and Potassium
D. Nitrogen, Potassium and Carbon
Solution: NPK stands for Nitrogen, Phosphorus and Potassium.
Q7 — Preparation of soil & sowing · easy · theory
What is the process of turning and loosening the soil before sowing called?
A. Ploughing (tilling) ✓ Correct
B. Harvesting
C. Threshing
D. Winnowing
Solution: Turning and loosening the soil before sowing is called tilling or ploughing.
Q8 — Preparation of soil & sowing · easy · theory
In a plough, the triangular iron strip that cuts and turns the soil is called the:
A. Ploughshare ✓ Correct
B. Ploughshaft
C. Beam
D. Leveller
Solution: The ploughshare is the triangular iron strip of the plough that cuts and turns the soil.
Q9 — Preparation of soil & sowing · easy · theory
After ploughing, the field is made flat and even (which helps sowing and irrigation) using a:
A. Leveller ✓ Correct
B. Plough
C. Sickle
D. Seed drill
Solution: Levelling of the ploughed field is done with a leveller, which is good for sowing and irrigation.
Q10 — Preparation of soil & sowing · easy · theory
When seeds are put in water during the float test, the damaged seeds usually:
A. Float on the water ✓ Correct
B. Sink to the bottom
C. Sink faster than the healthy seeds
D. Stay suspended in the middle of the water
Solution: Damaged seeds are hollow and lighter, so they float on the water, which separates them from the healthy seeds that sink.
Q11 — Preparation of soil & sowing · easy · theory
The lumps of soil left in the field after ploughing are known as:
A. Crumbs ✓ Correct
B. Chaff
C. Stubble
D. Humus
Solution: The lumps of soil formed after ploughing are called crumbs, and they must be broken before sowing.
Q12 — Irrigation · easy · theory
What is irrigation?
A. The supply of water to crops at regular intervals ✓ Correct
B. The removal of weeds growing along with the crop
C. The loosening of soil before sowing seeds
D. The separation of grain seeds from the chaff
Solution: Irrigation is defined as the supply of water to crops at regular intervals; the other options describe weeding, tilling and threshing.
Q13 — Irrigation · easy · theory
Which of the following is a reason why crops must be supplied with water?
A. Seeds may fail to germinate if the soil is too dry ✓ Correct
B. Water is needed only on the day the crop is harvested
C. Crops grow best when the soil is kept completely dry
D. Water is supplied only to help weeds grow faster
Solution: Crops need water because seeds fail to germinate in dry conditions; water also dissolves and transports nutrients to all parts of the plant and protects the crop from frost and hot air currents.
Q14 — Irrigation · easy · theory
Plants are made up of nearly what percentage of water?
A. 90% ✓ Correct
B. 30%
C. 50%
D. 70%
Solution: Plants are nearly 90% water, which is why a regular supply of water through irrigation is essential.
Q15 — Irrigation · easy · theory
Which of the following is a source of water for irrigation?
A. Wells ✓ Correct
B. Weedicides
C. Silos
D. Ploughs
Solution: Wells, along with tubewells, ponds, lakes, rivers, dams and canals, are sources of irrigation water; weedicides kill weeds, silos store grain and ploughs till soil.
Q16 — Harvesting & storage · easy · theory
In farming, what does the practice called 'harvesting' mean?
A. Cutting the crop after it has matured ✓ Correct
B. Putting seeds into the prepared soil
C. Removing undesirable weeds from the field
D. Supplying water to the crop at regular intervals
Solution: Harvesting is the cutting of a mature crop, either by pulling it out or cutting it close to the ground. Sowing, weeding and irrigation are separate farming practices.
Q17 — Harvesting & storage · easy · theory
What is the process of 'threshing'?
A. Separating the grain seeds from the chaff ✓ Correct
B. Cutting the mature crop with a sickle
C. Loosening and turning the soil with a plough
D. Removing the weeds growing with the crop
Solution: Threshing is the process of separating grain seeds from the chaff, carried out after the crop has been harvested.
Q18 — Harvesting & storage · easy · theory
Which of the following is a harvest festival celebrated in India?
A. Baisakhi ✓ Correct
B. Kharif
C. Rabi
D. Rhizobium
Solution: Baisakhi is a harvest festival, along with Pongal, Holi, Diwali, Nabanya and Bihu. Kharif and Rabi are crop seasons, and Rhizobium is a nitrogen-fixing bacterium.
Q19 — Agricultural practices · hard · theory
Why is paddy grown in the kharif (rainy) season rather than in winter?
A. Because paddy needs a lot of water ✓ Correct
B. Because paddy cannot tolerate any rainfall
C. Because paddy grows only in cold, dry weather
D. Because paddy is actually a rabi crop
Solution: Paddy requires a large amount of water, which the rainy kharif season provides, so it is not grown in the dry winter.
Q20 — Agricultural practices · hard · theory
A farmer wants to improve his soil's texture and water-holding capacity. Which of these should he add?
