You may answer each question as many times as necessary to obtain the correct answer. You must answer ALL questions.Your progress will be tracked automatically.
Nitrogen soil tests are _____________ for making nitrogen fertilizer recommendations.
frequently used
not used
incorrect
none of the above
In the absence of soil test recommendations, apply _______ pound(s) of actual nitrogen fertilizer per 1,000 square feet of lawn at one time.
1
2
3
4
Organic combinations of elements must be reduced to some soluble, inorganic form before_________________.
converted to fertilizer
composting
being absorbed by plants
all of the above
Nitrogen is present in soils in the form of _________________________.
nitrate
ammonium
a component of soil organic matter
all of the above
A ___________________ is a slowly available form of iron.
slurry
fertilizer concentrate
chelate
compressed fertilizer pellet
Of all the fertilizer nutrients, ________________________ generally produces the greatest growth response in plants.
nitrogen
phosphorous
potassium
magnesium
The numbers 10-10-10, 10-5-10, 24-3-3, 15-30-15 etc. (in this order) stand for the percentage of _____________________ in a fertilizer.
phosphorous, potassium, nitrogen
nitrogen, phosphorous, potassium
nitrogen, Iron, Zinc
nitrogen, potassium, phosphorous
Inorganic phosphorus moves _______________ in soil.
very little
frequently
upward
rapidly downward
The major sources of phosphorus in runoff are from_______________________.
water moving over bare soil
lawn clippings and tree leaves left in streets and gutters
soil from wind erosion
all of the above
A routine soil test is recommended to determine existing soil phosphorus levels before ___________________________.
tilling beds
selecting a fertilizer
planting
adding organic matter
_______________________ are the two fertilizer nutrients which pose the greatest risk for contamination of surface and groundwater.
Iron and zinc
Nitrogen and potassium
Nitrogen and phosphorus
None of the above
Water with over ____________ part(s) per million nitrate-nitrogen can create (methemoglobinemia) an inability among infants to use oxygen.
1
3
5
10
In the absence of soil test recommendations, fertilize landscape areas at a rate of _______________ pounds of actual nitrogen per 1000 square feet of bed area.
