Agronomy MCQ Question and Answer | Agriculture MCQ Question

Rapeseed and mustard are leguminous plants, that belong to the Brassicaceae family. The seed pods of rapeseed and mustard are called as Siliquae. It is eventually green in colour but after ripening turn to brown colour.

Leucaena leucoephala is a small fast growing tree, also called River tamarind, Jumbay, White popinac is widely used for a variety of purposes like Fencing, firewood, fiber, livestock fodder as well as manure to increase soil fertility. That is why it is also called a Miracle plant.

Organic herbicides are the substances prepared from living wastes like plants essential oils etc. and it does not affect our environment they just act on the applied plant. Organic herbicides use active ingredients like Acetic acid, Citric acid, Clove oil, lemongrass oil, Citrus oil, etc. which contain carbon and hydrogen in their molecules.

Polysaccharides are the agent which binds the organic matter present in soil aggregate and improves the texture and binding ability of the soil. Soil is the mixture of sand, silt, gravel and crushed stone along with some organic matter which provides nutrition to the plants growing in that soil.

Potassium is the element that does not enter into permanent organic combination in plants because it is absorbed by the plants in a compound form not directly and it can be easily leached from nonliving plant tissue also.

Nitrogen, phosphorous, and potassium are the essential nutrients provided to the soil for maximum yield, its mixture is also known as NPK fertilizer, it is a combination of all three in specific portions. In a wheat field, when the yield is 50 quintal/hectare, it uses NPK in ratios 100-150, 70-80 and 125-150 respectively.

A cropping pattern is a pattern followed to grow various crops in the same field at different proportions and at different points of time. This practice helps in maintaining the fertility of the soil with optimum utilization of resources, time-saving, and controlling the spread of disease and pests also.

The critical stages of maize plantation are the Early vegetative, tasselling and silking stage but the most critical is the silking stage when the plant needs almost care about irrigation and nutrients. Corn is extremely sensitive to any stress which limits photosynthetic capacity if not taken care of at critical stages.

A hybrid formed by crossing Wheat and Rye is known as Triticale. It is the combination of the words Triticum (Wheat) and Secale (Rye). It was first bred in laboratories of Scotland by A. S. Wilson in 1873. It is mostly grown for forage or fodder, but nowadays also used as breakfast cereals.

A lysimeter is a device used to measure percolation and leaching losses from a column of soil under controlled conditions.

It helps in studying water movement, nutrient loss, and soil-water balance, which are crucial for irrigation and soil management.

Lysimeters are commonly used in agricultural research to understand evapotranspiration, groundwater recharge, and pollutant transport in the soil.

Other options: Infiltrometer measures the rate of water infiltration into the soil.

Odometer is used for measuring soil compaction and consolidation.

Psychrometer is an instrument for measuring humidity.