Fertilizer Lesson 1 Packet Practice Exam
Fertilizer Lesson 1 Packet Practice Exam Key
Fertilizer Lesson 2 Packet Practice Exam OER
Fertilizer
Overview
- Fertilizer Lesson 1A Video
- Complete Fertilizer Packet Lesson 1A
- Class study session for help or a workday
- Fertilizer Lesson 1B Video
- Complete Fertilizer Packet Lesson 1B
- Class study session for help or a workday - Complete Fertilizer Lesson 1A & 1B Packet Practice Exam
- Fertilizer Lesson 2 Video
- Complete Fertilizer Packet Lesson 2
- Class study session for help or a workday - Complete Fertilizer Lesson 2 Packet Practice Exam
- Pesticide Lesson 1A, 1B, and 2 Exam (30 pts)
Fertilizer Lesson 1
Fertilizer Lesson 1A Packet
Part I: Powerpoint or Lecture Based Lesson
1. Conversions to memorize (optional)
2. Four basic methods of application
3. Name and analysis of common fertilizers
4. Reading analysis of fertilizer
Part II: Video 1A - Remember how to write fertilizer percent from analysis as a number
1. How much nutrients are in fertilizer
2. How much fertilizer to apply given nutrient amount
3. Cost of nutrient in a fertilizer
4. Complete Practice Packet Problems:
a. How much nutrients are in fertilizer
b. How much fertilizer to apply give nutrients
c. Cost of nutrient in a fertilizer
Some Helpful Steps for finding $/lb of nutrient in a fertilizer when there are two nutrients (like in MAP or DAP)
1. Assign a value to the nitrogen fertilizer usually in $/lb - (for dry fertilizer we use value of Urea)
2. Find the value of nitrogen in one ton of the selected fertilizer (answer will be in $/ton of fertilizer)
3. Take the total price of the fertilizer ($/ton of fertilizer) and subtract the value of nitrogen in one ton of fertilizer (answer from 2: $/ ton of fertilizer)
4. Find $/ lb of second nutrient that is NOT nitrogen using your adjusted price per ton ($/ton of fertilizer) from number three. Usually we are finding $/lb P2O5.
Fertilizer Lesson 1B Packet
Remember fertilizers are made of nutrients and inert matter. Nutrient analysis tells us how much nutrient (by %) is in the fertilizer
1. Review a price for each nutrient (NPKS) in a fertilizer (urea, MAP, DAP, AMS, Potash) --> $/lb nutrient
2. Liquid Fertilizers --> print chart for test! à https://fluidfertilizer.org/wp-content/uploads/2016/09/Fluid-Fertilizer-Density-1.pdf
3. Fertilizer Analysis --> make a blend what is the new analysis --> make a chart
4. Soil Test Nutrient Amount --> Applied Fertilizer Amount to Blend
- Work from right to left when going from nutrient to apply to fertilizer amount to blend--> start with sulfur - potassium - phosphorus - nitrogen
- If a fertilizer answer from step a. has multiple nutrients, you need to find how much nitrogen is in applied amount of fertilizer from step a
- Nitrogen recommendation subtract any found amounts from letter b.
