Very Short Question and Answers - Nutrient Management

Macronutrients are nutrients required by plants in large quantities for their growth and development. They are called macronutrients because of their significant role in various physiological processes.

Plants obtain nutrients from air, water, and soil. Air supplies carbon and oxygen, water provides hydrogen, and soil supplies other essential nutrients.

Manure is an organic matter that is prepared by the decomposition of animal excreta and plant waste, and it enriches the soil with nutrients and organic matter.

Manure improves soil structure by increasing water holding capacity in sandy soils and improving drainage in clayey soils.

Composting is the process of decomposing farm waste material such as livestock excreta and vegetable waste in pits to create compost, which is rich in organic matter and nutrients.

Vermi-compost is compost prepared by using earthworms to hasten the decomposition of plant and animal refuse.

Green manure refers to certain plants like sun hemp or guar that are grown prior to sowing crops and then ploughed into the soil to enrich it with nitrogen and phosphorus.

Fertilizers are commercially produced plant nutrients that supply nitrogen, phosphorus, and potassium to ensure good vegetative growth in plants.

Fertilizers should be applied in proper doses and at the right time, and precautions should be observed to prevent water pollution and ensure complete utilization by plants.

Continuous use of fertilizers can lead to the destruction of soil fertility, depletion of organic matter, and harm to soil microorganisms.

Organic farming is a system that minimizes or eliminates the use of chemical fertilizers and pesticides, focusing on the use of organic manures and bio-agents.

Bio-pesticides are natural substances used to control pests, such as neem leaves or turmeric, which are used in grain storage.

Macro-nutrients play a critical role in various physiological processes, including growth, reproduction, and overall health of plants.

Examples of macro-nutrients include nitrogen, phosphorus, potassium, calcium, magnesium, and sulphur.

Micronutrients are nutrients required by plants in smaller quantities, such as iron, manganese, boron, zinc, copper, molybdenum, and chlorine.

Manure helps protect the environment by reducing the excessive use of chemical fertilizers and recycling farm waste.

Using organic matter in soils enhances soil fertility, improves water retention, and supports beneficial microbial activity.

These are cropping systems in organic farming that involve growing different crops together, alternating crops in a field, and rotating crops to improve soil health and control pests.

Excessive irrigation can wash away fertilizers before they are fully absorbed by plants, leading to nutrient loss and potential water pollution.

Balancing the use of fertilizers and manure is important to achieve optimum yields while maintaining soil fertility and health in the long term.