Soil Science - Study Mode
[#606] Science dealing with the origin or formation of soil from the unconsolidated parent material with special reference to factors and process of soil formation is known as
Correct Answer
(C) Soil genesis
Explanation
Solution: The science dealing with the origin or formation of soil from the unconsolidated parent material with special reference to factors and process of soil formation is known as Soil genesis or pedogenesis . It is influenced by a few factors that are intertwined in the evolution of soil, these are parent material, climate, topography, organisms and time.
[#607] Red soil is dominant in which state?
Correct Answer
(A) Tamil Nadu
Explanation
Solution: Red soil is dominant in Tamil Nadu. Red soil is formed in warm temperate and humid climates and comprises approximately 13% of the earth's soil. It contains thin organic and organic mineral layers of highly leached soil resting on a red layer of alluvium. It contains large amounts of clay and is generally derived by weathering of metamorphic rock.
[#608] Steamed bone meal contains
Correct Answer
(D) 30 - 35% P 2 O 5
Explanation
Solution: Steamed bone meal contains 30 - 35% P 2 O 5 . Bone meal is primarily a source of phosphorus, which helps plants in bearing flowers and fruits. However, Steamed bone meal helps in the easier release of phosphorus in the soil. It is an excellent source of phosphorus, calcium and other important minerals including some nitrogen which aids in microbial activity to aid healthy top growth and stimulate root growth in plants.
[#609] In soil, main process of heat transfer is
Correct Answer
(B) Conduction
Explanation
Solution: In soil, the main process of heat transfer is Conduction . Conduction is the mode of transfer of heat through matter without bulk motion of the matter. Moreover, it is the transfer of energy from the more energetic to less energetic particles of a substance due to interaction between the particles. Therefore in soils also the heat is transferred from one particle to another through the process of conduction.
[#610] Two successive units of Kaolinite are connected by means of
Correct Answer
(A) H-bond
Explanation
Solution: Kaolinite is a clay mineral. It is a layered silicate mineral, with one tetrahedral sheet of silica linked through oxygen atoms to one octahedral sheet of alumina octahedra. It is described as a 1 : 1 or TO clay mineral because its crystals consist of stacked TO layers. Each TO layer consists of a tetrahedral sheet composed of silicon and oxygen ions bonded to an octahedral sheet composed of oxygen, aluminium and hydroxyl ions. Two successive units of Kaolinite are connected by the means of an H-bond .