Soil Science - Study Mode

[#316] Oldest surviving long term manurial trial in India is located at . . . . . . . . initiated in 1909.
Correct Answer

(B) Coimbatore

Explanation

Solution: The oldest surviving long-term manurial trial in India is located at Coimbatore initiated in 1909. The permanent Manurial Experiment (PME) was maintained at Tamil Nadu Agricultural University, Coimbatore. It is the oldest one having historical importance in India as it has completed 100 years of continuous experimentation.

[#317] A soil test rating of 'High' means fertiliser dose is
Correct Answer

(A) Less

Explanation

Solution: A soil test determines fertility and the expected growth potential of the soil which indicates nutrient deficiencies, potential toxicities from excessive fertility and inhibitions from the presence of non-essential trace minerals. The test is used to mimic the function of roots to assimilate minerals. A soil test rating of ‘High’ means fertilizer dose is less which means the soil is good enough and fertilizer and nutrient requirements from the outer source are less.

[#318] In neutron moisture meter energy of thermalized electron is
Correct Answer

(C) 0.03 eV

Explanation

Solution: A neutron moisture meter is a moisture meter utilizing neutron scattering. The meters are most frequently used to measure the water content in soil or rock. Water due to its hydrogen content, is an effective neutron moderator, sowing high-energy neutrons. With a source of high-energy neutrons and a detector sensitive to low-energy neutrons, the detection rate will be governed by the water content of the soil between the source and the detector. In a neutron moisture meter, the energy of the thermalized electron is 0.03 eV .

[#319] Thomasslag contains . . . . . . . . % P 2 O 5
Correct Answer

(C) 20%

Explanation

Solution: Thomas slag is a finely powdered basic slag obtained in the Thomas-Gilchrist process. Chemically it is tetra calcium phosphate, Ca 4 (PO 4 ) 2 O, (4CaO·P 2 O 5 ). It is found as the mineral hilgenstockite, which is formed in industrial phosphate-rich slag. It contains 20% of P 2 O 5 .

[#320] Example of Nitrification Inhibitors is
Correct Answer

(D) All of the above

Explanation

Solution: Nitrification inhibitors are those that slow down the microbial conversion of ammonium-N to Nitrate-N. N-serve, AM (2-amino 4-chloro 6-methyl pyrimidine) and Karanj Oil cake are commonly used Nitrification inhibitors.