3551. The role of boron and zinc has been recognized in crop_________________?
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A. Mustard

B. None of these

C. Sugarcane

D. Rice
3552. Allelocliemicals may enter in the soil through the process of_________________?
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A. Root exudation

B. Mass flow

C. Diffusion

3553. In Raygistan area which districts of Sindh are included______________?
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A. Hyderabad and N.Shah

B. Sukkar and. Khairpur

C. Karachi

D. None of the above

3554. Zinc deficiency is generally observed in_________________?
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A. Vegetables

B. Race

C. Cotton

D. Wheat

3555. Soil water in excess of hygroscopic and capillary water which moves downward through the soil by the force of gravity is called______________?
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A. sub-surface water

B. Gravitational water

C. Capillary water

D. Run off water

3556. High density grains are found mostly at___________________?
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A. All the above

B. Middle of panicle

C. Top of panicle

D. Bottom of panicle

3557. Auxins and cytokinins are__________________?
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A. Herbicides

B. Fungicides

C. Growth regulators

D. Insecticides

3558. Allelopathy interaction between plants playa crucial role in___________________?
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A. Ecosystems

B. Community

C. Both a and b

D. non of there

3559. Seed rat of American cotton per acre is__________________?
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A. 10-12 kg

B. non of these

C. 6-8 kg

D. 15-18 kg

3560. In wheat, production of certified seed needs an isolation distance of____________________?
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A. 4 Meters

B. 2 Meters

C. 5 Meters

D. 3 Meters
3561. The experimental design which control fertility level in two directions is known as________________?
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A. RBD

B. LSD

C. SPD

D. AD

3562. The allelochemicals are broadly classified as_______________?
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A. Phenolics and. terpenoids

B. Trytophan

C. non of there

D. Cytokinin and ethylene

3563. Plants having no defined limits of vegetative and reproductive element is called______________?
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A. Absolute growth

B. Assimilation

C. Determinate growth

D. Indeterminate growth
3564. Among the cotton exporting countries the number of China is________________?
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A. 4<sup>th</sup>

B. 2nd

C. 3<sup>rd</sup>

D. 1<sup>st</sup>

3565. Mg in plants act as___________________?
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A. Protein activator

B. Enzyme activator

C. Starch activator

D. None of the above

3566. Gaseous loss of a substance from the soil or from fertilizer or manure is called_________________?
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A. Evaporation

B. Evapotranspiration

C. Volatilization

D. Transpiration

3567. Annual rye grass releases a chemical through its root that prevents________________?
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A. Crop seeds

B. weed seed

C. Both a and b

D. non of these

3568. The ratio of treatment variance to error variance is known as_________________?
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A. I-value

B. Critical difference

C. F-value

D. Correlation

3569. Ratio of crop yield to the amount of water utilized is called______________?
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A. Soil water use

B. Crop water use efficiency

C. Soil plant water relationship

D. Water intensity

3570. Tillage is field operation which help in cutting, loosening and inverting the soil for_________________?
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A. Seed bed preparation

B. Transplantation

C. Irrigation

D. Fertilization

3571. Root rot of cotton is a_________________?
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A. Fungal disease

B. Viral disease

C. Bacterial disease

3572. The control and preservation of natural resources For present and future use is_________________?
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A. Environment

B. Biodiversity

C. Substainability

D. Conservation
3573. The enzyme responsible for biological nitrogen fixation is________________?
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A. Lipase

B. Nitrogenase

C. Isomerase

D. Kinease

3574. The actual amount H2O present in the air is called_____________?
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A. Relative humidity

B. Absolute humidity

C. Both A and B

D. non of these

3575. Which one of the following is C4 plain_________________?
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A. Sugarcane

B. Make

C. All the above

D. Sorghum

3576. One rooting hormone occurring naturally in plant is ___________________?
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A. Naphthalene acetic acid

B. Indolebutyric

C. None of the above

D. Indolacetic acid

3577. Primary air polluted is________________?
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A. SO<sub>3</sub>

B. SO2

C. None

D. SO<sub>4</sub>

3578. Allelochemicals are used as growth regulators and natural pesticides to promote__________________?
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A. Sustainable agriculture

B. Improve agriculture

C. Both a and b
3579. A process in which most of the organisms are killed is known as_________________?
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A. Pasteurization

B. Heating

C. Neutralization

D. Sterilization
3580. Crop rotation means growing_________________?
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A. Growing green manures

B. Growing different crops

C. Same craps

D. Growing fodder crops

3581. Progeny of nucleus seed is called_________________?
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A. Breeder seed

B. Basic seed

C. Foundation seed

D. All the above

3582. The wearing away of the land surface by wind, water, ice or other geological agent is called__________________?
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A. fertility depletion

B. Seepage

C. Soil conservation

D. Erosion
3583. In wheat total crop N uptake per ton of grain is about__________________?
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A. 20-30 Kg

B. 70-80 Kg

C. 15-20 Kg

D. 50-60 Kg

3584. England cotton was imported from the time in__________________?
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A. 1530 AD

B. 1500 AD

C. 1430 AD

D. 1435 AD

3585. In cotton the recommended R x R distance is_________________?
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A. 90 cm

B. 45 cm

C. 75 cm
3586. Maize plant belong to_________?
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A. C3 plant

B. CAM

C. None of above

D. C4 plants
3587. Partially decomposed organic matter is termed as___________________?
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A. Farm yard manure

B. Composet

C. Humus

D. All the above

3588. The oxygen concentration in the air is________________?
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A. 45%

B. 21%

C. 16%

D. 30%

3589. The technical name of janter is_________________?
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A. S. mavretiana

B. Sesbania sesban

C. S. aphylla

D. S. oleaides

3590. Removal of branches for forage is________________?
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A. Lopping

B. Foraging

C. Litter

D. None of the above

3591. Hyderabad district area is in_________________?
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A. None of the above

B. Cholistan range area

C. Raygistan range area

D. Thai range area
3592. What is SAZDA_______________?
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A. None of the above

B. Sindhi Arid Zone Development Authority

C. Sindhi Agricultural Zonal Development Authority

D. non of these

3593. Use of linear measurements of plumule growth as a vigour test was first suggested by_______________?
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A. Woodstock (1976)

B. Germ (1949)

C. Maguire (1962)

D. Baskin (1972)

3594. If the quantity of organic matter is more than 50% is called________?
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A. Sandy soil

B. Clay soil

C. All of these

D. Peat soil
3595. Wheat plant belong to__________?
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A. C3 plant

B. C4 plants

C. None of above

D. CAM

3596. Seed leachate conductivity is significantly higher in seeds having_________________?
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A. Lower shoot weight

B. Higher root weight

C. None of the above

D. Higher shoot weight

3597. Abnormal seeding growth in rice is more closely related, with______________?
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A. IID grains

B. LD grains

C. Both a & b

D. None of the above

3598. Hot desert has mean annual temperature of___________________?
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A. 30C

B. None of the above

C. 50C

D. 40C

3599. Which area of Pakistan is best for agriculture________?
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A. Sindh

B. Punjab

C. Baluchistan

D. Kpk

3600. Plants uptake their nutrients from____________________?
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A. Air

B. Water

C. So

D. All the above