Field Crop Production: Wheat, Rice and Maize MCQs 2026
130 questions with detailed answers · 33 from past papers · 13 quiz batches available
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- Q1 medium
Rice blast disease is caused by
💡 Explanation:Rice blast is caused by Magnaporthe oryzae, also known in older literature as Pyricularia oryzae.
- Q2 medium
Leaf rust of wheat is commonly associated with the pathogen
💡 Explanation:Leaf rust or brown rust of wheat is caused by Puccinia triticina.
- Q3 medium
The botanical family of wheat, rice and maize is
💡 Explanation:Wheat, rice and maize are cereal grasses and belong to family Poaceae.
- Q4 medium
The common bread wheat grown in Pakistan is botanically known as
💡 Explanation:Bread wheat is Triticum aestivum; durum wheat is mainly used for pasta and semolina.
- Q5 medium
The inflorescence of wheat is called a
💡 Explanation:Wheat bears spikelets on a central rachis, forming a spike.
- Q6 medium
The nutrient most closely associated with tillering and vegetative growth in wheat is
💡 Explanation:Nitrogen promotes vegetative growth, tillering and leaf area development in cereals.
- Q7 medium
A very critical first irrigation stage in wheat is
💡 Explanation:Irrigation at crown root initiation supports root establishment and tiller formation.
- Q8 easy
In Pakistan, wheat is primarily grown as a
💡 Explanation:Wheat is sown in autumn-winter and harvested in spring, making it a Rabi crop.
- Q9 medium
A common seed rate for line-sown irrigated wheat is about
💡 Explanation:Many wheat recommendations for normal line sowing fall near 100 to 125 kg seed per hectare, depending on variety and seed size.
- Q10 medium
Loose smut of wheat is best managed at sowing by
💡 Explanation:Loose smut is internally seed-borne, so systemic seed treatment is an important control measure.
- Q11 medium
Terminal heat stress in wheat most directly reduces yield by shortening
💡 Explanation:High temperature near maturity shortens grain filling and lowers grain weight.
- Q12 medium
Phalaris minor in wheat fields is a
💡 Explanation:Phalaris minor is a serious grassy weed in wheat, especially in rice-wheat areas.
- Q13 easy
For safe storage, wheat grain moisture should generally be reduced to about
💡 Explanation:Wheat stored near 12 percent moisture is less prone to mould and insect problems.
- Q14 easy
The botanical name of cultivated Asian rice is
💡 Explanation:Oryza sativa is the major cultivated Asian rice species.
- Q15 medium
Transplanted lowland rice is best adapted to
💡 Explanation:Puddling and shallow flooding help establish transplanted rice and suppress many weeds.
- Q16 medium
Rice seedlings are commonly ready for transplanting at about
💡 Explanation:Healthy rice seedlings are usually transplanted when they are about 25 to 35 days old, depending on variety and season.
- Q17 medium
The main purpose of puddling in rice culture is to
💡 Explanation:Puddling breaks aggregates, reduces water loss and facilitates transplanting.
- Q18 medium
Rice is especially sensitive to water stress around
💡 Explanation:Water stress at panicle initiation and flowering can severely reduce spikelet fertility and yield.
- Q19 medium
Bacterial leaf blight of rice is caused by
💡 Explanation:Bacterial leaf blight of rice is caused by Xanthomonas oryzae pv. oryzae.
- Q20 medium
Brown planthopper damages rice mainly by
💡 Explanation:Brown planthopper is a sap-sucking pest that can cause hopper burn in rice fields.
- Q21 easy
Basmati rice is valued mainly for
💡 Explanation:Basmati types are prized for characteristic aroma, elongation and long slender grains.
- Q22 medium
Direct seeded rice requires particularly careful management of
💡 Explanation:Absence of standing transplanted seedlings makes weed competition a major challenge in direct seeded rice.
- Q23 medium
Zinc deficiency in rice often appears as
💡 Explanation:Zinc deficiency in rice commonly causes bronzing, stunting and poor tillering.
