Soil Science - Study Mode
[#601] Soil series occurring together in repeating Geographic pattern are grouped into
Correct Answer
(B) Soil association
Explanation
Solution: Soil series occurring together in repeating geographic patterns are grouped into Soil association . It is a group of closely associated soil profiles on one parent material and one soil zone. The soil association developed the world's first organic standards in 1960. A place name is assigned to each soil association. That place name is usually the name of a town near where the soil was first recognized and described by soil surveyors.
[#602] Intrinsic permeability is an attribute of
Correct Answer
(A) Soil matrix
Explanation
Solution: Intrinsic permeability is an attribute of the Soil matrix . Intrinsic permeability is a measure of the relative ease with which a porous medium can transmit fluid under a potential gradient and is a property of the medium alone. Whereas, the soil matrix is the solid phase of soils and comprise the solid particles that makeup soils.
[#603] Nitrolim fertilizer is
Correct Answer
(B) CaCN 2 + C
Explanation
Solution: Nitrolim fertilizer is calcium cyanamide an inorganic compound with the formula CaCN 2 + C. It is the calcium salt of the cyanamide anion. It reacts with water to form ammonia. This chemical is used as a fertilizer and is commercially known as nitrolime. It was first synthesized in 1898 by Adolph Frank and Nikodem Caro.
[#604] Rock phosphate has chemical composition
Correct Answer
(B) Ca 3 (PO 4 ) 2
Explanation
Solution: Rock phosphate is a non detrital sedimentary rock that contains high amounts of phosphate minerals. Rock phosphate has a chemical composition of Ca 3 (PO 4 ) 2 . the phosphate content of phosphorite varies greatly from 4% to 20% phosphorous pentaoxide (P 2 O 5 ). Around 90% of rock phosphate production is used for fertilizer and animal feed supplements and the balance for industrial chemicals.
[#605] Zinc sulphate monohydrate contains Zn%
Correct Answer
(D) 35
Explanation
Solution: Zinc sulphate monohydrate contains approximately 35% of Zinc and around 15% Sulphur. It is used as a basal application and as a foliar spray to fulfill the deficiency of Zinc and Sulphur in plants. It is an inorganic compound that was historically known as "white vitriol" and it has a variety of uses in medicines, industry and more.