Agronomy MCQ Question and Answer | Agriculture MCQ Question

Earth's perihelion means it is at the closest point to the sun in the path of its orbit. Perihelion and Aphelion describe the closest and farthest distance of the earth to the sun. Perihelion is about two weeks after the December solstice while aphelion is about two weeks after the June solstice.

Khaira disease is associated with paddy. It is micro nutritional deficiency disease characterized by the presence of dusty brown patches on leaves which ultimately undergo necrosis. It affects the leaf of the plant because of which the rate of photosynthesis is decreased ultimately affecting the production. The essential nutrient responsible for khaira disease in rice is Zinc.

The semi-dwarfing gene sd-1 is identified in the Chinese variety DGWG (Dee-Geo-Woo-Gen) and is one of the most important genes deployed in modern rice breeding. IR-8 is a high-yielding semi-dwarf rice variety developed by the IRRI (International Rice Research Institute) in 1960.

The leaf area meter determines the plant canopy of field crops.
A psychrometer can be used to find relative humidity, it is computed by multiplying the amount of moisture in the air at a given temperature, dividing by the maximum amount of moisture the air could contain at that same temperature and then multiplying the quotient by 100.
The pressure plate is the instrument to measure soil water retention.
Irrometer is a meter that senses and provides a direct measurement of soil water tension.

Aruna is the mutant variety of castor, which is officially approved in 1969. It was developed by treatment of seeds with thermal neutrons to induce very early maturity i.e. 120 days instead of 270 days.

Sprouting is the natural process or the first step in the seed germination process. When mungbeans are allowed to sprout, vitamin C is synthesized. Mungbeans are considered to be very healthy because it is low in calories, fibre rich, and have ample vitamins like B, C and K along with various elements.

USLE stands for Universal Soil Loss Equation, which is a powerful tool that is widely used by soil conservationists. It was developed by W. H. Wischmeier. It predicts the annual soil loss per unit area. A = R × K × L × S × C × P
Where R = rainfall factor
K = soil erodibility factor
L = slope length factor
S = slope gradient factor
C = cropping management factor
P = Erosion control management factor

Irrigation is one of the most important factors which affect the production of the crop. In irrigation also some parameters to be followed for maximum yield. The most critical stages for irrigation of sugarcane are the formative or vegetative period i.e. tillering or stem elongation stage.

The scientific name of noble cane is Saccharum officinarum. It represents the highest development of the cane species with thick barrel shaped interned, large soft rinded juicy stalks and the most important high sugar content.

For treating seeds to make them free from insects and pests along with high yielding, the treatment should be followed in a sequence i.e. first it should be treated with a good fungicide, then insecticide followed by rhizobium treatment for nitrogen fixation.