Rice crop requires an average temperature of 24°C with a range of
- 10°C to 15°C
- 16°C to 32°C
- 21°C to 27°C
- 24°C to 35°C
Answer
16°C to 32°C
Gram can be best grown is
- red soil
- Loamy soil
- black soil
- laterite soil
Answer
Loamy soil
Wheat is the staple food of
- North
- South
- East
- West
Answer
North
In this method of cultivation the seeds are dropped at regular interval in the furrows made by the farmers with the help of a plough or dibber — It is
- Drilling method
- Broadcasting method
- Dibbling
- Transplantation
Answer
Dibbling
Diseases damage the rice crop and can reduce yield. The most common diseases are
- Rust
- Loose smut
- Black point
- Stem rot
Answer
Stem rot
Rice crop requires an average rainfall of
- 100 cm to 150 cm
- 150 cm to 200 cm
- 50 cm to 100 cm
- 50 cm to 150 cm
Answer
150 cm to 200 cm
The largest producer of Jowar
- Punjab
- Maharashtra
- West Bengal
- Uttar Pradesh
Answer
Maharashtra
Millets require temperature ranging from
- 25°C to 35°C
- 10°C to 15°C
- 26°C to 33°C
- 20°C to 27°C
Answer
26°C to 33°C
Wheat grows well is
- Red soil
- Alluvial soil
- Black soil
- Laterite soil
Answer
Alluvial soil
The crop is hardy and drought resistance
- Pulses
- Wheat
- Millets
- Rice
Answer
Millets
What do you understand by the term 'cereals'?
Answer
Cereals are plants that are grown for their edible grain, which is used as a food for humans and animals. Some examples of cereal grains include wheat, rice, maize, barley, etc. Cereals form the staple food for a large proportion of the population worldwide.
Name the different methods of sowing rice.
Answer
Following are the methods of sowing rice:
- Broadcasting or scattering.
- Dibbling.
- Drilling.
- Transplantation.
- Japanese method of cultivation.
Which is the best method of growing rice?
Answer
Japanese method of cultivation is the best method of growing rice as it ensures three times higher yield and less wastage of seeds.
What kind of soil is best suited for growing rice?
Answer
Deep fertile clayey or friable loam and black lava soil are best suited for growing rice because of their high water holding capacity.
Name the leading producer of rice in India.
Answer
West Bengal is the leading producer of rice in India.
Name a state in India where rice is grown as a non-food crop.
Answer
Punjab is one state in India where rice is grown as a non-food crop.
Name an area in India where rice is grown under 'Shifting Cultivation'.
Answer
Rice is grown under 'Shifting Cultivation' in North-East India.
State the reasons for low yield of rice in India.
Answer
Reasons for low yield of rice in India are:
- Poor farmers can not afford high-yielding variety of rice.
- Pests and diseases decrease the yield of rice. Proper pests and disease management is not done by farmers.
- Most of the parts of India depend on monsoon rains which are highly unreliable and erratic leading to loss of crop due to drought or flood.
- Advanced cultivation methods are not being used by most of the farmers.
What are the climatic conditions suitable for growing of wheat?
Answer
Climatic conditions suitable for growing of wheat are:
- Wheat is a temperate crop which requires cool climate with moderate rainfall.
- It needs an average temperature between 10°C to 15°C at the time of sowing and higher temperature between 20°C to 25°C is required at the time of ripening.
- Wheat needs 50 to 100 cm rainfall.
Is wheat a rabi or kharif crop?
Answer
Wheat is a rabi crop.
Name the leading producer of wheat in India.
Answer
Uttar Pradesh is the leading producer of wheat in India.
Give two natural and two man-made factors that help in the cultivation of wheat.
Answer
Two natural factors that help in the cultivation of wheat are:
- Wheat is a temperate crop. In India, it is taken as Rabi crop. Winter temperature of North India provides most favourable conditions for wheat cultivation.
- The fertile friable loamy alluvial soils of clayey composition of the flat and well-drained Indo-Gangetic plains is best suited for wheat cultivation.
Two man-made factors that help in the cultivation of wheat are:
- Supply of high yielding variety (HYV) seeds with proper use of chemical fertilizers.
- Excellent irrigation system provided by a close network of canals.
Give a few important aspects of 'Green Revolution'.
Answer
A few important aspects of ‘Green Revolution’ were:
- Introduction of new varieties in India.
- Production of high-yielding varieties of wheat and rice in India.
- Use of artificial fertilizers and irrigation facilities lead to increase in yield.
- Use of pesticides and herbicides lead to increased yield by stopping wastage of crop and soil nutrition.
In which season is wheat sown and why?
Answer
Wheat is sown in rabi season because it is a temperate crop which needs not more than 10°C to 15°C temperature at the time of sowing.
Is maize a rabi or kharif crop? Name three leading producers of maize.
Answer
Maize is primarily a kharif crop but in some states like Tamil Nadu, it is grown as rabi crop. Three leading producers of maize are Karnataka, Maharashtra and Andhra Pradesh.
Why are the millets called the dry crops?
Answer
Millets are hardy, drought and heat resistant plants and therefore mostly cultivated in the drier parts of the monsoon lands. Hence, they are called the dry crops.
Why are millets so widely grown?
Answer
Millets are widely grown because they are hardy, drought and heat resistant plants that can be easily grown in areas of less rainfall. They can be grown in plains and on uplands up to 1200 meter in height. Millets do not have any special requirement as far as soil is concerned.
Give two new uses of maize.
Answer
Two new uses of maize are:
- It is used in confectionery as corn-flour and cereal as corn-flakes.
- It is used in production of bio-fuel.
What is the common feature of all millets?
Answer
All millets are kharif crops grown in warm weather. They are hardy, drought and heat resistant and can be grown in areas with less rainfall. They can grow in any kind of soil.
Name the most important rotation crop. In what way does it help the soil?
Answer
Pulses are the most important rotation crop because they are leguminous plants with root-nodules, which can fix and utilize atmospheric nitrogen in the soil. It makes the soil rich in nitrogen and provides enough nitrogen to the next crop sown.