TURF 435 EXAM 2 QUESTIONS & ANSWERS
Which fertilizer is primarily comprised (more than half) of water insoluble N (WIN)?
Methylene urea
KNO3
urea
ureaform
triple super phosphate - Answer -ureaform
Which of the following environmental/edaphic conditions or post-application procedures
does NOT contribute to ammonia/urea volatilization from turfgrass systems?
soil pH >7.6
excessive thatch layer
temperatures exceeding 95 degrees F
applying a modest amount of irrigation
all of the these - Answer -applying a modest amount of irrigation
When temperature and soil water levels are within the optimal range for turfgrass
growth and all other things are equal; turfgrass vigor, density, and color often relate
directly to:
the moon phase
N availability
salinity
traffic
dow jones industrial avg. - Answer -N availability
Under which of the following environmental/edaphic conditions is availability of soil P
expected to be limited to turfgrass?
supra optimal soil pH
prolonged cold temperatures
suboptimal soil pH
predominately weathered, low-OM, and iron-rich clay soil
all of these - Answer -all of these
Which of the following physical traits of turf grasses does NOT increase as leaf N
sufficiency is raised from medium to high or very high N sufficiency?
leaf dark green color
shoot density
root length/growth
turf vigor/growth rate
, none of the above - Answer -root length/growth
When preparing a budget for next season, which of the following factors should NOT be
used to estimate/predict the annual N fertilizer requirement of a turfgrass system:
mean number of growing months in the season
expectation of your clientele
heritable traits of the resident turfgrass
intensity of culture
recent soil nitrite levels - Answer -recent soil nitrite levels
Which of the following cool season turfgrass species has the lowest general N
requirement?
annual bluegrass
creeping bentgrass
perennial ryegrass
rough bluegrass
sheep fescue - Answer -sheep fescue
Which of the following descriptions bet summarize a turfgrass nitrogen deficiency?
necrosis of the leaf margins
general chlorosis of older leaves and stunted growth
stunted growth
mottled coloration of new leaves
wilted appearance and poor vigor - Answer -general chlorosis of older leaves and
stunted growth
Which would be the best P2O5 source for correcting a P deficiency in young seedlings:
milorganite
potassium phosphite
DAP
urea
all are equally good choices - Answer -DAP
The majority of N fertilizers used in the cultural management of turfgrass:
increase soil pH
decrease soil pH
have no influence - Answer -decrease soil pH
A fertilizer with an average prill size of 1.75mm is designated what size guide number
(SGN)?
Which fertilizer is primarily comprised (more than half) of water insoluble N (WIN)?
Methylene urea
KNO3
urea
ureaform
triple super phosphate - Answer -ureaform
Which of the following environmental/edaphic conditions or post-application procedures
does NOT contribute to ammonia/urea volatilization from turfgrass systems?
soil pH >7.6
excessive thatch layer
temperatures exceeding 95 degrees F
applying a modest amount of irrigation
all of the these - Answer -applying a modest amount of irrigation
When temperature and soil water levels are within the optimal range for turfgrass
growth and all other things are equal; turfgrass vigor, density, and color often relate
directly to:
the moon phase
N availability
salinity
traffic
dow jones industrial avg. - Answer -N availability
Under which of the following environmental/edaphic conditions is availability of soil P
expected to be limited to turfgrass?
supra optimal soil pH
prolonged cold temperatures
suboptimal soil pH
predominately weathered, low-OM, and iron-rich clay soil
all of these - Answer -all of these
Which of the following physical traits of turf grasses does NOT increase as leaf N
sufficiency is raised from medium to high or very high N sufficiency?
leaf dark green color
shoot density
root length/growth
turf vigor/growth rate
, none of the above - Answer -root length/growth
When preparing a budget for next season, which of the following factors should NOT be
used to estimate/predict the annual N fertilizer requirement of a turfgrass system:
mean number of growing months in the season
expectation of your clientele
heritable traits of the resident turfgrass
intensity of culture
recent soil nitrite levels - Answer -recent soil nitrite levels
Which of the following cool season turfgrass species has the lowest general N
requirement?
annual bluegrass
creeping bentgrass
perennial ryegrass
rough bluegrass
sheep fescue - Answer -sheep fescue
Which of the following descriptions bet summarize a turfgrass nitrogen deficiency?
necrosis of the leaf margins
general chlorosis of older leaves and stunted growth
stunted growth
mottled coloration of new leaves
wilted appearance and poor vigor - Answer -general chlorosis of older leaves and
stunted growth
Which would be the best P2O5 source for correcting a P deficiency in young seedlings:
milorganite
potassium phosphite
DAP
urea
all are equally good choices - Answer -DAP
The majority of N fertilizers used in the cultural management of turfgrass:
increase soil pH
decrease soil pH
have no influence - Answer -decrease soil pH
A fertilizer with an average prill size of 1.75mm is designated what size guide number
(SGN)?
