WSI MULTIPLE CHOICE CERTIFICATION
PAPER 2026 FULL SOLUTIONS GRADED A+
⩥ Which nutrient is most associated with protein formation?A.
NitrogenB. PotassiumC. PhosphorusD. Calcium. Answer: A. Nitrogen
⩥ Which soil factor most influences nutrient holding capacity?A.
TemperatureB. Cation Exchange CapacityC. SlopeD. Drainage. Answer:
B. Cation Exchange Capacity
⩥ Which crop stage shows peak nitrogen demand in corn?A.
EmergenceB. V6 to tasselingC. Grain fillD. Maturity. Answer: B. V6 to
tasseling
⩥ Which irrigation scheduling tool estimates crop water use?A. Soil
texture chartB. Evapotranspiration dataC. Fertilizer analysisD. Soil
color. Answer: B. Evapotranspiration data
⩥ Which pest threshold determines when control is economically
justified?A. Economic injury levelB. Economic thresholdC. Damage
thresholdD. Action level. Answer: B. Economic threshold
,⩥ Which nutrient deficiency commonly causes poor nodulation in
legumes?A. MolybdenumB. PotassiumC. SulfurD. Chlorine. Answer: A.
Molybdenum
⩥ Which soil condition slows microbial activity?A. Warm moist soilB.
Cold dry soilC. High organic matterD. Adequate aeration. Answer: B.
Cold dry soil
⩥ Which pesticide drift reduction practice is most effective?A.
Increasing boom heightB. Using larger dropletsC. Spraying during high
windsD. Using fine spray tips. Answer: B. Using larger droplets
⩥ Which soil test level indicates maximum economic yield potential?A.
LowB. Very lowC. OptimumD. Excessive. Answer: C. Optimum
⩥ Which factor increases phosphorus fixation in soil?A. Neutral pHB.
High clay and iron contentC. Sandy soilD. High organic matter. Answer:
B. High clay and iron content
⩥ Which nutrient is essential for chlorophyll formation?A.
MagnesiumB. PotassiumC. CalciumD. Sulfur. Answer: A. Magnesium
⩥ Which cropping practice helps break pest cycles?A. MonocultureB.
Crop rotationC. Continuous cornD. Reduced planting density. Answer:
B. Crop rotation
, ⩥ Which soil sampling timing provides most consistent results?A.
Random yearly samplingB. Same time each sampling cycleC. During
manure spreadingD. After heavy rainfall. Answer: B. Same time each
sampling cycle
⩥ Which nutrient is a primary component of ATP and energy transfer in
plants?A. NitrogenB. PhosphorusC. PotassiumD. Calcium. Answer: B.
Phosphorus
⩥ Which soil factor most affects herbicide persistence?A. Soil colorB.
Organic matterC. Soil slopeD. Wind speed. Answer: B. Organic matter
⩥ Which nutrient deficiency causes leaf margin scorching?A.
PotassiumB. NitrogenC. IronD. Sulfur. Answer: A. Potassium
⩥ Which nitrogen source requires injection to reduce loss?A. UreaB.
Ammonium sulfateC. Anhydrous ammoniaD. Calcium nitrate. Answer:
C. Anhydrous ammonia
⩥ Which conservation practice reduces surface runoff velocity?A.
SubsoilingB. TerracesC. Moldboard plowingD. Residue removal.
Answer: B. Terraces
PAPER 2026 FULL SOLUTIONS GRADED A+
⩥ Which nutrient is most associated with protein formation?A.
NitrogenB. PotassiumC. PhosphorusD. Calcium. Answer: A. Nitrogen
⩥ Which soil factor most influences nutrient holding capacity?A.
TemperatureB. Cation Exchange CapacityC. SlopeD. Drainage. Answer:
B. Cation Exchange Capacity
⩥ Which crop stage shows peak nitrogen demand in corn?A.
EmergenceB. V6 to tasselingC. Grain fillD. Maturity. Answer: B. V6 to
tasseling
⩥ Which irrigation scheduling tool estimates crop water use?A. Soil
texture chartB. Evapotranspiration dataC. Fertilizer analysisD. Soil
color. Answer: B. Evapotranspiration data
⩥ Which pest threshold determines when control is economically
justified?A. Economic injury levelB. Economic thresholdC. Damage
thresholdD. Action level. Answer: B. Economic threshold
,⩥ Which nutrient deficiency commonly causes poor nodulation in
legumes?A. MolybdenumB. PotassiumC. SulfurD. Chlorine. Answer: A.
Molybdenum
⩥ Which soil condition slows microbial activity?A. Warm moist soilB.
Cold dry soilC. High organic matterD. Adequate aeration. Answer: B.
Cold dry soil
⩥ Which pesticide drift reduction practice is most effective?A.
Increasing boom heightB. Using larger dropletsC. Spraying during high
windsD. Using fine spray tips. Answer: B. Using larger droplets
⩥ Which soil test level indicates maximum economic yield potential?A.
LowB. Very lowC. OptimumD. Excessive. Answer: C. Optimum
⩥ Which factor increases phosphorus fixation in soil?A. Neutral pHB.
High clay and iron contentC. Sandy soilD. High organic matter. Answer:
B. High clay and iron content
⩥ Which nutrient is essential for chlorophyll formation?A.
MagnesiumB. PotassiumC. CalciumD. Sulfur. Answer: A. Magnesium
⩥ Which cropping practice helps break pest cycles?A. MonocultureB.
Crop rotationC. Continuous cornD. Reduced planting density. Answer:
B. Crop rotation
, ⩥ Which soil sampling timing provides most consistent results?A.
Random yearly samplingB. Same time each sampling cycleC. During
manure spreadingD. After heavy rainfall. Answer: B. Same time each
sampling cycle
⩥ Which nutrient is a primary component of ATP and energy transfer in
plants?A. NitrogenB. PhosphorusC. PotassiumD. Calcium. Answer: B.
Phosphorus
⩥ Which soil factor most affects herbicide persistence?A. Soil colorB.
Organic matterC. Soil slopeD. Wind speed. Answer: B. Organic matter
⩥ Which nutrient deficiency causes leaf margin scorching?A.
PotassiumB. NitrogenC. IronD. Sulfur. Answer: A. Potassium
⩥ Which nitrogen source requires injection to reduce loss?A. UreaB.
Ammonium sulfateC. Anhydrous ammoniaD. Calcium nitrate. Answer:
C. Anhydrous ammonia
⩥ Which conservation practice reduces surface runoff velocity?A.
SubsoilingB. TerracesC. Moldboard plowingD. Residue removal.
Answer: B. Terraces
