Agronomy MCQ Question and Answer | Agriculture MCQ Question

The botanical name of India cotton is Gossypium arboreum. India is the only country in the world where all four cultivated species are grown as it supports the livelihood of 95 million people in India.

The central origin is probably Peninsular India, where the closest wild relatives (Cajanus cajanifolia) occur in tropical deciduous woodlands. From India, it travelled to East Africa and West Africa. Now pigeon pea is grown in over 50 tropical countries of the world, especially in more arid regions of Africa, Asia and the Americas.

Selective herbicide means it can be applied to the field and it will control or suppresses the targeted weed species without affecting the growth of the main crop. Atrazine serves as a selective herbicide that inhibits the process of photosynthesis in susceptible plants.

The texture of any soil is the permanent soil property while others may vary. All soil contains mineral particles, organic matter, water, and air. Soil properties can be determined by texture, structure, porosity, chemistry and colour.

Black soil is also known as Black cotton soil as cotton is grown extensively in black soils. Black soil is black in color because of the presence of the mineral Montmorinolite in the predominant amount. It is also rich in magnesium, lime, iron and organic matter.

Soil structure and its texture describe the arrangement of solid parts of the soil and the empty pore spaces between them. It also determines the arrangement of soil pores depending upon the clumping and binding of soil particles together which ultimately has a major influence on biological activity, root growth, seedling emergence and movement of water and air.

Sugarbeet also acts as a resource for organic sugar production. Sugar beet is a white, taproot structure that synthesizes sugar by the process of photosynthesis and stores it in its root, and on the further extraction process, it has a content of 10 - 12% sugar approximately. The sugar produced from sugar beet is termed beet sugar and has a sweeter aftertaste with a fruity aroma.

The rotation intensity of any cropping pattern means a growing combination of crops that matches climatic conditions, water availability, and nutrient storage of soil in that particular field. This is calculated by counting the number of crops grown in a rotation and is multiplied by 100 and then divided by the duration of the rotation. Therefore here the intensity is 400%.

Pigeon pea or red gram commonly called arhar is an important legume crop. Self-pollination is the rule in Red gram and natural crossing extends up to 65%, thus it is also known as often cross pollinated crop.
Often cross-pollinated species are those crop plants in which cross-pollination exceeds 5% and may reach 30%. Such species are generally known as often cross pollinated species means pollination occurs when pollen is delivered to a flower from a different plant.