Food Resources Improvement Class 9th CBSE Test

Crop rotation is the practice of growing different types of crops in the same area in sequential seasons. It helps in maintaining soil fertility, controlling pests and diseases, and reducing soil erosion.

Artificial selection is the process of selecting and breeding plants or animals with desired traits to enhance their productivity or quality. It is significant in developing crop varieties and livestock breeds with improved characteristics for better food production.

Sustainable agricultural practices involve using environmentally friendly methods to cultivate crops and raise livestock, while ensuring the long-term viability of farming. These practices contribute to food security by preserving natural resources, reducing environmental degradation, and promoting stable food production.

Advantages: high yield, efficient use of machinery. Disadvantages: loss of biodiversity, increased vulnerability to pest outbreaks and diseases.

The Green Revolution led to the development of high-yielding varieties of crops, increased use of fertilizers and pesticides, and modern agricultural techniques, resulting in improved food production and reduced food scarcity.

Biotechnology has enabled the development of genetically modified crops with enhanced traits, leading to increased crop yield, resistance to pests, and tolerance to environmental stresses. However, it has also raised concerns about biodiversity loss, health risks, and ethical considerations.