A. Manure ✓ Correct
B. Urea
C. Superphosphate
D. Potash
Solution: Manure improves soil texture and increases its water-holding capacity, which chemical fertilisers such as urea, superphosphate and potash cannot do.
Q21 — Agricultural practices · hard · theory
In a region where water is very scarce, a farmer wants to water his fruit trees so that almost no water is wasted, delivering it right at the roots. Which method is most suitable?
A. Drip irrigation, in which water falls drop by drop near the roots ✓ Correct
B. Sprinkler irrigation, which sprays water like rain over the whole field
C. Moat, a traditional pulley system for lifting water
D. Flooding the entire field with canal water
Solution: Drip irrigation lets water fall drop by drop directly near the roots so almost no water is wasted, and it is the best method for fruit plants and trees where water is scarce. A sprinkler sprays over the whole field (better for uneven land and lawns), while moat and flooding waste much more water.
Q22 — Agricultural practices · hard · theory
Why is the excessive use of chemical fertilisers discouraged?
A. It makes the soil less fertile and causes water pollution ✓ Correct
B. It adds too much humus to the soil
C. It makes the soil too porous for roots to hold
D. It fixes excess atmospheric nitrogen in the soil
Solution: Overusing chemical fertilisers reduces soil fertility and pollutes water bodies; unlike manure, fertilisers add no humus.
Q23 — Agricultural practices · hard · theory
Weedicides such as 2,4-D are sprayed during vegetative growth, before flowering, because:
A. Weeds should be destroyed before they produce flowers and seeds ✓ Correct
B. Flowering makes the crop itself poisonous
C. Weed seeds float in water only after flowering
D. The weedicide helps the crop flower earlier
Solution: Spraying before flowering and seed formation kills weeds while they are young and stops them from producing seeds and spreading.
Q24 — Preparation of soil & sowing · hard · theory
Turning the soil during ploughing is useful for the crop because it:
A. Brings the nutrient-rich soil to the top where the roots grow ✓ Correct
B. Pushes the nutrient-rich soil deep below, away from the roots
C. Packs the soil so tightly that no roots can grow in it
D. Washes away all the nutrients from the field
Solution: Only the top few centimetres of soil supports growth, so turning brings the nutrient-rich soil to the top for the roots.
Q25 — Preparation of soil & sowing · hard · theory
Loose soil encourages earthworms and microbes, which in turn benefit the field by:
A. Loosening the soil further and adding humus to it ✓ Correct
B. Making the soil hard and compact
C. Removing the humus and nutrients from the soil
D. Blocking air from reaching the plant roots
Solution: Earthworms and microbes favoured by loose soil further loosen the soil and add humus to it.
Q26 — Preparation of soil & sowing · hard · theory
A farmer wants to sow seeds across a large field at equal depth and distance, and also protect them from being eaten by birds. Which tool should he use?
A. Seed drill ✓ Correct
B. Traditional funnel
C. Leveller
D. Khurpi
Solution: The seed drill sows seeds uniformly at equal depth and distance and covers them with soil, which protects them from birds.
Q27 — Preparation of soil & sowing · hard · theory
During field preparation and sowing, in which order are these tools correctly used?
A. Plough first, then leveller, then seed drill ✓ Correct
B. Seed drill first, then plough, then leveller
C. Leveller first, then seed drill, then plough
D. Sickle first, then leveller, then plough
Solution: The soil is first loosened and turned with a plough, then the field is levelled with a leveller, and finally the seeds are sown with a seed drill.
Q28 — Irrigation · hard · theory
A farmer has a fruit orchard in an area where water is very scarce and wants to waste no water at all. Which irrigation method should he choose?
A. Drip system ✓ Correct
B. Sprinkler system
C. Moat (pulley system)
D. Chain pump
Solution: The drip system delivers water drop by drop directly to the roots with no wastage, making it a boon for fruit plants where water is scarce; the sprinkler, though modern, sprays water over the whole area and the moat and chain pump are less efficient traditional methods.
Q29 — Irrigation · hard · theory
Apart from keeping the plant alive, the water supplied by irrigation helps the crop mainly by
A. dissolving nutrients so they can be transported to all parts of the plant ✓ Correct
B. adding humus to the soil around the roots
C. fixing atmospheric nitrogen inside the root nodules
D. uprooting the weeds growing near the crop
Solution: Water dissolves nutrients and carries them to every part of the plant; humus comes from manure, nitrogen is fixed by Rhizobium bacteria and weeds are removed by weeding, not by irrigation.
Q30 — Irrigation · hard · theory
One farmer waters his field with a rahat (lever system) and another with a sprinkler. Which statement about them is correct?
A. The sprinkler uses water more economically than the rahat ✓ Correct
B. The rahat is a modern method that saves the most water
C. The sprinkler is a traditional method worked by bulls
D. Both methods waste exactly equal amounts of water
Solution: The rahat is a traditional, less efficient method, while the sprinkler is a modern method that uses water economically.