Description : Auto allelopathy existed in a). Wheat b). alfaalfa c). cowpea d). all
Last Answer : d). all
Description : .In functional allelopathy a). Toxic substances are released as such from the plants b). A precursor is released and is converted into active substances by some microorganisms c). No release of any toxic substance d). release of nitrogen from nodule of legume takes place
Last Answer : b). A precursor is released and is converted into active substances by some microorganisms
Description : . Trap crop for striga is a). Sunflower b). Cotton c). Cowpea d). All of these
Last Answer : d). All of these
Description : Which crop exhibit direct allelopathy? a). Sorghum b). Maize c). Lentil d). Alfalfa
Last Answer : a). Sorghum
Description : . A crop has residual allelopathy on wheat a). Rice b). Lentil c). Maize d). Sorghum
Last Answer : b). Lentil
Description : The grain legume which is also grown as an oilseed crop is (a) Chickpea (b) Urd bean (c) Soybean (d) Lentil
Last Answer : (a) 1880
Description : Trap crop for Cuscuta sp a). Small grains b). Chickpea c). Mustard d). All
Last Answer : d). All
Description : .Phenolic acid as root exudates of which crop has detrimental effects on wild mustard? a). Wheat b). Oats c). Chickpea d). a & b
Last Answer : d). a & b
Description : .Strigol, a witch weed stimulant isolated from the root exudates of a). Cotton b). Sorghum c). Alfaalfa d). Cowpea
Last Answer : a). Cotton
Description : The striving of two or more individuals for the same object a). Allelopathy b). Competition c). Co-operation d). None of these
Last Answer : b). Competition
Description : The ecological phenomenon of plant-plant interference a). Competition b). Allelopathy c). Both d). None
Last Answer : c). Both
Description : The term, allelopathy came into exis tence in a). 1937 AD b). 500 BC c). 1974 AD d). 1832 AD
Last Answer : a). 1937 AD
Description : The term, allelopathy was given by a). Rice b). Molisch c). Decondole d). Democritus
Last Answer : b). Molisch
Description : .Which among the following crops ex hibits allo-allelopathy? a).Maize b). Sorghum c). Rye d). All
Description : The term allelopathy was given by a). Rice (1974) b). Molisch (1937) c). Decondole (1832) d). Molisch (1930)
Last Answer : b). Molisch (1937)
Description : 2,4-D is injurious to a). Cotton b). Mustard c). Chickpea d). All
Description : Salt tolerant crop is— (A) Cowpea (B) Field pea (C) Garlic (D) Longmelon
Last Answer : (A) Cowpea
Description : The crop which is good for diabetic patient: (a) Green gram (b) Groundnut (c) soybean (d) cowpea
Last Answer : (c) soybean
Description : A companion crop a). Hairy vetch b). Winter rye c). Cowpea d). All
Description : The type of crop which is able to fix nitrogen from air is known as (a) Legume (b) Rice (c) Tuber (d) Potato
Last Answer : Ans: (a)
Description : In the context of India, which of the following is/ are considered to be practice(s) of eco-friendly agriculture? 1. Crop diversification 2. Legume intensification 3. Tensiometer use 4. Vertical farming Select the correct answer using the ... a) 1, 2 and 3 only b) 3 only c) 4 only d) 1, 2, 3 and 4
Last Answer : d) 1, 2, 3 and 4
Description : If weed population is 70/m2 and the crop 140/ m2, weed intensity would be a). 33.3% b). 66.6% c). 50% d). 73.4%
Last Answer : a). 33.3%
Description : Which of the herbicides can be used in gram crop? a). Pendimethalin b). Metolachlor c). Fluchloralin d). All
Description : A curvilinear relationship between weed density and crop yield was reported by a). Zimdahl 1980 b). Roberts and Bonds (1975) c). Cousens et al (1985) d). None of these
Last Answer : b). Roberts and Bonds (1975)
Description : The sigmoidal relationship between weed density and crop yield was proposed by a).Zimdahl 1980 b). Roberts and Bonds (1975) c). Cousens et al (1985) d). None of these
Last Answer : a).Zimdahl 1980
