Agronomy MCQ Question and Answer | Agriculture MCQ Question

N-content in ammonium sulphate is about 20.60%. This is an inorganic salt most commonly used as soil fertilizer and it contains 20.60% of nitrogen and 24% Sulphur. In the soil the ammonium ion is released and forms a small amount of acid, lowering the pH balance of the soil, while contributing essential nitrogen for plant growth.

SSP (Single superphosphate) and MAP (Mono ammonium phosphate) are fertilizers that contain water soluble phosphorus.
SSP is the first commercial mineral fertilizer, and it led to the development of the modern plant nutrient industry but because of its low P content, it is being replaced now.
MAP is a widely used source of phosphorus (P) and nitrogen (N). it contains about 10% nitrogen.

The concept of the critical stage of irrigation illustrates the ultimate stage if irrigation is not done to the field then it will cause a reduction in yield at the maximum level or the stage at which the water stress causes severe yield reduction.
The critical stage of water is also termed a moisture-sensitive period.

Linseed also known as Flax seed belongs to the Flax family i.e. Linaceae.
It is a flowering plant, scientific name is Linum usitatissimum.
it is cultivated as a food and fiber crop in temperate regions.
Linen is the most common fabric used in the textile industry and is made from Flax seeds.

Maize grown in the Rabi season is tolerant to cold and resistant diseases. Crops mature within 180 days. The average yield of this type of maize is 25 qtl/acre. This type of cultivation is suitable for baby corns.
The states which are the largest producer of Rabi maize are Andhra Pradesh (45.5%), Bihar (20.1%), Tamilnadu (9.3%), Karnataka (8.5%), West Bengal (5.3%).

Acre is the unit of land measurement in the British Imperial and United States.
1 acre = 4046.86 square meter
           = 43560 square foot
           = 4840 square yards
           = 0.404 hectare

Clay soil requires more herbicide dose than sandy soil. Clay particles are negatively charged and have a large surface area. Therefore the soils which have a high content of clay can absorb or tie up with the molecules of herbicides. While the percolation rate of sandy soil is more it absorbs the moisture and chemicals in the least amounts.

The grouping of clouds is done based on altitude levels or levels in the troposphere. The clouds that are found at high altitudes are termed cirrus, at middle altitude as alto and low altitude as Strato or Stratus. While very low stratiform clouds that touch Earth's surface are called Fog and mist.

Layering is the most common method of vegetative propagation in plants. It enables the Horticulturists to propagate the desirable plants with multiple varieties.
The layering is done with various flowering plants like rose, hibiscus and bougainvillea but in fruiting plants, it is mainly done in Lemon.

The biocontrol agents are agents which originate naturally and protect plants from their natural enemies like parasites, predation, etc. these agents are harmful to specific organisms and do not harm the useful plants and organisms present in the soil.
For the Lantana plant, Uropalta giraldi, Ophiomya lantanae and Crocidocema lantanae all act as bio-control agent.