3301. The net reaction of photosynthesis is_____________________?
comments icon0

A. None of the above

B. CaCO3 + 2HCl CaCl2 H2O+CO3

C. CO2 + H2O light O2 + (CH3O)

D. ((CH2O) + O2 CO2 + H2O)

3302. Acid soil contain pH____________________?
comments icon0

A. 8.5

B. >7

C. >7.0

D.
3303. Cyclic salts are mostly of ______________________?
comments icon0

A. None of the above

B. Cl

C. SO4

D. HCO<sub>3</sub>

3304. International atomic weight of potassium is_________________?
comments icon0

A. 41

B. 40

C. 38

D. 39.0
3305. Mechanisms of material uptake by plants is by____________________?
comments icon0

A. Diffusion

B. Mass flow

C. Root interception

D. Osmosis

3306. Shrinking and swelling is property of__________________?
comments icon0
A. Smecitie

B. Water

C. Silk

D. Clay

3307. The particlesw density of a mineral soil is about____________________?
comments icon0

A. 2550 Kg m-3

B. 2650 Kg m-3

C. 2750 Kg m-3

D. None of the above

3308. hydrosphere refers to______________________?
comments icon0
A. Zone of water

B. Zone of earth crust

C. Zone of atmosphere

D. Zone of air

3309. Physical condition of soil for plant growth is called___________________?
comments icon0

A. All the above

B. Granulation

C. Tilth

D. Tillage

3310. The salinity can be reduced by the application of___________________?
comments icon0

A. All the above

B. Urea

C. Lime

D. Sulphuric acid

3311. Buffer solution is a solution which resist change in __________________ ?
comments icon0

A. SAP

B. pH

C. EC

D. RSC

3312. Chromium (Cr) is a____________________?
comments icon0

A. Secondary element

B. Heavy metal

C. Free element

D. Macro element

3313. Kaolinite can be identified by______________________?
comments icon0

A. Boiling

B. Breaking

C. X-ray diffraction

D. Spectrophotometer

3314. Examples of micro biota are____________________?
comments icon0

A. Protozoa

B. Virus

C. Both a & b

D. None of the above

3315. Permanente wilting point of clayey soils is not less than____________________?
comments icon0
A. 10%

B. 20%

C. 15%

D. 5%

3316. The problem of soil crosion Thal and Cholistan is predominantly due to___________________?
comments icon0

A. Air

B. Wind

C. Water

D. All the above

3317. Who characterized soil formation as set of 4 process______________________?
comments icon0
A. Simonson

B. Jinney

C. Ziking

D. Newton

3318. Plutonic rocks are also called____________________?
comments icon0

A. Extrusive igneous rock

B. Sedimentary

C. Intrusive igneous

D. Metamorphic

3319. Algal photosynthesis increases pH of water and releases___________________?
comments icon0

A. O2

B. All the above

C. CO2

D. SO3

3320. Identify the fertilizer (s) containing potassium____________________?
comments icon0
A. All the above

B. MOP

C. Chilean salt peter

D. SOP

3321. Color off basic matic rock is_____________________?
comments icon0

A. Light green

B. Blue

C. Dark colored

D. Yellow

3322. The formula used for calculating RSC is _____________________?
comments icon0

A. None of the above

B. RSC=(CO32 + HCO2) ( Ca2 + Mg2)

C. non of these

D. RSC=(CO32 + HCO2) (Na + K + Ca2 + Mg2)

3323. Which instrument is used for determining soil texture___________________?
comments icon0

A. All the above

B. Thermometer

C. Hydrometer

D. Lysimeter

3324. The safe limit of No2 in drinking water is_____________________?
comments icon0

A. None of the above

B. 10 mg L-1

C. 20 mg L-1

D. 15 mg L-1

3325. Attraction between similar particles is called____________________?
comments icon0

A. Adhesion

B. Cohesion

C. All the above

D. Vander wall

3326. Nitrification is the microbial conversion of____________________?
comments icon0

A. NO3 nitrogen to NH4 + in soil

B. None of the above

C. NO2 to NO3 nitrogen in soil

D. NH nitrogen the NO3 nitrogen in soil
3327. Which mineral contain phosphorus__________________?
comments icon0

A. None of the above

B. Metamorphic

C. Igneous

D. Apatite
3328. Botanical name of American cotton is_________________?
comments icon0
A. G. hirsutum

B. G. barb dense

C. Non of these

D. G. arborium

3329. In China, cotton was cultivated as a crop in._______________?
comments icon0

A. 7<sup>th</sup> century AD

B. 5<sup>th</sup> century AD

C. 10<sup>th</sup> century AD

D. 4th century AD
3330. The branch of Science which deals cultivation of land is called________________?
comments icon0
A. Agriculture

