Description : A system of tillage in which organic residues are not inverted into the soil and used as a protective cover against erosion and evaporational losses of soil moisture?
Last Answer : Ans.Conservation tillage or stubble mulch tillage
Description : Among the following crop rotations, which is good for increasing soil nutrient status? a. Rice- wheat b. Groundnut- wheat c. Pearl millet- wheat d. Sorgham- wheat e. None of these
Last Answer : b. Groundnut- wheat
Description : Among the following crop rotations, which is good for increasing soil Nutrient status? 1) Rice-Wheat 2) Groundnut-Wheat 3) Pearlmillet-Wheat 4) Sorghum-Wheat
Last Answer : 2) Groundnut-Wheat
Description : Organic farming excludes the application of
Last Answer : Ans.Fertilizers (V) Irrigation Water Management
Description : The crops leave the field exhaustive after growing?
Last Answer : Ans.Exhaustive Crops
Description : The quantity of water (gm) necessary for a plant to produce 1 kg of dry matter is known as
Last Answer : Ans.Transpiration coefficient
Description : The development stage of a plant after which no further increase in dry matter occurs in the economic part is known as
Last Answer : Ans.Physiological maturity (II) Modern Concepts of Tillage
Description : The most popular mechanical measure to control soil erosion and conserve is
Last Answer : Ans.Contour Bunding
Description : About 50-75% of soil erosion by wind is carried out by
Last Answer : Ans.Saltation
Description : What are the types of soil movement in the process of wind erosion?
Last Answer : Ans.Saltation, Suspension and Surface creep
Description : Detachment and transportation of top soil particles by wind and or by water is known as.
Last Answer : Ans.Soil erosion
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 : A period in which the available soil moisture is enough to meet the evapotranspiration requirement of dry land crops
Last Answer : Ans.Length of growing period
Description : The process in which soil water lost from leaves of plants in the form of vapour and enters the surrounding atmosphere.
Last Answer : Ans.Transpiration
Description : When water is held tightly as thin film around soil particles by adsorption forces and flows at gravity of > -31 bar, is called
Last Answer : Ans.Hygroscopic water
Description : The water, retained by the soil in capillary pores (micropores), against gravity (-1/3 to - 31 bar) by the force of surface tension
Last Answer : Ans.Capillary water
Description : The moisture content of a soil at which plants permanently wilt and will not recover.
Last Answer : Ans.Permanent wilting point (PWP)
Description : The amount of soil moisture or water content held in soil after excess water has drained away is called
Last Answer : Ans.Field capacity (FC)
Description : Which of the following is a method of indirect measurement of soil moisture?
Last Answer : Ans.Neutron moisture meter
Description : Soil moisture content is determined by
Last Answer : Ans.Tensiometer (at 0.85 bar)
Description : Soil crusting reduces
Last Answer : Ans.Infiltration
Description : The percentage of applied irrigation water stored in the soil and made available for consumptive use by the crop
Last Answer : Ans.Irrigation Efficiency
Description : The flow of excess water from the field after saturation of soil.
Last Answer : Ans.Runoff
Description : Vertical movement of water or downward movement of water from different soil layer is called as
Last Answer : Ans.Percolation
Description : First entry of water from the upper layer of soil is known as
Description : The cropping system beneficial to prevent soil erosion due to winds is
Last Answer : Ans.Strip cropping
Description : Potato crop favours the soil for best growth
Last Answer : Ans.Sandy loam soil
Description : The best soil for cultivation of cotton
Last Answer : Ans.Black cotton soil
Description : Most suitable soil for groundnut cultivation
Description : Best soil for cultivation of chickpea?
Last Answer : Ans.Light alluvial soil (a loose and well aerated soil)
Description : Rice varieties suitable for Saline-alkaline soil are
Last Answer : Ans.CSR-10, CSR-13, CSR-27
Description : Anaerobic environment in rice soil is responsible for gaseous loss of fertilizer nitrogen by
Last Answer : Ans.Denitrification
Description : The tillage referred as no tillage in which the crop is planted in unprepared soil
Last Answer : Ans.Zero tillage
Description : An ideal condition of soil for crop growth?
Last Answer : Ans.Seed-bed
Description : The optimum range of available soil moisture for convenient and effective ploughing
Last Answer : Ans.50-75%
Description : The tillage operation mainly aims to break, open and turn the soil
Last Answer : Ans.Primary/tillage
Description : The good physical condition of soil after tillage is
Last Answer : Ans.Tilth
Description : The mechanical manipulation of the soil is k/s as
Last Answer : Ans.Tillage
Description : Generally, the third row of crop is removed or growing of crop in pair row and the third row is escaped with an object to conserve the soil moisture in Dryland areas?
Last Answer : Ans.Paired row Crops
Description : Such crops are grown to conserve the soil moisture through their ground covering foliage?
Last Answer : Ans.Mulch Crops
Description : A close-growing crop, grown primarily to improve and protect the soil from erosion through their ground covering foliage and/or rootmats between periods of regular crop production?
Last Answer : Ans.Cover Crops
Description : A branch of agricultural science which deals with principles and practices of soil, water and crop management.
Last Answer : Ans.Agronomy
Description : Pheretima posthuma is highly useful as (a) their burrows make the soil loose (b) they make the soil porous, leave their castings and take organic debris in the soil (c) they are used as fish meal (d) they kill the birds due to biomagnification of chlorinated hydrocarbons.
Last Answer : (b) they make the soil porous, leave their castings and take organic debris in the soil
Description : Positive values for the rotation angle θ defines a.Counter clockwise rotations about the end points b.Counter clockwise translation about the pivot point c.Counter clockwise rotations about the pivot point d.Negative direction
Last Answer : c.Counter clockwise rotations about the pivot point
Description : In hydrogen atom, an electron is revolving in the orbit of radius `0.53 Å` with `6.6xx10^(15) rotations//second`. Magnetic field produced at the centr
Last Answer : In hydrogen atom, an electron is revolving in the orbit of radius `0.53 Å` with `6.6xx10^(15) rotations//second`. ... 5 Wb//m^(2)` D. `125 Wb/m^(2)`
Description : Do rotations preserve or change the orientation of the figure?
Last Answer : They change the orientation.
Description : What are the planets period of rotations?
Last Answer : What is the answer ?
Description : Independent displacement components at each joint of a rigid-jointed plane frame are (A) Three linear movements (B) Two linear movements and one rotation (C) One linear movement and two rotations (D) Three rotations
Last Answer : (B) Two linear movements and one rotation
Description : The effective solution to manage weed shifts a). Herbicide combinations b). Herbicide rotations c). Crop rotations d). All
Last Answer : d). All
Description : Which of the following statement(s) is(are) true? I. Two successive translations are additive. II. Two successive rotations are additive. III. Two successive scaling operations are multiplicative. (A) I and II (B) I and III (C) II and III (D) All the above.
Last Answer : (D) All the above.