Soil Science - Study Mode
[#191] In sugarcane, which leaf is most appropriate for total tissue test
Correct Answer
(D) Fourth fully developed leaf from the top
Explanation
Solution: In sugarcane, the fourth fully developed leaf from the top is most appropriate for the total tissue test. The fully developed leaf will show the exact nutrient values in the plant and give more accurate values. A tissue test through leaf analysis is done to assess the nutrient need of the plant.
[#192] Rendzina Soils come under
Correct Answer
(C) Calcimorphic
Explanation
Solution: Rendzina is a soil type recognized in the various soil classification system, these are humus-rich shallow soils that are usually formed from carbonate or sulphate-rich plant material. These soils are rich in calcium and magnesium, but potassium content is low. Rendzina soils are usually poorly suited to agricultural use. And it comes under Calcimorphic .
[#193] Sandstone, dolomite rocks are
Correct Answer
(B) Sedimentary rock
Explanation
Solution: Sandstone and dolomite rocks are Sedimentary rocks. Sandstone is a classic sedimentary rock composed mainly sand sized silicate grains. Dolomite is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite. Dolomite is resistant to erosion.
[#194] Energy content is more in case of
Correct Answer
(B) X-ray
Explanation
Solution: X-rays are high-energy rays. The energy content of X-rays is quite more than infrared, gamma, and cosmic rays. X-rays have a wavelength ranging from 10 picometers to 10 nanometers, frequencies in the range of 30 petahertz to 30 exahertz and energy in the range of 145 eV to 124 keV .
[#195] The peeling off the plates from parent rock due to differential expansion and contraction of minerals as a result of changes in temperature, is called as
Correct Answer
(B) Exfoliation
Explanation
Solution: The peeling off the plates from parent rock due to differential expansion and contraction of minerals as a result of temperature changes is called Exfoliation. It is a process in which large flat or curved sheets of rock fracture and are detached from the outcrop due to pressure release. It mostly occurs when the temperature of rocks changes rapidly that can expand or crack the rocks.