Recent questions tagged weed-management

In a 100 quadrat study of 1 sqm each Cyperus rotundus was found in 80 quadrats with overall of 5640 individuals. The frequency (%), abun dance and density (m2) would be a). 70.5, 80.0 and 56.4 b). 56.4, 70.5 and 80.0 c). 80.0, 70.5 and 56.4 d). 80.0, 56.4 and 70.5

Description : In a 100 quadrat study of 1 sqm each Cyperus rotundus was found in 80 quadrats with overall of 5640 individuals. The frequency (%), abun dance and density (m2) would be a). 70.5, 80.0 and 56.4 b). 56.4, 70.5 and 80.0 c). 80.0, 70.5 and 56.4 d). 80.0, 56.4 and 70.5

Last Answer : c). 80.0, 70.5 and 56.4

If Echinochloa falls in frequency class ‘E’, the weed community is said to be a). Contiguous b). Heterogenous c). Homogenous d). Random

Description : If Echinochloa falls in frequency class ‘E’, the weed community is said to be a). Contiguous b). Heterogenous c). Homogenous d). Random

Last Answer : c). Homogenous

Out of 50 quadrats studied, if Echinochloa is found in 26 quadrats, its frequency of occurrence would be a). 13% b). 26% c). 52% d). 68%

Description : Out of 50 quadrats studied, if Echinochloa is found in 26 quadrats, its frequency of occurrence would be a). 13% b). 26% c). 52% d). 68%

Last Answer : c). 52%

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%

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%

If the count of Echinochloa in weedy check is 70 and that in a treatment 25/m2, weed control efficiency will be a). 54.3% b). 64.3% c). 73.4% d). 79.6%

Description : If the count of Echinochloa in weedy check is 70 and that in a treatment 25/m2, weed control efficiency will be a). 54.3% b). 64.3% c). 73.4% d). 79.6%

Last Answer : b). 64.3%

If the yield from weed free is 3500 kg and that from weedy 1500 kg/ha, weed index would be a). 57.1% b). 133.3% c). 45.0% d). 25.6%

Description : If the yield from weed free is 3500 kg and that from weedy 1500 kg/ha, weed index would be a). 57.1% b). 133.3% c). 45.0% d). 25.6%

Last Answer : a). 57.1%

If the gross returns from an enterprise are INR 30000 and the net returns INR 20000, the benefit cost ratio based on net gain would be a). 3.0 b). 2.0 c). 1.0 d). 1.5

Description : If the gross returns from an enterprise are INR 30000 and the net returns INR 20000, the benefit cost ratio based on net gain would be a). 3.0 b). 2.0 c). 1.0 d). 1.5

Last Answer : b). 2.0

The cost of any activity measured in terms of the value of the next best alternative forgone a). Economic cost b). Variable cost c). Opportunity cost d). Marginal cost

Description : The cost of any activity measured in terms of the value of the next best alternative forgone a). Economic cost b). Variable cost c). Opportunity cost d). Marginal cost

Last Answer : c). Opportunity cost

A cost independent of the quantity of goods and services produceda). Variable cost b). Fixed cost c). Opportunity cost d). Marginal cos

Description : A cost independent of the quantity of goods and services produced a). Variable cost b). Fixed cost c). Opportunity cost d). Marginal cos

Last Answer : b). Fixed cost

The additional cost from taking a cost of action is called a). Total cost b). Opportunity cost c). Variable cost d). Marginal cost

Description : The additional cost from taking a cost of action is called a). Total cost b). Opportunity cost c). Variable cost d). Marginal cost

Last Answer : d). Marginal cost

Marginal cost is defined as____ a). Cost that arises when the quantity produced changes by one unit b). Cost of producing one more unit of a good c). Increase in cost that accompanies a unit in crease in output d). All the above

Description : Marginal cost is defined as____ a). Cost that arises when the quantity produced changes by one unit b). Cost of producing one more unit of a good c). Increase in cost that accompanies a unit in crease in output d). All the above

Last Answer : d). All the above

Economic cost is the sum of________ a). Variable and fixed costs b). Variable, fixed and opportunity costs c). Fixed and opportunity costs d). Variable, fixed and marginal costs

Description : Economic cost is the sum of________ a). Variable and fixed costs b). Variable, fixed and opportunity costs c). Fixed and opportunity costs d). Variable, fixed and marginal costs

Last Answer : b). Variable, fixed and opportunity costs

. A ceremonial weed a). Cynodon dactylon b). Datura stramonium c). Tagetus sp d). All of these

Description : . A ceremonial weed a). Cynodon dactylon b). Datura stramonium c). Tagetus sp d). All of these

Last Answer : d). All of these

A ceremonial weed a). Asparagus racemosus (Shatawari) b). Cynodon dactylon (Dhoob ghaas) c). Nelumbo nucifera (Lotus flower) d). All of these

