CBSE Class 9 Biology Crop Improvement
Q.
What is the first stage in farming practice?
Q.
The process of developing seed varieties which gives increased crop yield is called
Q.
Crossing between two genetically dissimilar plants is called
Q.
Production of genetically modified crops through artificial insertion of a gene is called
Q.
Which of the following is not a macro-nutrient?
Next Videos
- mention the preventive and control measure used before grain are stored?
- "Ration of crop also help in pest control." What is meant by ration of crop?
- What are the objectives of crop variety improvement
- raw mango pieces are sprinkled with salt before pickling
- Enlist some factors for which variety improvement is done in plants.
- Compare fertilizers and manures.
- What is 'green manuring'? List any two commonly used green manure crops and name two macronutrients provided by green manure.
- How are cultivation practices and crop yield related to weather? Describe any three factors for which variety improvement is done.
- What is meant by the term 'green manure'? State its role in agriculture.
- What is manure? How is it prepared? State its role in changing the quality of soil of a field having excess of: (i) Sand (ii) Clay
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