- Q24 medium
Alternate wetting and drying in rice is primarily used to
💡 Explanation:Alternate wetting and drying is a water-saving irrigation method for lowland rice.
- Q25 easy
The botanical name of maize is
💡 Explanation:Maize is botanically known as Zea mays.
- Q26 medium
Maize is physiologically classified as a
💡 Explanation:Maize uses the C4 photosynthetic pathway, which gives high efficiency under warm, bright conditions.
- Q27 easy
The male inflorescence of maize is the
💡 Explanation:The tassel at the top of the maize plant produces pollen.
- Q28 easy
The female inflorescence of maize develops as the
💡 Explanation:The maize ear or cob carries the female flowers and later the grains.
- Q29 medium
Pollination in maize is mainly
💡 Explanation:Maize is largely cross-pollinated, with pollen shed from tassels and carried by wind to silks.
- Q30 medium
The most critical moisture stress period in maize is around
💡 Explanation:Water stress near tasseling and silking reduces pollination, kernel set and yield.
- Q31 medium
A common plant spacing for hybrid maize is close to
💡 Explanation:Hybrid maize is commonly planted in rows near 75 cm apart with plant spacing around 20 to 25 cm, adjusted by region and hybrid.
- Q32 medium
Nitrogen fertilizer in maize is commonly applied in
💡 Explanation:Splitting nitrogen improves use efficiency and matches maize demand during rapid growth.
- Q33 medium
Fall armyworm in maize typically feeds in the
💡 Explanation:Fall armyworm larvae commonly damage maize whorls and may also attack ears.
- Q34 medium
Stalk rot in maize is often favoured by
💡 Explanation:Stress, poor drainage and weak stalks increase susceptibility to stalk rots.
- Q35 medium
Appearance of the black layer in maize grain indicates
💡 Explanation:The black layer at the kernel base is a standard indicator of physiological maturity in maize.
- Q36 easy
Maize grain for safe storage is usually dried to about
💡 Explanation:Drying maize grain near 12 to 13 percent moisture reduces fungal and storage insect damage.
- Q37 easy
Line sowing with a seed drill in cereals mainly ensures
💡 Explanation:Seed drills help place seed at proper depth and spacing for uniform emergence.
- Q38 medium
Zero tillage wheat after rice is promoted because it can
💡 Explanation:Zero tillage enables timely wheat sowing after rice while conserving moisture and reducing tillage cost.
- Q39 medium
A common constraint in the rice-wheat system is
💡 Explanation:Late rice harvest often delays wheat sowing, reducing wheat yield potential.
- Q40 medium
Balanced use of NPK in cereal production helps to
💡 Explanation:Balanced fertilization supports crop growth, lodging resistance and grain formation better than nitrogen-only use.
- Q41 medium
Lodging in wheat is commonly promoted by excessive
💡 Explanation:Excess nitrogen and irrigation can produce weak, lush growth that lodges easily.
- Q42 medium
Deep placement of urea briquettes in transplanted rice helps reduce
💡 Explanation:Deep placement keeps nitrogen in the reduced soil zone and lowers volatilization and runoff losses.
- Q43 medium
Hybrid maize seed is preferred mainly because of
💡 Explanation:Hybrids exploit heterosis, often giving higher and more uniform yield under good management.
- Q44 medium
Seed treatment in wheat is mainly used to manage
💡 Explanation:Treating wheat seed helps control diseases carried on or within seed and some early soil-borne infections.
- Q45 medium
Incorporation of rice straw before wheat can temporarily immobilize
💡 Explanation:High-carbon residues like rice straw can temporarily immobilize soil nitrogen during decomposition.
- Q46 medium
Vernalization in wheat refers to the effect of
💡 Explanation:Vernalization is the promotion of flowering by exposure to low temperature in responsive wheat types.
- Q47 medium
The flag leaf of wheat is important because it contributes greatly to
💡 Explanation:The flag leaf is a major source of assimilates during grain filling in wheat.
