Every question from this NCERT chapter, with a detailed explanation.
Which one of the following is an organic soil amendment derived from the decomposition of plant or animal waste?
With reference to the cropping patterns in India, consider the following statements: 1. Kharif crops are generally sown in the rainy season which spans from June to September. 2. Wheat, gram, and mustard are examples of Kharif crops. 3. Rabi crops are grown during the winter season from October to March. Which of the statements given above is/are correct?
Consider the following statements regarding the preparation of soil: 1. Loosening the soil makes it compact and prevents root penetration. 2. Turning the soil brings nutrient-rich soil to the top for plant utilization. 3. Loosened soil promotes the growth of earthworms and soil microbes. Which of the statements given above is/are correct?
With reference to agricultural implements, consider the following statements: 1. A ploughshare is the strong triangular iron strip found in a plough. 2. A hoe is a tool used exclusively for sowing seeds. 3. A cultivator is a manual tool used for harvesting crops. Which of the statements given above is/are correct?
Consider the following statements regarding the sowing of seeds: 1. Damaged seeds are generally lighter than healthy seeds and float on water. 2. The traditional tool for sowing seeds is shaped like a flat blade. 3. A seed drill ensures that seeds are covered by soil after sowing to protect them from birds. Which of the statements given above are correct?
With reference to the use of manure and fertilisers, consider the following statements: 1. Continuous cultivation of crops enriches the soil with nutrients. 2. Manure is an organic substance obtained from the decomposition of plant or animal wastes. 3. Fertilisers are rich in plant nutrients like nitrogen, phosphorus, and potassium. Which of the statements given above is/are correct?
Consider the following statements regarding the advantages of organic manure: 1. It enhances the water-holding capacity of the soil. 2. It makes the soil compact, preventing the exchange of gases. 3. It decreases the number of friendly microbes in the soil to prevent disease. Which of the statements given above is/are correct?
With reference to irrigation systems, consider the following statements: 1. The sprinkler system is more useful on uneven land where sufficient water is not available. 2. In the drip system, water is sprayed over the crops like rain. 3. The drip system minimizes water wastage. Which of the statements given above is/are correct?
Consider the following statements about weeds and their control: 1. Weeds are cultivated plants grown specifically for fodder. 2. Tilling before sowing helps in the uprooting and killing of weeds. 3. Weedicides are typically sprayed during the vegetative growth of weeds before flowering. Which of the statements given above is/are correct?
With reference to harvesting, consider the following statements: 1. Threshing is the process of sowing seeds into the soil. 2. Winnowing is a method used by farmers with small landholdings to separate grain from chaff. 3. A 'Combine' is a machine used exclusively for irrigation. Which of the statements given above are correct?
Consider the following statements regarding the storage of grains: 1. Freshly harvested grains must be dried before storage to prevent spoilage. 2. Large scale storage of grains is done in open fields without protection. 3. Dried neem leaves are used for storing food grains at home. Which of the statements given above is/are correct?
With reference to crop rotation, consider the following statements: 1. It involves growing the same crop continuously in the same field. 2. It helps in replenishing the soil with nitrogen. 3. Legumes are grown as fodder in one season to support this process. Which of the statements given above are correct?
Consider the following statements about Rhizobium bacteria: 1. They are found in the nodules of roots of leguminous plants. 2. They help in fixing atmospheric oxygen into the soil. 3. They deplete the soil of its nitrogen content. Which of the statements given above is/are correct?
With reference to traditional methods of irrigation, consider the following statements: 1. They typically use cattle or human labour. 2. They are generally more efficient than modern methods. 3. Moat and Rahat are examples of traditional irrigation systems. Which of the statements given above is/are correct?
Consider the following statements regarding fertilisers: 1. They are natural organic substances obtained from plant decomposition. 2. They are very rich in plant nutrients like nitrogen, phosphorus, and potassium. 3. Excessive use of fertilisers can make the soil less fertile. Which of the statements given above are correct?
With reference to the process of tilling, consider the following statements: 1. It involves the loosening and turning of the soil. 2. It is done using a leveller. 3. It promotes the rapid growth of weeds. Which of the statements given above is/are correct?
Consider the following statements about the 'Seed Drill': 1. It sows seeds at equal distance and depth. 2. It requires manual placement of seeds into the soil. 3. It saves time and labour compared to traditional methods. Which of the statements given above is/are correct?
With reference to the water requirements of crops, consider the following statements: 1. Paddy requires very little water and is grown in the winter season. 2. The frequency of irrigation is generally higher in summer due to increased evaporation. 3. Germination of seeds does not take place under dry conditions. Which of the statements given above is/are correct?
Consider the following statements regarding the nutrient replenishment of soil: 1. Leaving the field fallow allows the soil to replenish nutrients naturally. 2. Manuring is the process of adding chemical substances produced in factories to the soil. 3. Crop rotation depletes the soil of nitrogen. Which of the statements given above is/are correct?
With reference to weedicides, consider the following statements: 1. They are chemicals used to control weeds. 2. They are sprayed to kill the main crop along with the weeds. 3. They are best sprayed during the vegetative growth of weeds before flowering. Which of the statements given above is/are correct?