Description : A ceremonial weed a). Asparagus racemosus (Shatawari) b). Cynodon dactylon (Dhoob ghaas) c). Nelumbo nucifera (Lotus flower) d). All of these

Last Answer : d). All of these

A ceremonial weed a). Asparagus racemosus (Shatawari) b). Cynodon dactylon (Dhoob ghaas) c). Both a and b d). Digitaria sanguinalis

Description : A ceremonial weed a). Asparagus racemosus (Shatawari) b). Cynodon dactylon (Dhoob ghaas) c). Both a and b d). Digitaria sanguinalis

Last Answer : c). Both a and b

To manage grassy weed flora in barley which of the herbicides is to be applied a). Pendimethalin b). Isoproturon c). a and b d). Metsulfuron

Description : To manage grassy weed flora in barley which of the herbicides is to be applied a). Pendimethalin b). Isoproturon c). a and b d). Metsulfuron

Last Answer : c). a and b

Which of the herbicides can be used in gram crop? a). Pendimethalin b). Metolachlor c). Fluchloralin d). All

Description : Which of the herbicides can be used in gram crop? a). Pendimethalin b). Metolachlor c). Fluchloralin d). All

Last Answer : d). All

To manage mixed weed flora in barley which of the herbicides is to be applied a).2,4-D b). Isoproturon c). a and b as tank mix d). None of these

Description : To manage mixed weed flora in barley which of the herbicides is to be applied a).2,4-D b). Isoproturon c). a and b as tank mix d). None of these

Last Answer : c). a and b as tank mix

To control broad-leaved weeds in barley, which of the herbicide is most suitable a). 2,4-D b). Metsulfuron c). Alachlor d). Both a and b

Description : To control broad-leaved weeds in barley, which of the herbicide is most suitable a). 2,4-D b). Metsulfuron c). Alachlor d). Both a and b

Last Answer : d). Both a and b

Tolerance of the rice plants to molinate is due to a).Reverse metabolism b). Protoplasmic resistance c). Conjugation d). Slow translocation

Description : Tolerance of the rice plants to molinate is due to a).Reverse metabolism b). Protoplasmic resistance c). Conjugation d). Slow translocation

Last Answer : b). Protoplasmic resistance

A selectivity achieved due to manipulation of time of application is called a).Biochemical b). Chronological c). Chemical d). Physical

Description : A selectivity achieved due to manipulation of time of application is called a).Biochemical b). Chronological c). Chemical d). Physical

Last Answer : b). Chronological

. A pigment inhibitor a). Clomazone b). Alachlor c). Trifluralin d). All

Description : . A pigment inhibitor a). Clomazone b). Alachlor c). Trifluralin d). All

Last Answer : a). Clomazone

A cell membrane disrupter a).Paraquat b). Acifluorfen c). Difenzoquat d). All A cell membrane disrupter a).Paraquat b). Acifluorfen c). Difenzoquat d). All

Description : A cell membrane disrupter a).Paraquat b). Acifluorfen c). Difenzoquat d). All

Last Answer : d). All

A lipid inhibitor a).Diclofop b). Quizalofop c). Sethoxydim d). All

Description : A lipid inhibitor a).Diclofop b). Quizalofop c). Sethoxydim d). All

Last Answer : d). All

A amino acid derivative a).Paraquat b). Glyphosate c). 2,4-D d). None of these

Description : A amino acid derivative a).Paraquat b). Glyphosate c). 2,4-D d). None of these

Last Answer : b). Glyphosate

An important benzoic acid herbicide a).Dicamba b). 2,4-D c). Atrazine d). None of these

Description : An important benzoic acid herbicide a).Dicamba b). 2,4-D c). Atrazine d). None of these

Last Answer : a).Dicamba

Dealkylation involving removal of alkyl side chains is common in case of a). Triazines b). Carbamates c). Donitroanilines d). All

Description : Dealkylation involving removal of alkyl side chains is common in case of a). Triazines b). Carbamates c). Donitroanilines d). All

Last Answer : d). All

Hydroxylation is common among a). Phenoxys b). Benzoics c). Substituted ureas d). All

Description : Hydroxylation is common among a). Phenoxys b). Benzoics c). Substituted ureas d). All

Last Answer : d). All

Decarboxylation is most common in a). Phenoxy’s b). Benzoics c). Substituted ureas d). All

Description : Decarboxylation is most common in a). Phenoxy’s b). Benzoics c). Substituted ureas d). All

Last Answer : d). All

Dehalogenation is the most common inacti vation reaction in which of the following a).Simazine b). Glyphosate c). Pendimethalin d). Bispyribac

Description : Dehalogenation is the most common inacti vation reaction in which of the following a).Simazine b). Glyphosate c). Pendimethalin d). Bispyribac

Last Answer : a).Simazine

A herbicide move through water conducting tissue a).Paraquat b). DSMA c). Glyphosate d). Atrazine

Description : A herbicide move through water conducting tissue a).Paraquat b). DSMA c). Glyphosate d). Atrazine

Last Answer : d). Atrazine

A herbicide move through sap conducting tissue a).Paraquat b). Diquat c). MSMA d). Glyphosate

Description : A herbicide move through sap conducting tissue a).Paraquat b). Diquat c). MSMA d). Glyphosate

Last Answer : d). Glyphosate

. Through wetting of all foliage is unneces sary with which of the following a).glyphosate b). paraquat c). diquat d). None of these

Description : . Through wetting of all foliage is unneces sary with which of the following a).glyphosate b). paraquat c). diquat d). None of these

Last Answer : a).glyphosate

A herbicide requiring good spray coverage of all foliage for effective control of a weed population a).Paraquat b). Glyphosate c). Atrazine d). Isoproturon

Description : A herbicide requiring good spray coverage of all foliage for effective control of a weed population a).Paraquat b). Glyphosate c). Atrazine d). Isoproturon

Last Answer : a).Paraquat

Competitive ability of the crops in decreas ing order a). barley>rye>wheat >oats b). oats>wheat> rye> barley c). rye>barley>oats> wheat d).wheat>oats>barley >rye

Description : Competitive ability of the crops in decreas ing order a). barley>rye>wheat >oats b). oats>wheat> rye> barley c). rye>barley>oats> wheat d).wheat>oats>barley >rye

Last Answer : a). barley>rye>wheat >oats

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

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)

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

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

Having higher phosphorus content a). Amaranthus b). Setaria c). Chenopodium d). Digitaria

Description : Having higher phosphorus conten a). Amaranthus b). Setaria c). Chenopodium d). Digitaria

Last Answer : d). Digitaria

A potassium lover a). Chenopodium b). Digitaria c). Amaranthus d). Setaria

Description : A potassium lover a). Chenopodium b). Digitaria c). Amaranthus d). Setaria

Last Answer : a). Chenopodium

A weed accumulate over 550 ppm of Zn in its dry matter a). Digitaria b). Setaria lutescens c). Portulaca d). Chenopodium

Description : A weed accumulate over 550 ppm of Zn in its dry matter a). Digitaria b). Setaria lutescens c). Portulaca d). Chenopodium

Last Answer : b). Setaria lutescens

A nitrophyll a). Amaranthus b). Setaria lutescens c). Digitaria d). Chenopodium

Description : A nitrophyll a). Amaranthus b). Setaria lutescens c). Digitaria d). Chenopodium

Last Answer : a). Amaranthus

To compete derived from competere which is a a). Greek word b). Spanish word c). Latin word d). None of these

Description : To compete derived from competere which is a a). Greek word b). Spanish word c). Latin word d). None of these

Last Answer : c). Latin word

The striving of two or more individuals for the same object a). Allelopathy b). Competition c). Co-operation d). None of these

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

A natural pre-emergence weed control in turf grass a). Corn gluten meal b). Bialaphos c). Sulcotrione d). Cinmethylin

Description : A natural pre-emergence weed control in turf grass a). Corn gluten meal b). Bialaphos c). Sulcotrione d). Cinmethylin

Last Answer : a). Corn gluten meal

Allelochemicals liberate through volatiliza tion a). Terpinoid b). Alkaloids c). Tannins d). Lactones

Description : Allelochemicals liberate through volatiliza tion a). Terpinoid b). Alkaloids c). Tannins d). Lactones

Last Answer : a). Terpinoid

The crops known for autotoxicity a). Lucerne and wheat b). Berseem and oats c). Rice and soybeans d). None of these

Description : The crops known for autotoxicity a). Lucerne and wheat b). Berseem and oats c). Rice and soybeans d). None of these

Last Answer : a). Lucerne and wheat

The ecological phenomenon of plant-plant interference a). Competition b). Allelopathy c). Both d). None

Description : The ecological phenomenon of plant-plant interference a). Competition b). Allelopathy c). Both d). None

Last Answer : c). Both

Herbicide antidote interactions are a). synergistic b). antagonistic c). Enhancement d). None of these

Description : Herbicide antidote interactions are a). synergistic b). antagonistic c). Enhancement d). None of these

Last Answer : b). antagonistic

A prosafener among the following a). Fenclorim b). benoxacor c). Fluxofenim d). L-oxothiazolidine-4-carboxylate

Description : A prosafener among the following a). Fenclorim b). benoxacor c). Fluxofenim d). L-oxothiazolidine-4-carboxylate

Last Answer : d). L-oxothiazolidine-4-carboxylate

The type of research where the researcher look for loopholes in patents or methods to develop products similar to those already in the market is called a). Me-too b). mimic c). Emperical d). None of these

Description : The type of research where the researcher look for loopholes in patents or methods to develop products similar to those already in the market is called a). Me-too b). mimic c). Emperical d). None of these

Last Answer : a). Me-too

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