Description : . A non-competitive crop requiring weed free period of three or more months a). Maize b). Rice c). Soybean d). Onion
Last Answer : d). Onion
Description : A period in the ontogeny of crop at which maximum crop weed competition occurs is called a). Economic threshold b). Gain threshold c). Competitive threshold d). None
Last Answer : d). None
Description : The effective solution to manage weed shifts a). Herbicide combinations b). Herbicide rotations c). Crop rotations d). All
Description : The competitive crop requiring weed free period of about 3-4 weeks a). Soybean b). Carrot c). Garlic d). Onion
Last Answer : a). Soybean
Description : . A shortest time span in the life cycle of a crop when weeding results in highest eco nomic returns a). Economic threshold b). Critical period c). Competitive threshold d). None of these
Last Answer : b). Critical period
Description : Propanil has to be applied to rice crop at a). One leaf stage b). 2-3 leaf stage c). 4 leaf stage d). None of these
Last Answer : b). 2-3 leaf stage
Description : Which formulation of 2,4-D has fastest ab sorption by crop plants? a). Ethyl ester b). Dimethylamine c). Na salt d). All
Last Answer : a). Ethyl ester
Description : Persistence herbicides pose hazard in soil when a). High persistence herbicides are used b). Crop failure necessitate re-planting c). Susceptible crop follows a short crop d). All
Description : Trap crop for Orobanche a). Linseed b). Sunhemp c). Chillies d). All of these
Description : November sown berseem crop induces the weed a). Chenopodium sp b). Anagallis sp c). Vicia sp d). All of these
Description : Complete crop failure is caused in which of the following crops a). Vegetables b). Upland rice c). both a and b d). Wheat
Last Answer : c). both a and b
Description : The official peer-reviewed Journal of the EWRS (European Weed Research Society) is a). Journal of Crop and Weed b). Weed Research c). Weed Science
Last Answer : b). Weed Research
Description : .Which crop is an indicator plant for the bio assay of Triazines and Aliphatics? a). Sugarbeet b). Sorghum c). Cotton d). Mustard
Last Answer : a). Sugarbeet
Description : Root exudates of which crop has allelo pathic effect on Chenopodium album? a). Wheat b). Oat c). Pea d). All
Description : Glufosinate (pat) resistant trait for maize crop first sale in which year ? a).2000 b).1992 c).1995 d).1997
Last Answer : d).1997
Description : Glyphosate (Cp4 epsps) resistant trait for sugarbeet crop first sale in which year ? a).1998 b).1986 c).2007 d).2003
Last Answer : c).2007
Description : Gluphosate + Glufosinate (Double Stack) is resistant trait of which crop a).Canola b). Sugarbeet c). Soybean d).Maize
Last Answer : d).Maize
Description : Glufosinate (Bar) is resistant trait of which crop a).Soybean b).Sugarbeet c).Maize d).Cotton
Last Answer : d).Cotton
Description : Among the herbicide resistant crops, which crop was the most dominant transgenic crops in 2010 a).Soybean b). Cotton c). Maize d).Sugarbeet
Last Answer : a).Soybean
Description : Bromoxynil (Bxn) is resistant trait of which crop a).Soybean b).Sugarbeet c).Maize d).Cotton
Description : A herbicide applied to the soil before planting a crop is called a a). pre-emergence b). Post-emergence c). Pre-plant d). None
Last Answer : c). Pre-plant
Description : Herbicide Antidotes a). protect crop plants b). harm crop plants c). Protect weeds d). Harm weeds
Last Answer : a). protect crop plants
Description : Critical period of crop weed competition in sugarcane is a). 30-40 days b). 30-120 days c). 10-40 days d). 15-30 days
Last Answer : b). 30-120 days
Description : The period at which maximum crop weed competition occurs is a). Critical period b). Dormancy c). Flaming d).Threshold
Last Answer : a). Critical period
Description : One to two flushes of weeds are destroyed before planting of crop is called a). Stale seed bed b). Blind hoeing c). Weeding d). Summer ploughing
Last Answer : a). Stale seed bed