Soil Science - Study Mode
[#951] Total biomass of earthworm in soil ranges from (kg/ha)
Correct Answer
(B) 110 - 1100
Explanation
Solution: Earthworms increase nutrient availability, better drainage, and more stable soil structure, these excrete wastes in form of casts, a type of soil aggregate. The enhancement of the number of earthworms and their biomass consequently affect soil fertility.
The total biomass of earthworms in soil ranges from 110 - 1100 kilometer per hector.
[#952] In case of Igneous rock, if cooling of magma is slow, then that rock's texture will be
Correct Answer
(A) Coarse
Explanation
Solution: Igneous rocks are rocks formed from the crystallization of a liquid. It is divided into two categories, Intrusive crystallizing from magma beneath the earth's surface. And extrusive or volcanic rocks lava at the earth's surface. In the case of igneous rock, if the cooling of magma is slow, then that rock’s texture will be coarse . If the magma cools slowly underneath the surface of the earth it forms granite with relatively large crystals. And if the magma cools rapidly on the surface of the earth the rock forms which is called lava.
[#953] How much muriate of potash will be required to supply 50 kg K 2 O/ha
Correct Answer
(C) 83.3 kg
Explanation
Solution: Muriate of potash or potassium chloride is a red-white crystal containing 60% potassium oxide. It is extensively used for fertilizing pastures, sugar cane, fruit trees, vegetables and other field crops. If 50 kg of K 2 O/ha is needed to be supplied we need 83.3 kg of potash as 60% of 83.3 kg will be approximately 50, thus this much is needed.
[#954] Moisture content (%) of well decomposed Compost?
Correct Answer
(C) 15 - 25%
Explanation
Solution: Compost is a mix of decaying nutrient-rich soil with a medium density that is naturally made using oxygen, bacteria, water and organic materials. It takes around 6 months to be well decomposed. The moisture content of well-decomposed compost is 15 - 25%. The organic material being decomposed has to be moist but not too wet.
[#955] A branch of science that deals with the study of origin of the soil, its classification and description is known as
Correct Answer
(C) Pedology
Explanation
Solution: A branch of science that deals with the study of the origin of the soil, its classification, and description are known as Pedology . It is the discipline within soil science that focuses on understanding and characterizing soil formation, evolution, and the theoretical frameworks for modeling soil bodies, often in the context of the natural environment.