- Q48 medium
Transplanting younger, healthy rice seedlings generally helps promote
💡 Explanation:Younger vigorous seedlings often recover faster and tiller better after transplanting.
- Q49 easy
The silk of maize primarily functions in
💡 Explanation:Each maize silk is connected to an ovule and receives pollen for fertilization.
- Q50 medium
Proper crop rotation in wheat, rice and maize systems helps to
💡 Explanation:Rotations diversify the system, help manage pests and weeds, and support soil health.
- Q51 Past Paper · PPSC/FPSC/NTS easy
Maize in Pakistan is used for
💡 Explanation:Maize supports poultry feed and human food.
- Q52 Past Paper · PPSC/FPSC/NTS easy
The leading staple food crop of Pakistan is
💡 Explanation:Wheat is Pakistan's principal food grain for caloric supply.
- Q53 Past Paper · PPSC/FPSC/NTS easy
Wheat in Pakistan is sown mainly in
💡 Explanation:Wheat is a winter (Rabi) cereal harvested in spring.
- Q54 Past Paper · PPSC/FPSC/NTS medium
Recommended wheat sowing in many irrigated plains is often around
💡 Explanation:Timely November sowing helps escape terminal heat.
- Q55 easy
A widely grown bread wheat type in Pakistan is
💡 Explanation:Common wheat (T. aestivum) dominates Pakistani production.
- Q56 Past Paper · PPSC/FPSC/NTS medium
Rust diseases of wheat include
💡 Explanation:Rusts are major foliar fungal threats to wheat.
- Q57 Past Paper · PPSC/FPSC/NTS medium
Late-sown wheat in Pakistan often suffers from
💡 Explanation:Delayed sowing pushes grain fill into hot weather.
- Q58 Past Paper · PPSC/FPSC/NTS easy
Rice is primarily a
💡 Explanation:Rice is grown in the warm season with irrigation.
- Q59 Past Paper · PPSC/FPSC/NTS easy
Basmati rice is especially associated with
💡 Explanation:Pakistan is a major basmati exporter.
- Q60 easy
IRRI-type coarse rice in Pakistan is often called
💡 Explanation:Coarse/IRRI rices supply domestic calories and some export.
- Q61 Past Paper · PPSC/FPSC/NTS easy
Puddled transplanted rice culture involves
💡 Explanation:Traditional system uses nurseries and puddled fields.
- Q62 Past Paper · PPSC/FPSC/NTS easy
A major rice-producing province of Pakistan is
💡 Explanation:Punjab and Sindh dominate rice area and output.
- Q63 medium
Bacterial leaf blight and blast are important diseases of
💡 Explanation:BLB and blast reduce rice yields in humid conditions.
- Q64 Past Paper · PPSC/FPSC/NTS easy
Cotton is Pakistan's major
💡 Explanation:Cotton underpins the textile value chain.
- Q65 Past Paper · PPSC/FPSC/NTS medium
Upland cotton grown widely in Pakistan is
💡 Explanation:G. hirsutum (American/upland) dominates acreage.
- Q66 Past Paper · PPSC/FPSC/NTS easy
Cotton is mainly a
💡 Explanation:Sown in spring/early summer and picked in autumn.
- Q67 Past Paper · PPSC/FPSC/NTS easy
Bt cotton was introduced in Pakistan to help control
💡 Explanation:Cry toxins target chewing bollworm pests.
- Q68 Past Paper · PPSC/FPSC/NTS medium
Cotton leaf curl disease (CLCuD) is caused by
💡 Explanation:CLCuD has been a devastating viral constraint.
- Q69 Past Paper · PPSC/FPSC/NTS medium
Pink bollworm is a serious pest of
💡 Explanation:Pectinophora gossypiella damages seeds/lint inside bolls.
- Q70 easy
Seed cotton yield refers to
💡 Explanation:Seed cotton is the harvested kapas before ginning.