Consider the following statements about the 'Hoe': 1. It consists of a short plastic handle without any rod. 2. It has a strong, broad, bent plate of iron that works like a blade. 3. It is primarily used for removing weeds and loosening the soil. Which of the statements given above is/are correct?
With reference to animal husbandry, consider the following statements: 1. It involves rearing animals on a large scale with proper food, shelter, and care. 2. Fish is a source of cod liver oil which is rich in Vitamin C. 3. Animals, like plants, do not require specific nutrients for growth. Which of the statements given above is/are correct?
With reference to the 'Drip System', consider the following statements: 1. It allows water to flow through the main pipe under high pressure to rotate nozzles. 2. It provides water drop by drop near the roots. 3. It is the best technique for watering fruit plants and trees. Which of the statements given above is/are correct?
Consider the following statements regarding 'Crumbs' in a field: 1. They are big clumps of soil found in a ploughed field. 2. It is beneficial to leave these crumbs unbroken to retain soil moisture. 3. They are broken using a seed drill. Which of the statements given above is/are correct?
With reference to the transplantation of seedlings, consider the following statements: 1. Seeds of paddy are first grown in a nursery. 2. When seedlings grow, they are transplanted to the field exclusively by automated machines. 3. This method is commonly used for crops like paddy and chillies. Which of the statements given above is/are correct?
Consider the following statements regarding the nutrient content of Manure vs Fertiliser: 1. Manure is richer in plant nutrients like nitrogen and phosphorus compared to fertilisers. 2. Fertilisers are very rich in nitrogen, phosphorus, and potassium. 3. Manure provides humus which fertilisers do not. Which of the statements given above is/are correct?
Consider the following statements about the water retention in soil: 1. Sandy soil has higher water retaining capacity than soil treated with manure. 2. Use of manure improves the water retaining capacity of the soil. 3. Humus makes the soil compact and reduces its porosity. Which of the statements given above is/are correct?
Consider the following statements regarding 'Silos': 1. They are used for the large-scale storage of grains. 2. They are open storage structures that expose grains to pests like rats. 3. They are tall metallic or concrete structures used for bulk storage. Which of the statements given above is/are correct?
Consider the following statements about the decomposition in soil: 1. Dead plants and animals in the soil are decomposed exclusively by chemical weathering, not by organisms. 2. Decomposition releases nutrients back into the soil. 3. These nutrients are then absorbed by plants. Which of the statements given above is/are correct?
With reference to 'Winnowing', consider the following statements: 1. It is a process of separating grain from chaff. 2. It is typically used by farmers with large landholdings and combine machines. 3. It relies on water currents to separate lighter chaff from heavier grains. Which of the statements given above is/are correct?
Consider the following statements about the environmental impact of agriculture: 1. Excessive use of fertilisers can lead to water pollution. 2. Burning of stubs left in the field is an eco-friendly practice that enriches the air with oxygen. 3. Weedicides are toxic and can affect the health of farmers if not handled carefully. Which of the statements given above is/are correct?
Consider the following statements regarding the 'Moat' system: 1. It uses an electric pump and sprinkler nozzles for irrigation. 2. It is a traditional method of irrigation used in earlier times. 3. It lifts water for irrigation. Which of the statements given above is/are correct?
With reference to the depth of sowing, consider the following statements: 1. Seeds must be sown at appropriate depths to ensure good yield. 2. Seeds sown on the surface are naturally protected from birds by sunlight. 3. Seeds sown very deep germinate faster due to higher soil pressure. Which of the statements given above is/are correct?
With reference to 'Harvest Festivals', consider the following statements: 1. They mark the period of harvest and are celebrated with joy. 2. Pongal and Bihu are festivals exclusively celebrated in Western India. 3. These festivals are celebrated in various parts of the country. Which of the statements given above is/are correct?
Consider the following statements regarding the 'Sickle': 1. It is a tool used for ploughing the soil. 2. It is used for manual harvesting of crops. 3. It has a sharp curved metal blade attached to a handle. Which of the statements given above is/are correct?
With reference to 'Granaries', consider the following statements: 1. They are used for storing harvested grains. 2. They are designed to expose grains to moisture and pests to accelerate ripening. 3. They are used for the production of manure. Which of the statements given above is/are correct?
Which one of the following crops is cultivated during the Rabi season in India?
In agriculture, the process of loosening and turning the soil is referred to as:
Which one of the following organisms is ecologically beneficial to agriculture by loosening soil and enhancing humus content?
What is the primary agronomic reason that paddy is not typically cultivated during the winter season in India?
In which one of the following types of plants are nitrogen-fixing Rhizobium bacteria typically found in root nodules?
In the context of agriculture, the chemical '2,4-D' is primarily employed as a:
Which one of the following soil nutrients is naturally replenished by the cultivation of leguminous crops?
Cod liver oil is primarily consumed as a source of which one of the following vitamins?
What is the primary objective of drying harvested grains before storage?
Which one of the following is classified as a synthetic chemical fertiliser?
The agricultural practice of growing different crops alternately on the same land to replenish soil nutrients is known as:
Which one of the following agricultural implements is traditionally used for the manual removal of weeds?
In India, the Kharif cropping season primarily corresponds to which one of the following periods?
Which one of the following plant leaves is traditionally used in Indian households to protect stored grains from insect infestation?
The method of separating viable seeds from damaged ones by immersion in water is based on the difference in: