WSI MULTIPLE CHOICE ACTUAL
EXAMINATION 2026 COMPREHENSIVE
QUESTIONS GRADED A+
⩥ A WI farmer applies 4,000 gal/ac dairy manure (8 lb N/1,000 gal).
How much total N is applied?A. 24 lbB. 28 lbC. 32 lbD. 36 lb. Answer:
C. 32 lb
⩥ Which soil texture has the HIGHEST nitrate leaching potential?A.
ClayB. Silty clay loamC. LoamD. Sand. Answer: D. Sand
⩥ A Bray-P1 of 8 ppm falls into which category?A. Very lowB. LowC.
OptimumD. High. Answer: B. Low
⩥ The most accurate Wisconsin method for determining manure
application rates is:A. Book valuesB. Manure analysisC. Neighbor
recommendationsD. Visual estimates. Answer: B. Manure analysis
⩥ When is sulfur deficiency MOST likely in Wisconsin?A. Early spring
on sandy soilsB. Mid-summer on clay soilsC. Fall after harvestD.
Winter. Answer: A. Early spring on sandy soils
⩥ A soil pH of 8.1 is most likely to reduce availability of:A.
PhosphorusB. IronC. NitrogenD. Potassium. Answer: B. Iron
,⩥ Alfalfa following alfalfa requires special consideration due to:A.
Nitrogen deficiencyB. AutotoxicityC. Potassium toxicityD. Insect
pressure. Answer: B. Autotoxicity
⩥ Which nutrient is MOST often lost by erosion in Wisconsin?A.
NitrogenB. PhosphorusC. SulfurD. Magnesium. Answer: B. Phosphorus
⩥ The standard WI soil test sampling depth for no-till fields is:A. 6-7
inchesB. 0-3 inchesC. 7-12 inchesD. 12-18 inches. Answer: A. 6-7
inches
⩥ How many lb of N are credited from well-managed 3-year alfalfa?A.
50 lbB. 75 lbC. 100-150 lbD. 200 lb. Answer: C. 100-150 lb
⩥ Which manure application method greatly reduces ammonia
volatilization?A. Surface broadcastB. InjectedC. Broadcast before
rainfallD. Winter spreading. Answer: B. Injected
⩥ Sulfur deficiency symptoms show up FIRST on:A. Older leavesB.
Younger leavesC. RootsD. Stems. Answer: B. Younger leaves
⩥ The Wisconsin P Index field limit is:A. 4B. 6C. 8D. 10. Answer: B. 6
,⩥ A field has 2% OM. What is true about N mineralization?A. Very
lowB. ModerateC. Extremely highD. None. Answer: B. Moderate
⩥ Which form of N is most prone to volatilization?A. NitrateB. UreaC.
Ammonium sulfateD. Organic nitrogen. Answer: B. Urea
⩥ A Central Sands field (92% sand, 1.2% OM) is planted to potatoes.
Best N strategy?A. Single heavy spring applicationB. Split N with
multiple fertigationsC. Fall N applicationD. Surface urea only. Answer:
B. Split N with multiple fertigations
⩥ A farmer wants to reduce the Wisconsin P Index. Which practice most
reliably lowers PI?A. Increasing manure applicationB. Fall tillage
onlyC. Adding contour buffer stripsD. Increasing phosphorus fertilizer.
Answer: C. Adding contour buffer strips
⩥ A soil test shows pH 5.4 on a silt loam in southern WI. Which crop is
most negatively affected?A. CornB. AlfalfaC. SoybeansD. Oats.
Answer: B. Alfalfa
⩥ A grower rotates corn after soybeans. Typical N credit for soybeans in
Wisconsin?A. 20 lb N/acB. 30 lb N/acC. 40 lb N/acD. 60 lb N/ac.
Answer: C. 40 lb N/ac
, ⩥ A dairy farm applies manure in October on silt loam soils. Which risk
is greatest?A. VolatilizationB. Soil compactionC. N leachingD.
Potassium deficiency. Answer: C. N leaching
⩥ What form of nitrogen is most prone to leaching on sandy soils?A.
AmmoniumB. NitrateC. Organic ND. Urea. Answer: B. Nitrate
⩥ A field has 7.2 pH, high P, high K. Alfalfa shows yellowing between
veins on upper leaves. Likely deficiency?A. MagnesiumB. IronC.
NitrogenD. Sulfur. Answer: B. Iron deficiency
⩥ Manure applied to frozen ground is restricted primarily under which
WI rule?A. ATCP 50B. ATCP 29C. NRCS 590D. EPA 503. Answer: A.
ATCP 50
⩥ A corn field shows purple leaves in early spring. Most likely cause?A.
Nitrogen deficiencyB. Phosphorus deficiency from cold soilsC.
Potassium deficiencyD. Sulfur deficiency. Answer: B. Phosphorus
deficiency from cold soils
⩥ What is the recommended sampling depth for routine soil tests in
Wisconsin?A. 6 inchesB. 3 inchesC. 12 inchesD. 18 inches. Answer: A.