B. Geology

C. Petrology

D. Horticulture

3331. Cotton ginning machine was invented by_______________?
comments icon0
A. Withey

B. William Black

C. Thomas Hough ten

D. Thomas Wilson

3332. Gassypium arborium is__________________?
comments icon0
A. Diploid

B. Haploid

C. Triploid

D. Tetraploid

3333. Gassypium herbaceum was originated in______________?
comments icon0
A. South Mexico and Central America

B. Kenya and South Africa

C. Ethipia and South Africa

D. Indonesia and Central America

3334. Gassypium hirsutum was developed from a cross between________________?
comments icon0

A. G.arbarieum and G. rainmundii

B. G.arbarieum and G.herbaceum

C. G.arbarieum and G.thurberii

D. G.arbarieum and G.barbadense

3335. A foreign variety that is directly recommended for commercial cultivation is called_________________?
comments icon0

A. Hybrid variety

B. Blended variety

C. Exotic variety

D. Pure line variety

3336. Azolla which fixes nitrogen in rice field is__________________?
comments icon0

A. Bacteria

B. Ferm

C. None of the above

D. Fungi

3337. Geographical area of Pakistan in million hectare is_______________?
comments icon0

A. 60

B. 95

C. 80

D. none of the above

3338. A crop grown on residual moisture after harvesting rice is called__________________?
comments icon0

A. Barani crop

B. Ratoon crop

C. Sure crop

D. Dubari crop

3339. In 1991-92 the record production of cotton in Pakistan was_______________?
comments icon0

A. 1100,000 bales

B. 12800,000 bales

C. 1200,000 bales

D. 1000,000 bales

3340. The vegetation found on high altitude mountain is__________________?
comments icon0

A. None of the above

B. Alpine vegetation

C. Tundra vegetation

D. Conferous vegetation

3341. Who described. the use of letrazolium for assessing, seed quality and the basis of topographical patterns___________________?
comments icon0

A. Kotowski (1926)

B. Moore (1973)

C. Burries etc (1969)

D. Maguare (1962)

3342. The significance of difference among several means is tested with the level of_________________?
comments icon0

A. Z-test

B. t-test

C. X-test

D. F-test
3343. The organisms which do not prepare their own food and depend on the dead organisms are called_____________________?
comments icon0

A. Obligatory parasites

B. Bacteria

C. Parasites

D. Saprophytes
3344. There is________________?
comments icon0

A. 47560 Sq ft in an acre

B. 40560 Sq ft in an acre

C. 46560 Sq ft in an acre

D. 43560 Sq ft in an acre
3345. Electrolytes leakage is defendant on_________________?
comments icon0

A. Condition of cell membrane

B. Cracking of seed test

C. Both a & b

D. None of the above

3346. The negative logarithm of the hydrogen ion concentration, a measure of the acidity of a solution is called_______________?
comments icon0
A. pH

B. Saliruiy

C. Cl

D. EC

3347. Low soil pH is the indication of_______________?
comments icon0

A. Moderate Mg and Ca

B. Low N and Ca

C. High N and S

D. High Mg and Ca
3348. In fanning system cultivation of two or more crops is known as_______________?
comments icon0

A. Strip cropping

B. Multiple cropping

C. All the above

D. Sequential cropping

3349. There has been emphasis on the conservation of wild relatives of cultivated plants because wild plants________________?
comments icon0
A. Carrying many useful genes which are lost in cultivated plants

B. Needed to understand the origin of cu;cultivated plants

C. Grow better then cultivated plants

D. Serve, as valuable fodder plants

3350. First ginning machine was invented in_______________?
comments icon0
A. 1793 AD

B. 1650 AD

C. 1893 AD

D. 1880 AD