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Illinois FFA Agronomy CDE Test Questions Practice Questions and Complete Solutions Graded A+
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Illinois FFA Agronomy CDE Test Questions Practice Questions and Complete Solutions Graded A+
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Illinois FFA AgronomyCDE Test Questions
Practice Questions and
Complete Solutions
Graded A+
A bushel of corn at 15.5% moisture weighs 56 pounds. How much does a bushel of corn weight at 19%? -
Answer: 68.6
A pesticide is most likely to pollute groundwater if it has what characteristic? - Answer: High solubility
The main purpose of flooding a rice field is to control weeds. How can this be a negative impact? -
Answer: Reduced leaf area and grain yield
If the recommended seeding rate for wheat is 13-21 seeds per foot within a 7 inch row, what would
happen if the rate was increased to 50 seeds per foot within a 7 inch row? - Answer: Disease and lodging
would increase
How is a sugarcane field established? - Answer: Planted using sugarcane stem pieces called billets
How many acres are there in a rectangle parcel of land that must be measures 800 feet long and 620
feet wide? - Answer: 11.4
What tools do the USDA use to detect and monitor a new crop disease problem? - Answer: Sentinel
plots, agent scouting, disease forecast models
,Your broadleaf plants exhibit cupping of the leaves and epinasty. What herbicide would most likely
cause such an injury? - Answer: Growth regulators
You are applying Banvel 4f at a rate of 1/2 pint per acre using 20 gallons of water per acre of application.
You are traveling at 4.5 MPH. The nozzles are 20 inches apart. What is the output for each nozzle? -
Answer: .30 GPM
What conditions favor the spread of a new disease from South America into the United States, such as
Soybean Asian Rust? - Answer: Large tropical storms and hot, humid weather
A Colorado producer has a center pivot sprinkler irrigating 200 acres of pinto beans. To control weeds he
will chemigate 24 ounces of herbicide per acre on his field. How many gallons of herbicide must he use
to do this application? - Answer: 6.5
A pesticide that can only be handled and applied by a certified applicator is called a ___ use pesticide. -
Answer: Restricted Pesticide
What is the most important concept in pesticide application? - Answer: Read the label
Conservation programs, such as CRP & EQIP are administered by which of the following governmental
agencies? - Answer: National Resource Conservation Service
USDA defines HEL (highly erodible land) aa having a erodibility index (EI) of 8 or more. This EL is ratio of
the inherent erodibility of a soil to the soil loss tolerance. The soil loss tolerance, or "T" values is what? -
Answer: An estimate of the rate of soil erosion than can occur on a given soil with out significant long-
term productivity loss
Vernalizarionis a common requirement for temperate climate species before reproduction can occur.
What does this term refer to? - Answer: Cold treatment of a plant or seed
Hypogeal seedling emergence is characteristic of what? - Answer: Corn & garden pea
,Which of the following diseases are viruses are most likely to cause? - Answer: Tobacco Mosaic (TMV),
Tomato Spotted Wilt (TSWV)
Your tomatoes are planted in 30 inch rows. In 17 ft. 5 in. Of row in length you count 21 pants. What is
your estimated plant population per acre? - Answer: 25,400
What are the four main groups that plant pathogens consist of? - Answer: Viruses, fungi, bacteria, and
nematodes
What crop species is primarily cross pollinated? - Answer: Corn & alfalfa
What plant disease is caused by a virus? - Answer: Barley yellow dawrf
Soil herbicides that exhibit differential selectivity are generally based on what? - Answer: Differential
metabolism & placement
What plant is a dicotyledonous (2 sets of chromosomes) species in the botanical family Gramineae? -
Answer: Corn
Why do some plants not re-grow when hey are cut? - Answer: They are annuals & are determinant
Parallel venation in a plant leaf would be a characteristic of what plant? - Answer: Corn
Looking at an Atrazine 4F label, what does the F stand for? - Answer: Strength rating
You are applying Prowl 3.3EC at a rate of 2 pints per acre using 20 gallons of water per acre of
application. You are traveling at 4.5 MPH. The field size is 1000 ft x 1089 ft. The nozzles are 20 inches
apart. How much herbicide and water will you need to treat this feild? - Answer: 6.25 gallons of Prowl &
500 gallons of water
What factors in seed germination are NOT enzymatically controlled? - Answer: Imbibition of water
, In corn production R1 refers to what? - Answer: Silking
What is the micro-nutrient that would cause the leaves to apper to be somewhat striped when pH is
high and it becomes deficient? - Answer: Zinc
What activities are most apt to result in a long term soil PH increase? - Answer: Irrigation with water
obtaining high levels of salt
What is the soil type that requires the greatest amount of lime to bring up a low pH condition? - Answer:
Clay loam
The loam soil texture group contains many subdivisions. Define loam. - Answer: A mixture of sand, silt,
and clay particles that exhibits light and heavy properties in about equal proportion
The carbon/nitrogen (C/N) ratio in soil is important for at lease two reasons. First, competition for
available for nitrogen results when residues having a high C/N ratio are added to soils. Second, because
this ratio is relatively constant in soils, the maintenance of carbon (and hence soil organic matter) is
largely dependent on what? - Answer: Soil nitrogen level
Given that the atomic weight of phosphorus is 31 and oxygen is 16, what is the percentage of
phosphorus in 100 pounds of P2O5 - Answer: 43.7%
Johngrass is a serious weed problem in crops such as corn and sugarcane because... - Answer:
Perreniates & spreads by rhizomes, produces a lot of seed, it is resistant to most corn & sugarcane
herbicides
You are with a non-FFA friend at a local home and garden supply store and you are passing through the
fertilizer aisle. Your friend notices that all of your bags of fertilizer have three numbers on them each
separated by a hyphen. Your friend also notices a bag that has a very high first number and much lower
second and thrid numbers. You explain to your friend that this designation means that this fertilizer... -
Answer: Has a high nitrogen content and is probably intended for lawn application
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