6 inches
EXAMINATION 2026 COMPREHENSIVE
QUESTIONS GRADED A+
⩥ A WI farmer applies 4,000 gal/ac dairy manure (8 lb N/1,000 gal).
How much total N is applied?A. 24 lbB. 28 lbC. 32 lbD. 36 lb. Answer:
C. 32 lb
⩥ Which soil texture has the HIGHEST nitrate leaching potential?A.
ClayB. Silty clay loamC. LoamD. Sand. Answer: D. Sand
⩥ A Bray-P1 of 8 ppm falls into which category?A. Very lowB. LowC.
OptimumD. High. Answer: B. Low
⩥ The most accurate Wisconsin method for determining manure
application rates is:A. Book valuesB. Manure analysisC. Neighbor
recommendationsD. Visual estimates. Answer: B. Manure analysis
⩥ When is sulfur deficiency MOST likely in Wisconsin?A. Early spring
on sandy soilsB. Mid-summer on clay soilsC. Fall after harvestD.
Winter. Answer: A. Early spring on sandy soils
⩥ A soil pH of 8.1 is most likely to reduce availability of:A.
PhosphorusB. IronC. NitrogenD. Potassium. Answer: B. Iron
,⩥ Alfalfa following alfalfa requires special consideration due to:A.
Nitrogen deficiencyB. AutotoxicityC. Potassium toxicityD. Insect
pressure. Answer: B. Autotoxicity
⩥ Which nutrient is MOST often lost by erosion in Wisconsin?A.
NitrogenB. PhosphorusC. SulfurD. Magnesium. Answer: B. Phosphorus
⩥ The standard WI soil test sampling depth for no-till fields is:A. 6-7
inchesB. 0-3 inchesC. 7-12 inchesD. 12-18 inches. Answer: A. 6-7
inches
⩥ How many lb of N are credited from well-managed 3-year alfalfa?A.
50 lbB. 75 lbC. 100-150 lbD. 200 lb. Answer: C. 100-150 lb
⩥ Which manure application method greatly reduces ammonia
volatilization?A. Surface broadcastB. InjectedC. Broadcast before
rainfallD. Winter spreading. Answer: B. Injected
⩥ Sulfur deficiency symptoms show up FIRST on:A. Older leavesB.
Younger leavesC. RootsD. Stems. Answer: B. Younger leaves
⩥ The Wisconsin P Index field limit is:A. 4B. 6C. 8D. 10. Answer: B. 6
,⩥ A field has 2% OM. What is true about N mineralization?A. Very
lowB. ModerateC. Extremely highD. None. Answer: B. Moderate
⩥ Which form of N is most prone to volatilization?A. NitrateB. UreaC.
Ammonium sulfateD. Organic nitrogen. Answer: B. Urea
⩥ A Central Sands field (92% sand, 1.2% OM) is planted to potatoes.
Best N strategy?A. Single heavy spring applicationB. Split N with
multiple fertigationsC. Fall N applicationD. Surface urea only. Answer:
B. Split N with multiple fertigations
⩥ A farmer wants to reduce the Wisconsin P Index. Which practice most
reliably lowers PI?A. Increasing manure applicationB. Fall tillage
onlyC. Adding contour buffer stripsD. Increasing phosphorus fertilizer.
Answer: C. Adding contour buffer strips
⩥ A soil test shows pH 5.4 on a silt loam in southern WI. Which crop is
most negatively affected?A. CornB. AlfalfaC. SoybeansD. Oats.
Answer: B. Alfalfa
⩥ A grower rotates corn after soybeans. Typical N credit for soybeans in
Wisconsin?A. 20 lb N/acB. 30 lb N/acC. 40 lb N/acD. 60 lb N/ac.
Answer: C. 40 lb N/ac
, ⩥ A dairy farm applies manure in October on silt loam soils. Which risk
is greatest?A. VolatilizationB. Soil compactionC. N leachingD.
Potassium deficiency. Answer: C. N leaching
⩥ What form of nitrogen is most prone to leaching on sandy soils?A.
AmmoniumB. NitrateC. Organic ND. Urea. Answer: B. Nitrate
⩥ A field has 7.2 pH, high P, high K. Alfalfa shows yellowing between
veins on upper leaves. Likely deficiency?A. MagnesiumB. IronC.
NitrogenD. Sulfur. Answer: B. Iron deficiency
⩥ Manure applied to frozen ground is restricted primarily under which
WI rule?A. ATCP 50B. ATCP 29C. NRCS 590D. EPA 503. Answer: A.
ATCP 50
⩥ A corn field shows purple leaves in early spring. Most likely cause?A.
Nitrogen deficiencyB. Phosphorus deficiency from cold soilsC.
Potassium deficiencyD. Sulfur deficiency. Answer: B. Phosphorus
deficiency from cold soils
⩥ What is the recommended sampling depth for routine soil tests in
Wisconsin?A. 6 inchesB. 3 inchesC. 12 inchesD. 18 inches. Answer: A.
6 inches
