Agronomy Math Questions
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. - answer28
acres
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? -
answer4.54 tons
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? - answer2 gallons of Aatrex and 80 gallons of water
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? -
answer$6,544
How many acres are there in a rectangular parcel of land that measures 900 feet long
and 620 feet wide? - answer12.8
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? - answer2377 pounds
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? -
answer150
Given that the atomic weight of phosphorus is 31 and oxygen is 16, what is the
percentage of phosphorus in 100 pounds of P₂O₅? - answer43.70%
You have a rice field that measures 1350 ft. by 1452 ft. Your soil test recommends that
you apply 100 pounds of nitrogen per acre to this field. How much urea (46-0-0) do you
need to apply to this field to meet the recommendations? - answer4.89 tons
A bushel of corn at 15.5% moisture weighs 56 pounds. How much does a bushel of
corn weigh at 19% moisture? - answer68.6 pounds
, 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
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 feet by 1089
feet. The nozzles are 20 inches apart. How much herbicide and water will you need to
treat the field? - answer6.25 gallons of Prowl and 500 gallons of water
A Colorado producer has a center pivot sprinkler irrigating 200 acres of pinto beans. To
control weeds, he will chemigate 4.2 ounces of herbicide per acre on his field. How
many gallons of herbicide must he use to do this application? - answer6.5
Fertilizers are chemical compounds. The ratio of elements in a particular fertilizer
(chemical) can be easily calculated by knowing the weight of the individual components.
Given that the atomic weight of potassium is 39.1 (and you have two of these!) and
oxygen is 16, what is the percentage of potassium in 200 pounds of K₂O? - answer83%
A friend wants to plant his 125 acre corn field with a population of 32,000 plants per
acre. The seed he will purchase has 80,000 kernels per bag. The germination rate is
99%. How many bags of seed does he need to purchase? - answer51 bags
An accurate estimate of a plant population per acre can be obtained by counting the
number of plants in a length of row equal to one-thousandth (1/1000) of an acre. How
many feet equals one one-thousandth of an acre based on 30 inch row spacing? -
answer17 feet 5 inches
You are purchasing hay and have a choice between two lots of alfalfa hay that are
equal in quality and both are selling for $150 a ton. There is only one difference: lot A is
10% moisture and lot B is 15% moisture. What is the actual price per ton of dry matter
for each lot of hay? Round to the nearest dollar. - answerA = $167 and B = $176
You have planted 100 acres of winter wheat, and you realize that the price of cattle is
pretty good and the price of wheat is uncertain. So, you decide to contract graze some
stocker cattle on your wheat. You can graze their cattle for approximately 42 days from
about mid-February until April 1st (you need to remove the cattle by the first hollow stem
since you want to retain the option of a grain harvest). You estimate that you can safely
remove 1500 lbs/acre of forage (on a dry basis) over the 42 day period (about 35 lbs
per acre per day). Animals are expected to gain 2 lbs per day. Average animal forage
intake is 3% of body weight per day (dry forage). How many 500 lb steers should you
contract? - answer200
A local farmer wants to apply a total of 190 pounds of nitrogen per acre on his rice field.
He has spread 8 tons per acre of dry manure with an average analysis of 10 pounds of
nitrogen per ton. How many additional pounds of nitrogen must he apply? - answer110
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. - answer28
acres
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? -
answer4.54 tons
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? - answer2 gallons of Aatrex and 80 gallons of water
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? -
answer$6,544
How many acres are there in a rectangular parcel of land that measures 900 feet long
and 620 feet wide? - answer12.8
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? - answer2377 pounds
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? -
answer150
Given that the atomic weight of phosphorus is 31 and oxygen is 16, what is the
percentage of phosphorus in 100 pounds of P₂O₅? - answer43.70%
You have a rice field that measures 1350 ft. by 1452 ft. Your soil test recommends that
you apply 100 pounds of nitrogen per acre to this field. How much urea (46-0-0) do you
need to apply to this field to meet the recommendations? - answer4.89 tons
A bushel of corn at 15.5% moisture weighs 56 pounds. How much does a bushel of
corn weigh at 19% moisture? - answer68.6 pounds
, 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
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 feet by 1089
feet. The nozzles are 20 inches apart. How much herbicide and water will you need to
treat the field? - answer6.25 gallons of Prowl and 500 gallons of water
A Colorado producer has a center pivot sprinkler irrigating 200 acres of pinto beans. To
control weeds, he will chemigate 4.2 ounces of herbicide per acre on his field. How
many gallons of herbicide must he use to do this application? - answer6.5
Fertilizers are chemical compounds. The ratio of elements in a particular fertilizer
(chemical) can be easily calculated by knowing the weight of the individual components.
Given that the atomic weight of potassium is 39.1 (and you have two of these!) and
oxygen is 16, what is the percentage of potassium in 200 pounds of K₂O? - answer83%
A friend wants to plant his 125 acre corn field with a population of 32,000 plants per
acre. The seed he will purchase has 80,000 kernels per bag. The germination rate is
99%. How many bags of seed does he need to purchase? - answer51 bags
An accurate estimate of a plant population per acre can be obtained by counting the
number of plants in a length of row equal to one-thousandth (1/1000) of an acre. How
many feet equals one one-thousandth of an acre based on 30 inch row spacing? -
answer17 feet 5 inches
You are purchasing hay and have a choice between two lots of alfalfa hay that are
equal in quality and both are selling for $150 a ton. There is only one difference: lot A is
10% moisture and lot B is 15% moisture. What is the actual price per ton of dry matter
for each lot of hay? Round to the nearest dollar. - answerA = $167 and B = $176
You have planted 100 acres of winter wheat, and you realize that the price of cattle is
pretty good and the price of wheat is uncertain. So, you decide to contract graze some
stocker cattle on your wheat. You can graze their cattle for approximately 42 days from
about mid-February until April 1st (you need to remove the cattle by the first hollow stem
since you want to retain the option of a grain harvest). You estimate that you can safely
remove 1500 lbs/acre of forage (on a dry basis) over the 42 day period (about 35 lbs
per acre per day). Animals are expected to gain 2 lbs per day. Average animal forage
intake is 3% of body weight per day (dry forage). How many 500 lb steers should you
contract? - answer200
A local farmer wants to apply a total of 190 pounds of nitrogen per acre on his rice field.
He has spread 8 tons per acre of dry manure with an average analysis of 10 pounds of
nitrogen per ton. How many additional pounds of nitrogen must he apply? - answer110