- Q71 easy
Ginning separates
💡 Explanation:Ginneries produce lint bales and cottonseed.
- Q72 Past Paper · PPSC/FPSC/NTS easy
Sugarcane is a
💡 Explanation:Cane supplies sugar mills over a long field duration.
- Q73 Past Paper · PPSC/FPSC/NTS easy
Sugarcane planting in Pakistan commonly uses
💡 Explanation:Vegetative setts establish the crop.
- Q74 Past Paper · PPSC/FPSC/NTS easy
Ratoon cane is
💡 Explanation:Ratooning saves replanting cost for one or more years.
- Q75 easy
A major sugarcane province is
💡 Explanation:Irrigated plains dominate cane production.
- Q76 medium
Red rot is an important disease of
💡 Explanation:Colletotrichum falcatum causes red rot of cane.
- Q77 medium
Hybrid maize adoption has increased mainly for
💡 Explanation:Hybrids respond well to fertility and water.
- Q78 medium
Spring and autumn maize crops are grown in
💡 Explanation:Multiple maize seasons exist in Pakistan.
- Q79 easy
Sorghum and millet are important as
💡 Explanation:Coarse cereals suit barani and dry zones.
- Q80 easy
Barley in Pakistan is mainly a
💡 Explanation:Barley fits cooler season niches.
- Q81 Past Paper · PPSC/FPSC/NTS easy
Chickpea (gram) is a major
💡 Explanation:Gram is important for protein and rainfed systems.
- Q82 Past Paper · PPSC/FPSC/NTS medium
Chickpea is often grown in
💡 Explanation:Thal and similar zones are classic gram areas.
- Q83 easy
Lentil (masoor) is primarily a
💡 Explanation:Lentil contributes to winter pulse production.
- Q84 easy
Mungbean is mainly cultivated as a
💡 Explanation:Mung is a warm-season legume.
- Q85 easy
Mash (urdbean) is a
💡 Explanation:Vigna mungo is grown in summer.
- Q86 medium
Groundnut (peanut) is important in
💡 Explanation:Potohar and similar tracts grow groundnut.
- Q87 Past Paper · PPSC/FPSC/NTS easy
Rapeseed-mustard are mainly
💡 Explanation:Brassica oilseeds supply edible oil.
- Q88 easy
Sunflower is grown as
💡 Explanation:Sunflower contributes to domestic edible oil.
- Q89 medium
Sesame (til) is
💡 Explanation:Sesame suits relatively dry conditions.
- Q90 medium
Soybean cultivation in Pakistan remains
💡 Explanation:Soybean is minor but of interest for oil/protein.
- Q91 easy
Tobacco is grown as
💡 Explanation:Flue-cured and other types support industry.
- Q92 Past Paper · PPSC/FPSC/NTS easy
Potato in Pakistan is a major
💡 Explanation:Potato is key for food and processing.
- Q93 medium
Autumn, spring and summer potato crops reflect
💡 Explanation:Pakistan has multiple potato seasons.
- Q94 easy
Onion and tomato are important for
💡 Explanation:Vegetable supply shocks hit consumers quickly.
- Q95 Past Paper · PPSC/FPSC/NTS easy
Fodder crops such as berseem are crucial because
💡 Explanation:Berseem is a premier Rabi fodder legume.
- Q96 Past Paper · PPSC/FPSC/NTS easy
Berseem is typically a
💡 Explanation:Trifolium alexandrinum supports dairy systems.
- Q97 easy
Sorghum-sudan and maize fodders supply
💡 Explanation:Summer fodders bridge feed gaps.
- Q98 medium
Guar is grown as
💡 Explanation:Guar suits arid/semi-arid zones.
- Q99 easy
Jute and similar fiber crops are
💡 Explanation:Cotton is the fiber mainstay.
- Q100 medium
Line sowing of wheat compared with broadcasting generally
💡 Explanation:Drilling enables better depth and spacing.
