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Home /Doubts and Solutions/CBSE/Class 9/Biology/Improvement In Food Resources

Improvement In Food Resources Free Doubts and Solutions

CBSE - IX - Biology - Improvement in Food Resources

make a project file on "improvement on food resources"(10 pages paste picture also)

Asked by Disha 27th June 2018, 1:28 PM
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CBSE - IX - Biology - Improvement in Food Resources

What is feed ? What are the different types of weed ? How does it differ with respect to age and functions ?

Asked by jeffladebo 12th May 2015, 5:03 PM
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CBSE - IX - Biology - Improvement in Food Resources

Explain the various preventive measures against insect pests .

Asked by jeffladebo 12th May 2015, 4:59 PM
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CBSE - IX - Biology - Improvement in Food Resources

Discuss the various methods which are used to control plant diseases .

Asked by jeffladebo 12th May 2015, 4:59 PM
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CBSE - IX - Biology - Improvement in Food Resources

Explain the various methods of crop improvement . Name one improved variety of Rice , Maize , Soyabean , Sunflower and Mustard.

Asked by jeffladebo 12th May 2015, 4:57 PM
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CBSE - IX - Biology - Improvement in Food Resources

Compare between mixed cropping and intercropping . Write down from advantage of both of these techniques .

Asked by jeffladebo 12th May 2015, 4:54 PM
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CBSE - IX - Biology - Improvement in Food Resources

Explain various types of irrigation systems in India . How can efficiency of applied water be increased in agriculture .

Asked by jeffladebo 12th May 2015, 4:49 PM
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CBSE - IX - Biology - Improvement in Food Resources

Define irrigation . Why is irrigation of crops essential ? Mention the harmful effects of excessive irrigation .

Asked by jeffladebo 12th May 2015, 4:46 PM
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CBSE - IX - Biology - Improvement in Food Resources

Explain what will happen if in a cultivated field only manures are supplied and in another field only fertilizers are supplied, keeping all other conditions similar .

Asked by jeffladebo 12th May 2015, 4:43 PM
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CBSE - IX - Biology - Improvement in Food Resources

Explain the mechanism of compost formation.

Asked by jeffladebo 12th May 2015, 4:39 PM
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