Agronomy - Study Mode
[#196] Black cotton soil is rich in
Correct Answer
(A) Montmorillonite
Explanation
Solution: 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.
[#197] Soil structure concerns with
Correct Answer
(B) Arrangement of soil particles
Explanation
Solution: 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.
[#198] Sugar recovery from sugar beet is approximately
Correct Answer
(B) 10 - 12%
Explanation
Solution: 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.
[#199] The rotational intensity of maize-potato-barley-green gram crop rotation is
Correct Answer
(B) 400%
Explanation
Solution: 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%.
[#200] Pigeon Pea is . . . . . . . . crop.
Correct Answer
(D) Often Cross Pollinated
Explanation
Solution: 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.