- Q101 Past Paper · PPSC/FPSC/NTS medium
Zero-till wheat after rice helps
💡 Explanation:ZT is central to rice-wheat intensification.
- Q102 medium
Cotton sowing methods include
💡 Explanation:Bed-furrow cotton is increasingly promoted.
- Q103 medium
Delinting of cotton seed improves
💡 Explanation:Acid/mechanical delinting aids precision planting.
- Q104 hard
Topping in tobacco/cotton contexts refers to
💡 Explanation:Topping influences quality/yield components.
- Q105 medium
Cane crushing season timing depends on
💡 Explanation:Recovery % guides harvest scheduling.
- Q106 medium
Trash burning in sugarcane fields is discouraged because it
💡 Explanation:Green cane harvesting/trash blanketing is preferable.
- Q107 Past Paper · PPSC/FPSC/NTS medium
Wheat seed rate recommendations commonly fall near
💡 Explanation:Exact rates vary with seed size and method.
- Q108 easy
Rice nursery area is a fraction of
💡 Explanation:Nurseries supply seedlings for transplanting.
- Q109 medium
Hybrid rice can offer
💡 Explanation:Hybrid seed must be purchased each season.
- Q110 hard
Desi cotton (G. arboreum) compared with hirsutum generally
💡 Explanation:American cotton dominates commercial area.
- Q111 easy
Cotton picking in Pakistan is largely
💡 Explanation:Multiple hand pickings are common.
- Q112 easy
Wheat threshing is commonly done by
💡 Explanation:Mechanical threshing dominates.
- Q113 easy
Combine harvesting of wheat
💡 Explanation:Combines speed harvest but need residue management.
- Q114 medium
Parboiling is a processing step associated with
💡 Explanation:Parboiled rice has different milling/cooking traits.
- Q115 Past Paper · PPSC/FPSC/NTS medium
Recovery percentage in sugar industry means
💡 Explanation:Higher recovery improves mill economics.
- Q116 Past Paper · PPSC/FPSC/NTS easy
Cottonseed is valued for
💡 Explanation:Cottonseed is a major oilseed by-product.
- Q117 easy
Wheat straw is widely used as
💡 Explanation:Bhoosa is critical in mixed farming.
- Q118 easy
Rice husk and bran are
💡 Explanation:By-product utilization adds value.
- Q119 medium
Bagasse from sugarcane is used for
💡 Explanation:Bagasse is the fibrous residue after crushing.
- Q120 easy
Molasses is a by-product of
💡 Explanation:Molasses feeds industry and livestock.
- Q121 medium
Gram wilt and blight are constraints of
💡 Explanation:Fungal diseases limit gram in rainfed systems.
- Q122 medium
Pod borer complexes affect
💡 Explanation:Helicoverpa and related borers are polyphagous.
- Q123 hard
Aflatoxin risk is especially discussed for
💡 Explanation:Mycotoxin management matters for food/feed safety.
- Q124 Past Paper · PPSC/FPSC/NTS medium
Oilseed import dependence of Pakistan reflects
💡 Explanation:Brassicas, sunflower etc. still leave a large gap.
- Q125 hard
Cluster bean (guar) gum has
💡 Explanation:Guar gum is an industrial export product.
- Q126 hard
Isabgol / psyllium where grown is valued as
💡 Explanation:Specialty crops occupy niches.
- Q127 Past Paper · PPSC/FPSC/NTS easy
Crop zoning for field crops should match
💡 Explanation:Right crop in right place raises productivity.
- Q128 medium
Intercropping cotton with legumes can
💡 Explanation:Careful design avoids excessive competition.
- Q129 Past Paper · PPSC/FPSC/NTS medium
Wheat-legume rotations help
💡 Explanation:Gram/lentil after cereals diversify systems.
- Q130 Past Paper · PPSC/FPSC/NTS easy
The four major field crops often emphasized in Pakistan exams are
💡 Explanation:These four dominate area, food security and industry linkages.