Improvement in Food Resources | Chapter Assessment | English | Grade 9

Fertilisers are composed of _______.

• decayed matter

• plant waste

• animal waste

• chemicals

Answer explanation

Fertilisers are mainly composed of chemicals like Nitrogen, Phosphorus and Potassium.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Significance of crop rotation is ______.

• If one crop catches disease another crop survives

• Presence of different crops takes different nutrients from the soil, this maintains balance of nutrients in the soil.

• both 1 and 2

• neither 1 nor 2

Answer explanation

Significance of crop rotation are - 1. If one crop catches disease another crop survives 2. Presence of different crops takes different nutrients from the soil, this maintains balance of nutrients in the soil.

Tags

NGSS.MS-LS1-5

Choose the incorrect option with respect to improvement factor in crop production.

• High yield

• Biotic and abiotic resistance

• Long maturity duration

• None of these

Answer explanation

Long maturity duration is not the improvement factor in crop production Improvement factors in crop production are - High yield Short maturity duration Biotic and abiotic resistance

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Loss of foodgrain may occur due to (a) Grains are properly dried (b) Spraying of chemical to protect grains from fungus and insects (c) Grains are kept in moisture (d)Storage place have rats

• a , b

• c, d

• b, c

• b, d

Answer explanation

If grains are kept in moisture they will catch fungus and hence there will be loss of food grain. If storage granary have rats then they will eat the food grains, which is also a loss. So, option 2 is the correct answer.

Tags

NGSS.MS-LS2-1

How will you control weeds in the field?

• Removing it manually

• Deep ploughing

• Using weedicides

• All of these

Answer explanation

Weeds in the field can be controlled by - Removing it manually Deep ploughing By using weedicides

What are the steps involved in crop production management?

• Nutrient management

• Cropping pattern

• Irrigation

• All of these

Answer explanation

Nutrient management allows proper supply of essential nutrient in the soil using manure or fertilisers. Cropping pattern allows plantation of two or more crops on the same field, due to which different nutrient are taken from the soil. Irrigation allows the adequate supply of water to the crops for proper growth.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ETS1-1

Productivity of crop may decrease due to which of the following reasons ? (a) Presence of insects on crops (b) Disease in crops (c) Presence of weeds in the farm

• (a), (b) and (c)

• (a) and (b)

• (b) and (c)

• None of the above

Answer explanation

Crop production may decrease due to - (a) Presence of insects on crops (b) Disease in crops (c) Presence of weeds in the farm

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Chickens raised for the production of meat are called

• layers

• broilers

• both 1 and 2

• neither 1 nor 2

Answer explanation

Egg laying hens are called layers. Hens that used for meat are called broilers.

Which of the following statement is correct. (i) Floors of cattle shade must be sloping (ii) Cattle shade should be without roof (iii) Food must have roughage (iv) Cattles must be brushed regularly

• (i)(ii)(iii)(iv)

• (i)(ii)(iii)

• (i)(iii)(iv)

• (ii)(iii)(iv)

Answer explanation

Cattle food and care of cattle must include (i) Floors of cattle shade must be sloping (iii) Food must have roughage (iv) Cattles must be brushed regularly

Beekeeping is done to obtain ____ from bees.

• Wax

• Honey

• both 1 and 2

• neither 1 nor 2

Answer explanation

From bees we obtain honey as well as wax.