What are the benefits and problems of green revolution?

List of the Advantages of the Green Revolution

• It may be helping to reduce the number of greenhouse gas emissions.
• It allows us to produce more food than traditional growing methods.
• It provides us with consistent yields during uncooperative seasons.
• It causes a reduction in food prices for the global economy.

What are the limitations of Green Revolution Class 9?

However there were certain limitation of the Green Revolution:

• Green revolutions resulted in loss of soil fertility due to increased use of chemical fertilisers and pesticides.
• Continuous use of groundwater for tube well irrigation reduced the water-table below the ground.

What are the two methods for crop variety improvement?

Example: Wheat grain, peas, mustard and linseed are rabi crops. Crop variety improvement: It can be done either by hybridisation or by introducing a gene. (i) Crop improvement by hybridisation: Hybridisation refers to crossing between genetically dissimilar plants.

Which is a prerequisite for crop improvement?

Answer: Crop improvement refers to the genetic alteration of plants to satisfy human needs. In the process they transformed elements of these species into crops though genetic alterations that involved conscious and unconscious selection, the differential reproduction of variants.

What are biotic and abiotic factors?

Biotic factors are living things within an ecosystem; such as plants, animals, and bacteria, while abiotic are non-living components; such as water, soil and atmosphere. The way these components interact is critical in an ecosystem.

Why is crop variety improvement important?

The factors for which variety improvement is done are: (i) Higher yield: To increase productivity of the crop per acre. (ii) Improved quality: The quality of crop products vary from crop to crop. E.g., protein quality is important in pulses, oil quality in oilseeds, preserving quality in fruits and vegetables.

What are the methods of crop improvement?

Methods used for crop improvement:

• Plant Introduction.
• Selection.
• Hybridization.
• Mutation Breeding.
• Polyploidy.

Why do we need improvement in crop yields?

It becomes necessary to increase the crop variety to produce disease-resistance offsprings of the crops. It also helps in providing better and superior varieties based on the quality and quantity of the yield.

What was the impact of green revolution?

IMPACT ON FOOD PRODUCTION The impact of the Green Revolution on wheat and rice production is a function of the area sown to the new wheat and rice varieties, and the increase in yields per unit of land. Increasing yields have made rice and wheat more profitable for farmers than certain other crops.

What are the advantages of green revolution class 9?

Merits and Demerits of Green Revolution

• Higher Yield.
• Machines made for ploughing harvesting easy.
• Surplus food can be sold to earn more.
• Pests and insects controlled by pesticides and insecticides.
• Good irrigation enhances production.

What is crop variety improvement?

Crop variety improvement is the primary step to improve food crop production. It helps in the development of crops with desired traits such as high yields, disease resistance, quality product and response to fertilizers.

What is the role of hybridisation in crop improvement?

Hybridisation refers to crossing between genetically dissimilar plants. This method of hybridisation improves crops with respect to yield disease resistance pest resistance etc.

What are positive and negative impacts of green revolution?

It improved the economic lot of farmers, and their standard of living greatly improved. It reduced the import of food grains. The revolution increased the use of fertilizers. Generally speaking a fertilizer has the chance to soak into the soil and spread to other areas if it rains.

How do biotic and abiotic factors affect crop production?

Biotic factors like insects, rodents, pests, and many more spread the disease and reduce crop production. Biotic factors like insects, parasites, diseases, etc. Abiotic factors like humidity, temperature, moisture, wind, rain, flood and many more destroy the crop raise.