- Find new nitrogen recommendation from c. with the fertilizer urea (dry and N)
5. Given a nutrient analysis and weight total; how much of each fertilizer do you blend
6. Complete Practice Packet Problems:
a. Liquid Fertilizers determining volumes
b. Fertilizer Analysis Questions
c. Soil Test Nutrient Amount --> Applied Fertilizer Amount to Blend
d. Analysis to Blend
Lesson 1A Part I
1. Ag Math Conversions
Length |
1ft = 12 in |
1 inch = 2.54 cm |
Area |
1 section = 1 sq mile = 640 acres |
1 acre = 43560 sq ft |
Capacity |
1 gal = 4 qt = 8 pts = 16 cups = 128 fl oz |
Weight |
1 ton = 2000 lbs |
1lb = 16 oz |
Crop | Standard bushel weight | Standard grain moisture content |
Barley | 48 | 14.50% |
Oats | 32 | 14% |
Rye | 56 | 14% |
Wheat | 60 | 13.50% |
Corn | 56 | 15.50% |
Soybean | 60 | 13% |
2. Four Application Methods – found at https://courses.cit.cornell.edu/css412/mod5/ext_m5_pg3.htm
- Band applications
- Pop-up/starter applications
- Broadcast or topdress applications
- Sidedress applications
3. Name and analysis of common fertilizers
Fertilizer Name | Fertilizer Analysis | Liquid or Granular |
Anhydrous Ammonia | 82-0-0 | Liquid under pressure, gas at reduced pressure |
Urea | 46-0-0 | Granular |
UAN | 28-0-0 to 32-0-0 | Liquid |
AMS | 21-0-0-24S | Granular |
Ammonium Polyphosphate | 10-34-0 | Liquid |
MAP | 11-52-0 | Granular |
DAP | 18-46-0 | Granular |
Potash | 0-0-60 | Granular |
4. Reading Analysis of Fertilizer
Fertilizer Practice Packet Name: _____________________________________
References:
Fertilizer Grade | Fertilizer Name |
46-0-0 | Urea (dry or liquid) |
82-0-0 | Anhydrous Ammonia |
11-52-0 | MAP – Mono-Ammonium Phosphate (Dry) |
10-34-0 | Liquid Ammonium Polyphosphate |
18-46-0 | DAP – Di-Ammonium Phosphate (Dry) |
0-0-60 | Potash (Dry or liquid) |
21-0-0-24 (S) | AMS – Ammonium Sulfate |
Fertilizer | Price |
Anhydrous Ammonia | $598 per ton |
Urea | $380 per ton |
UAN (28 – 0 – 0) | $215 per 1000 gallons |
DAP | $490 per ton |
Potash | $378 per ton |
MAP (Monoammonium phosphate) | $505 per ton |
AMS (Ammonium sulfate) | $350 per ton |
How much nutrients are in fertilizer?
- Jeff has a ton of UAN. How many pounds of nitrogen are in it?
- How much K20 is in a 75 pound bag of 10 – 20 – 20?
- Sally has 45 tons of AMS. How much sulfur is in 100 pounds of AMS?
- . How much sulfur is in 3 tons of AMS? (Give answer in pounds)
- How much P2O5 is in 4 tons of MAP? (Give answer in pounds)
How much fertilizer to apply given nutrients
- You want 150 pounds on nitrogen applied per acre.
- How much anhydrous would you have to apply to hit this goal (lbs/acre)?
- How much does this anhydrous cost per acre?
- How much urea would you have to apply to hit this goal (lbs/acre)?
- How much does this urea cost per acre?
- How much DAP would you have to apply to hit this goal (lbs/acre)?
- How much does this DAP cost per acre?
- How much MAP do you have to apply to get 45 pounds of P2O5 per acre? How much will it cost for this MAP?
- You want to put down 55 pounds of sulfur per acre. How much AMS do you apply? How much will it cost for this AMS?
Liquid Fertilizers determining volumes – use linked chart on liquid fertilizer densities
- You want to apply 10 pounds of UAN per acre. How many gallons is this?
- You want to apply 75 pounds of Liquid Ammonium Polyphosphate per acre. How many gallons is this?
- You want to apply 30 pounds of nitrogen per acre. How many gallons of UAN should you apply per acre? How much will it cost to apply this to 1000 acres?
- You want to apply 30 pounds of phosphorus (P2O5) per acre. How many gallons of Liquid Ammonium Polyphosphate do you put down per acre?
- How much nitrogen is in 3000 gallons of UAN?
- How much P2O5 is in 40 gallons of Liquid Ammonium Polyphosphate?
- You want to apply 30 pounds of nitrogen per acre. How many gallons of UAN plus sulfur (28-0-0- 5S) should you apply per acre?
NOTE: Sometimes liquid fertilizer rate should be adjusted on temperature – you will just refigure density
Cost of nutrient in a fertilizer
- What is the cost for 1 pound of nitrogen in:
- Urea
- Anhydrous
- What is the cost for 1 pound of phosphorus in. Given the price of urea in the above problem.
