Agronomy Test Bank | Questions & Answers (100 %Score) Latest Updated 2024/2025
Comprehensive Questions A+ Graded Answers | With Expert Solutions
A conservation buffer is designed to accomplish which of the following goals? - all of
these
Under the Conservation Reserve Plan (CRP), producers: - all of these
Seed that are viable (alive) may fail to germinate when planted. Failure of this seed to
germinate may be caused by: - hard seed coat or dormancy
Which of the following crop species are primarily cross pollinated? - corn and alfalfa
Application of nitrogen to legume forage crops such as alfalfa and red clover is not
recommended since: - with the help of bacteria, these crops can fix atmospheric
nitrogen
You have a bunker silo that will hold 400 tons of wet corn silage packed at an average
density. If you anticipate corn silage yields of 5 tons per acre of dry matter (harvested at
35% dry matter), how many acres of corn will you need to plant in order to fill your
bunker silo at harvest? Round your answer to the nearest whole number. - 28 acres
Johnsongrass is a serious weed problem in crops such as corn and sugarcane
because: - all of these
Your cousin, who lives in southern Illinois, has a new job selling seed corn. He has four
varieties that he thinks you should try. Varieties A and B are 120 day corn, variety C is a
100 day corn and variety D is a 95 day corn. According to his yield trial data, variety A
yields more than variety B, but does not dry down as fast. Both A and B yield much
more than variety C or D. Variety D out yields variety C. Since you do not trust your
cousin, you don't want to buy any seed from him. However, he agrees to give you a free
bag of seed to try of one variety, but not of all four. Which variety would you try? -
Variety D
Each year, millions of acres of winter wheat in the central Plains of the US are utilized
as a dual purpose crop (forage and grain). The wheat is grazed early in the growing
season and cattle are subsequently removed. In order to get a grain crop, the livestock
must be removed before: - jointing stage
The first mechanical seed drill was invented in 1730 by: - Jethro Tull
Your neighbor had a field sprayed about two weeks ago while it was windy. Over the
period your lawn and flowers started turning yellow and died. Your shrubs also have
,some die back. Which of the following herbicide modes of action most likely caused this
damage? - Amino acid inhibitor
Which of the following species is a monocot? - Sorghum
Legumes can fix nitrogen from the atmosphere. Which of the following is a legume? -
White clover
Which of the following is considered a secondary nutrient? - Calcium
Which soil texture tends to have the highest Cation Exchange Capacity range? -
Organic soils
At which stage does corn require the most water? - Silking
Your soil test recommends 190 pounds of nitrogen per acre applied to your 22 acre rice
field. How much urea (46 - 0-0) do you need to apply to meet the recommendation? -
4.54 tons
Which of the following pesticide formulations is most damaging to spray equipment? -
Wettable powder (WP)
What is the most important concept when applying pesticides? - Read and follow the
label
Which of the following is most toxic? - An insecticide with an LD of 700
Generally, which nutrient deficiency causes tissues to turn yellow at a pH above 7.2? -
manganese
Which of the following nutrients is most mobile in soil solution? - boron
Which of the following soil types would have the highest organic matter? - muck
You are applying Aatrex 4E at a rate of 1 quart per acre using 10 gallons of water per
acre of application. You are traveling at 4.5 MPH, the nozzles are 20 inches apart, and
your boom length is 90 feet. How much Aatrex and water would you need for an 8 acre
field? - 2 gallons of Aatrex and 80 gallons of water
On what part of the plant does a bollworm feed? - fruit
Which of the following groups of essential elements are classified as micronutrients? -
Zn, Mn, and Mb
Maganese is essential to a crop plant for which of the following reasons? -
photosynthesis
,Plants grown on alkaline soils can suffer ill effects from: - Al and Mn deficiency
A pesticide is most likely to move offsite if it has which of the following characteristics? -
high volatility
To raise the potassium level of the soil in your field from 130 to 150 you would probably
want to spread _______ on your field. - Potash
A pesticide that can only be handled and applied by a certified applicator is called a
______ use pesticide. - restricted
Soil herbicides that exhibit differential selectivity are generally based on what? -
differential metabolism
You are applying 2,4 - D and it is important that you minimize spray drift. Which of the
following nozzle types would be the WORST choice to use? - hollow cone
A "transgenic" crop is any plant that: - has one or more foreign genes inserted via
molecular techniques
What plant characteristics should NOT be a primary consideration when selecting a
cultivar for planting? - seed size
Farmer Sarah has a half section of dryland wheat in western Kansas. She has her
wheat custom harvested and is quoted a cost of $11 per acre plus $0.21 per bushel
Sarah expects a yield of 45 bushels per acre. What are her total harvest costs? - $6,544
How many acres are there in a rectangular parcel of land that measures 900 feet long
and 620 feet wide? - 12.8
Grassy weeds can be identified based on morphological traits such as: - auricles and
ligules
Plant pathogens consist of four main groups. They are: - viruses, fungi, bacteria, and
nematodes
Which of the following diseases are bacteria most likely to cause? - Smuts
Nematodes are: - tiny little parasitic worms
Which of the following would be an advantage of increased organic matter? - all of
these are advantages
Generally, which of the following nutrient deficiencies causes interveinal chlorosis? -
manganese
, Which of the following crops uses the most nitrogen? - soybeans
Liebig's 1840 "Law of the Minimum" stated that: - the least available nutrient will limit
yield
Tomato spotted wilt virus (TSWV) affects which of the following crops? - All of these
The fertilizer recommendations that a farmer receives with the soil test results typically
vary the most with - crop and yield goal
You are planting 35 acres of pinto beans. You want to plant 60 pounds of viable seed
per acre. The seed you purchased is 95% pure with a germination of 93%. How many
actual pounds must you plant? - 2377 pounds
Which of the following tillage systems and residues would provide the most water
infiltration 1 hour after a rain? - no tillage, 80% residue cover
How many pound of alfalfa are in a 50 pound bale of alfalfa hay? - 50 pounds
Which of the following is a micro - nutrient that would cause the leaves to appear
somewhat striped when the pH is high and it becomes deficient? - Zinc
Which of the following activities is most apt to result in a long - term soil pH increase? -
irrigation with water containing high levels of salt
A corn producer wants to apply a total of 300 pounds of nitrogen per acre on his corn
field. He has spread 10 tons per acre of dry manure with an average analysis of 15
pounds of nitrogen per ton. How many additional pound of nitrogen must he apply? -
150
Which of the following nutrients is most mobile in the plant? - nitrogen
The loam soil textural group contains many subdivisions. An ideal loam may be defined
as: - a mixture of sand, silt, and clay particles that exhibits light and heavy properties in
about equal proportions
Which of the following soil types would require the greatest amount of lime to bring up a
low pH condition? - clay loam
The highest concentration of phosphorus in a plant is usually found in the - seed
Given that the atomic weight of phosphorus is 31 and oxygen is 16, what is the
percentage of phosphorus in 100 pounds of P₂O₅? - 43.70%
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