Olympiad Test: Improvement in Food Resources- 2 - Class 9 MCQ

In the field of art, hybridization is the crossing between heterogeneous technical, semiotic and aesthetic elements.

If the same crop is grown year after year, fertility of soil is lost due to utilization of same minerals again and again. Soil fertility is usually maintained in the field by rotation of crops i.e., a crop is alternated by a leguminous crop.

Draught animals are used for agricultural tasks like tilling, irrigation and carting. The most commonly known draught animals are horses, donkeys, mules, camels, elephants etc. They are linked to the economic well-being of the human communities in which they are used.

The White Revolution in India helped in reducing malpractice by traders and merchants. It also helped in eradicating poverty and made India the largest producer of milk and milk products. The revolution also reduced regional and seasonal price variations ensuring customer satisfaction and at the same time. Also, it ensured that the producers get a major share of the price that customers pay. Dr Verghese Kurien was the chairman of the National Dairy Development Board when the white revolution was implemented. With the cooperation and consideration of the management skills of this man, the revolution achieved a grand success. Hence, he is regarded as the pioneer of the white revolution.

Red Sindhi animals are hardy and adapt very well to stressful environments. Milk yield per lactation varies from 1200 to 2000 liters. Adult males weigh 400-500 kg, while females weigh 300-350 kg. Average lactation length is 265 days; Age at first calving is 45 months Service period is 210 days . Dry period is 230 days.

The minerals required by plants in large quantity are called macronutrients whereas minerals required by plants in smaller quantity are called micronutrients.

Carbon, hydrogen, oxygen, nitrogen, phosphorous and potassium are some of the essential macronutrients required by plants. Copper, iron, molybdenum, boron, zinc are the important micronutrients required by plants. Among the minerals listed in the question, nitrogen is required by plants in largest quantity.

Sustainable agriculture is the method of growing crops by using the technique without harming the environment. Slash and burn farming is not a sustainable agriculture technique as they increase the air pollution by releasing a large amount of carbon dioxide.

Root nodules are present in roots of leguminous plants. Leguminous plants belong to family Leguminosae i.e., common pulses. Of the given options only gram is a leguminous crop. Hence, only 'Gram' is expected to show root nodules.

The most important source of food and fodder are cereal which includes rice and wheat. Grains of rice and wheat are used as food and stems and leaves of cereals are used as fodder.

Rice is one of the main crops of India and is produced in almost all states.

India is the world’s second-largest producer of rice and the largest exporter of rice in the world.

So, it is the principal cereal crop in India compared to other cereal crops. The top three producer states are West Bengal, Punjab and Uttar Pradesh.