Description : The transfer of minerals from top soil to subsoil through soil-water is called? (1) Percolation (2) Conduction (3) Leaching (4) Transpiration
Last Answer : (3) Leaching Explanation: Leaching refers to the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. As water from rain, flooding, or other sources seeps ... the underground water supply. Mineral nutrients lost from the soil system become unavailable for plant uptake.
Last Answer : Leaching
Description : Tea percolation employs (A) Liquid-liquid extraction (B) Leaching (C) Absorption (D) None of these
Last Answer : (B) Leaching
Description : Leaching of coarse solid lumps is also termed as (A) Decoction (B) Dissolution (C) Percolation (D) Agitation and settling
Last Answer : (C) Percolation
Description : Piping in a soil mass is a) Erosion of subsoil by the high velocities of flow of water through it when such velocities exceed a certain limit* b) Caused due to very low exit gradient c) ... connected pores d) Due to loss of the strength of cohesion less soil because of upward flow of of water
Last Answer : a) Erosion of subsoil by the high velocities of flow of water through it when such velocities exceed a certain limit*
Description : Subsoil plough is useful for — a. for deep ploughing b. to break hard pan of soil c. Shallow ploughin
Last Answer : b. to break hard pan of soil
Description : Which of the following processes are associated with plants during dark period? (1) Photosynthesis and respiration (2) Respiration and transpiration (3) Transpiration and conduction (4) Conduction and respiration
Last Answer : (4) Conduction and respiration Explanation: Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor ... the photosynthesis process cannot be happening without sun, so it exhales the carbon-dioxide itself.
Last Answer : Conduction and respiration
Description : Veins seen in the leaves, serve the function of (1) Photosynthesis (2) Transpiration (3) Storage (4) Conduction
Last Answer : Conduction
Description : Which one of the following processes during decomposition is correctly described? (a) Catabolism - Last step in the decomposition under fully anaerobic condition (b) Leaching - Water soluble inorganic ... of a dark coloured substance humus which undergoes microbial action at a very fast rate.
Last Answer : (c) Fragmentation – Carried out by organisms such as earthworm
Description : The high density of soil placed in a fill is desired in order to a) Increase its shear resistance* b) Reduce its shear resistance c) Promote future settlements d) Decrease percolation through the fill.
Last Answer : a) Increase its shear resistance*
Description : Pudding is done to— (A) Reduce percolation of water (B) Pulverise and levelling soil (C) Kill weeds (D) All of the above
Last Answer : (D) All of the above
Description : Downward entry and movement of water in soil surface is — a. Percolation b. Infiltration c. Permeability d. None of these
Last Answer : b. Infiltration
Description : Puddling is used to a) Reduce percolation of water b) Pulverize soil c) Level the field d) Compact the soil
Last Answer : ans a
Description : Puddling is done to: A. Reduce percolation of water B. Kill weeds C. Pulverize soil D. Level the field
Last Answer : A. Reduce percolation of water
Description : Puddling is done to: a) Reduce percolation of water b) Kill weeds c) Pulverise soil d) Level the fields
Last Answer : a) Reduce percolation of water
Description : Pudding is done to a) Reduce percolation of water b) Pulverise and levelling soil c) Kill weeds D) All of the above
Last Answer : D) All of the above
Description : Which soil would have the lowest percolation rate? -Other
Last Answer : clayey soil would have the lowest percolation rate
Description : which soil have the highest percolation rate ? -Other
Last Answer : sandy soil would have the highest percolation rate.
Description : What is Percolation rate of red soil?
Last Answer : 2
Description : The tillage implement used to break subsoil is
Last Answer : Ans.Chisel plough
Description : The hp required to operate subsoil plough a) 10-20hp b) 20-30hp c) 60-100hp d) 140-200hp
Last Answer : 60-100hp
Description : Chief function of phloem is conduction of: (a) Food (b) Minerals (c) Water (d) Air
Last Answer : Ans. ((a))
Description : Identify the incorrect statement. (a) Heartwood does not conduct water but gives mechanical support. (b) Sapwood is involved in conduction of water and minerals from root to leaf. (c) Sapwood is the innermost ... . (d) Due to deposition of tannins, resins, oils, etc., heartwood is dark in colour.
Last Answer : (c) Sapwood is the innermost secondary xylem and is lighter in colour
Description : Transfer of heat energy from a heater coil to the cooking vessel takes place through the process of- (1) Convection only (2) Conduction and convection only (3) Radiation and convection only (4) Convection, conduction and radiation
Last Answer : (3) Radiation and convection only Explanation: Conduction is the transfer of heat energy by direct contact, convection is the movement of heat by actual motion of matter; radiation is the transfer of energy with the help of electromagnetic waves.
