Browse topic-based Biomedical Engineering practice sets.
587 practice sets · Page 29 of 30
Which of the following is the most common liquid fertilizer carrier that supplies both nitrogen and phosphorus with an analysis of 10-34-0?
urea
urea-ammonium nitrate (UAN)
di-ammonium phosphate (DAP)
ammonium polyphosphate (APP)
Which of the following conditions would not likely be a result of using a no-till system that leaves crop residue on the soil surface versus incorporating the residue with tillage?
more water infiltration
less overwintering of insect and disease pests
cooler soil temperature
less wind and water erosion
To slow the development of insect resistance (Insect Resistance Management) in crops genetically engineered with Bt technology, farmers have been required to plant a portion (usually 20%) of the field to non-Bt hybrids as a refuge. Some new corn hybrids like Pioneer Optimum® AcreMax™ now include RIB technology which means:
There is no longer any refuge requirement since there are multiple resistance genes in these new hybrids (stacked traits)
The refuge requirement is reduced to 5% of the field that must be planted in a separate area
The non-BT seed is mixed in the bag, thus no separate refuge area needs to be planted
The refuge requirement has been increased to 30% of the field since rootworm resistance was reported in the Corn Belt last year
The wheat diseases soil borne mosaic, streak mosaic, and barley yellow dwarf are all caused by:
viruses
bacteria
nematodes
fungi
The top two crops in value in the US and Kansas are:
corn and soybeans in the US; wheat and soybeans in Kansas
corn and wheat in the US; corn and wheat in Kansas
wheat and soybeans in the US; corn and wheat in Kansas
corn and soybeans in the US; corn and wheat in Kansas
The practice of no-till planting grain sorghum into the stubble of a wheat crop immediately after wheat harvest in late June is called:
fallowing
intercropping
double cropping
strip cropping
The phrase dusting it in when used in wheat production refers to:
planting the seed very deep into a layer of soil moisture to get below a dry surface layer
planting the seed at recommended depth into a loose, well-tilled soil with good moisture
planting the seed shallow into a dry soil surface hoping for a rain so it can germinate later
planting the seed at recommended depth with a no-till drill which cuts through the residue left from a previous crop to get good seed-to-soil contact
The greatest yield reduction due to drought stress in soybean varieties typically grown in Kansas= generally results when the stress occurs during the:
seedling emergence stage resulting in decreased plant population
early vegetative stage resulting in shorter plants with less leaves
early flowering stage resulting in poor pollination of the early flowers
pod development stage resulting in high pod abortion and reduced pods per plant
Syngenta and Monsanto both began selling all soybean seed by count in 2011, and other companies are expected to move quickly to bagging soybean seed by count. The standard seed count for these soybean seed bags is:
80000
100000
140000
160000
Sprinker irrigation systems have an advantage over furrow irrigation systems for all of the following except:
more uniform application of water with sprinkler
less energy required to pump and distribute water with sprinkler
lower labor costs with sprinkler
less land leveling needed with sprinkler
Prussic acid poisoning is a potential problem for livestock grazing which of the following forage crops?
alfalfa
winter wheat
tall fescue
sorghum stalks
Presence of high amounts of which of the following substances is the primary concern related to the quality of ground water used for irrigation:
coli bacteria
salts
pesticide residues
nitrates
Pigweed, velvetleaf, and giant ragweed are all problem weeds in row crops in Kansas that are classified as:
perennial broadleaves
winter annual grasses
summer annual grasses
summer annual broadleaves
Phosphorus from fertilizer or manure is most likely to be lost from crop fields, and thus may harm the environment, by:
runoff into surface water (contributing to eutrophication of lakes and streams)
leaching into groundwater (contaminating wells used for drinking water)
volatilization into the atmosphere as a greenhouse gas (contributing to global warming)
all of the above are equally common ways phosphorus is lost from soils
Most of the stored food energy used for germination in a corn seed is located in the:
endosperm
cotyledon
coleoptile
pericarp
If a farmer in Central Kansas planted both a Maturity Group 3 and a Maturity Group 4 variety on the same date, which of the following crops did he plant, and what will be the most likely result?
The crop is corn and the Group 3 variety would start flowering first
The crop is soybean and the Group 3 variety would start flowering first
The crop is corn and the Group 4 variety would start flowering first
The crop is soybean and the Group 4 variety would start flowering first
European corn borers cause damage to corn by
feeding on the roots during the larval stage
feeding on the roots during the adult stage
feeding in the stalks during the larval stage
feeding in the stalks during the adult stage
Corn reproductive growth stages start with silking (R1) and end with physiological maturity (R6). The descriptive terms for the other four reproductive stages, in sequential order from R2 through R5, is:
blister - milk - dent - dough
milk - dough - blister - dent
milk - blister - dough - dent
blister - milk - dough - dent
Cattle grazing older, established tall fescue pastures results in poor weight gains, poor body condition, fever, lameness, and in some cases a loss of hooves and tail tips. The likely cause is:
prussic acid that accumulates in the new regrowth
nitrate that accumulates in the stems, especially when high rates of N fertilizer are used
fescue toxicosis from an alkaloid produced by an endophyte fungus living within plants
fescue toxicosis from a hallucinogenic compound from ergot sclerotia that replace the seed
Broadcast application of dry urea fertilizer to an established field of tall fescue in early March is called:
banding
topdressing
fertigation
sidedressing