Description : Heat transfer in the laminar sub-layer in case of a liquid flowing through a pipe, is mostly by (A) Eddies current (B) Conduction (C) Convection (D) None of these
Last Answer : (B) Conduction
Description : Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is (A) Thin walled having the value of Ao Ai /< 2 (B) Thick walled (C) Having the value of Ao /Ai > 2 (D) Both (B) and (C)
Last Answer : (A) Thin walled having the value of Ao Ai /< 2
Description : Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is (A) 0.2 (B) 0.4 (C) 0.6 (D) 0.8
Last Answer : (C) 0.6
Description : The process by which nutrient chemicals or contaminants are dissolved and carried away by water, or are moved into a lower layer of soil (a) mulching (b) desertification (c) incineration (d) leaching
Last Answer : (d) leaching
Description : Reclamation of saline soil which of the following practice is followed ? — a. Adequate drainage b. By good quality irrigation water c. Leaching of salts below root zone d. All of these
Last Answer : d. All of these
Description : Puddling is done to achieve : a. Soft soil bed b. Non leaching of water c. Size reduction of clods d. Conservation of moisture
Last Answer : b. Non leaching of water
Description : The process by which nutrient chemicals or contaminants are dissolved and carried away by water, or are moved into a lower layer of soil a) Mulching b) Desertification c) Incineration d) Leaching
Last Answer : d) Leaching
Description : Soil which is prone to intensive leaching due to rain is called- (1) Laterite (2) Black (3) Alluvial (4) Red
Last Answer : (1) Laterite Explanation: Leaching refers to the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. Laterite soils are formed soils under conditions of high temperature and heavy rainfall with alternate wet and dry periods. They are leached and are, thus, less fertile.
Description : Soil which is prone to intensive leaching due to rain is called (1) Laterite (2) Black (3) Alluvial (4) Red
Last Answer : Laterite
Description : Commercial flower crops are sometimes watered to cause leaching. This means: a. Watering to spread fertilizer nutrients more evenly throughout the plant root system b. Watering to remove excess soluble salts from ... only to wet the top 1/3 of the growing medium d. Watering by subsurface methods
Last Answer : Watering to remove excess soluble salts from the growing medium
Description : Name the soil which : (i) is good for the cultivation of cashew nuts. (ii) covers almost all of West Bengal. (iii) is a result of leaching. -Geography
Last Answer : (i) Laterite soil. (ii) Alluvial soil. (iii) Laterite soil.
Description : Which soil type is the result of intense leaching due to heavy rainfall ? -SST 10th
Last Answer : Laterite soil.
Description : The formation of laterite soil is mainly due to: (a) weathering (b) erosion (c) leaching (d) deposition
Last Answer : Ans: (c)
Description : Laterite soil develops as a result of : (1) deposits of alluvial (2) deposits of loess (3) leaching (4) continued vegetation cover
Last Answer : (3) leaching Explanation: Laterite has been derived from the Latin word 'later' which means brick. The laterite soil develops in areas with high temperature and heavy rainfall. This is ... of the micro organisms, particularly the decomposers, like bacteria, get destroyed due to high temperature.
Description : Soil formed by leaching and oxidation is – (1) Black soil (2) Laterite soil (3) Red soil (4) Montane soil
Last Answer : (2) Laterite soil Explanation: Laterisation is a form of chemical weathering that • involves oxidation, carbonation and leaching. This natural process results in the formation of Laterite soils.
Description : The problem of leaching of the soil is more pronounced in the areas how rainfall is there?
Last Answer : Heavy
Description : Migration of salt from sub-soil to the surface of a canal (a)Leaching. (b) Effervescence. (c)Fertilization. (d) All of the above.
Last Answer : (b) Effervescence
Description : Soil formed by leaching and oxidation is (1) Black soil (2) Laterite soil (3) Red soil (4) Montane soil
Last Answer : Laterite soil
Last Answer : leaching
Description : In the stratosphere, why does temperature increase with increasing height? (a) Conduction. (b) Convection. (c) Greater absorption of ultraviolet radiation at the top of the strato- sphere. (d ... you go up through the strato- sphere, thus the ideal gas law requires temperature to increase too.
Last Answer : Greater absorption of ultraviolet radiation at the top of the strato- sphere.
Description : The moisture deficit condition, results when the amount of water vapour available in the soil is not sufficient to meet the demand of potential evapo-transpiration
Last Answer : Ans.Drought
Description : Transpiration is least in (a) good soil moisture (b) high wind velocity (c) dry environment (d) high atmospheric humidity.
Last Answer : (d) high atmospheric humidity.
Description : Root pressure develops due to (a) passive absorption (b) active absorption (c) increase in transpiration (d) low osmotic potential in soil.
Last Answer : (b) active absorption
Description : ssertion: Running water cuts through the clayey soils and makes deep channels such as gullies. Reason: In the Chambal basin such lands are called Leaching Options: (a) Both A and R are true and R is the correct explanation of A ... of A. (c) A is true but B is false. (d) A is false but R is true.
Last Answer : (c) A is true but B is false.
Description : Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by (A) Conduction (B) Convection (C) Radiation (D) Both 'a' & 'b'
Last Answer : Option C