- MAP
- Assign a value to the nitrogen fertilizer usually in $/lb - (for dry fertilizer we use value of Urea)
- Find the value of nitrogen in one ton of the selected fertilizer (answer will be in $/ton of fertilizer)
- Take the total price of the fertilizer ($/ton of fertilizer) and subtract the value of nitrogen in one ton of fertilizer (answer from 2: $/ ton of fertilizer)
- Find $/ lb of second nutrient that is NOT nitrogen using your adjusted price per ton ($/ton of fertilizer) from number three. Usually we are finding $/lb P2O5.
- MAP
- DAP
- Assign a value to the nitrogen fertilizer usually in $/lb - (for dry fertilizer we use value of Urea)
- Find the value of nitrogen in one ton of the selected fertilizer (answer will be in $/ton of fertilizer)
- Take the total price of the fertilizer ($/ton of fertilizer) and subtract the value of nitrogen in one ton of fertilizer (answer from 2: $/ ton of fertilizer)
- Find $/ lb of second nutrient that is NOT nitrogen using your adjusted price per ton ($/ton of fertilizer) from number three. Usually we are finding $/lb P2O5.
- DAP
- Repeat number two put adjust the prices of MAP to $450/ton and DAP to $400/ton and a urea price of $0.50 per 1 pound of nitrogen
- MAP
- Assign a value to the nitrogen fertilizer usually in $/lb - (for dry fertilizer we use value of Urea)
- Find the value of nitrogen in one ton of the selected fertilizer (answer will be in $/ton of fertilizer)
- Take the total price of the fertilizer ($/ton of fertilizer) and subtract the value of nitrogen in one ton of fertilizer (answer from 2: $/ ton of fertilizer)
- Find $/ lb of second nutrient that is NOT nitrogen using your adjusted price per ton ($/ton of fertilizer) from number three. Usually we are finding $/lb P2O5.
- MAP
- DAP
- Assign a value to the nitrogen fertilizer usually in $/lb - (for dry fertilizer we use value of Urea)
- Find the value of nitrogen in one ton of the selected fertilizer (answer will be in $/ton of fertilizer)
- Take the total price of the fertilizer ($/ton of fertilizer) and subtract the value of nitrogen in one ton of fertilizer (answer from 2: $/ ton of fertilizer)
- Find $/ lb of second nutrient that is NOT nitrogen using your adjusted price per ton ($/ton of fertilizer) from number three. Usually we are finding $/lb P2O5.
- DAP
- How much will it cost you to apply 20 pounds of P2O5 per acre on 1000 acres using DAP?
Fertilizer Analysis Questions
- What is the analysis/grade of a mix of 2000 pounds of urea and 500 pounds of DAP?
- What is the analysis/grade of a mix of 1000 pounds of urea, 200 pounds of AMS, and 200 pounds of MAP
- What is the analysis/grade of a mix of 1000 pounds of urea, 200 pounds of potash, 200 pounds of AMS, and 100 pounds of DAP?
Soil Test Nutrient Amount --> Applied Fertilizer Amount to Blend
- You want to apply 100 pounds of nitrogen and 20 pounds of P2O5 using Urea and DAP. How much of each fertilizer to you blend?
- You want to apply 120 pounds of nitrogen, 10 pounds of P2O5, and 10 pounds of K20 using Urea, potash, and DAP. How much of each fertilizer to you blend?
- You want to apply 90 pounds of nitrogen, 15 pounds of P2O5, and 10 pounds of sulfur using Urea, AMS, and DAP. How much of each fertilizer to you blend?
- You want to apply 80 pounds of nitrogen, 9 pounds of P2O5, and 9 pounds of K2O using Urea, potash, and DAP. How much of each fertilizer to you blend?
Analysis to Blend
- Katherine wants a blend of 34 -0 – 0 – 18 (S). You will blend urea and AMS to get this. She wants 10 tons of the mix. How much of each fertilizer do you blend?
- Brittney wants to make a blend of 5 – 8 – 8 . She will use Urea potash and MAP. She wants 4 tons of the mix. How much of each fertilizer do you blend for her?
Fertilizer Lesson 2
Fertilizer Lesson 2 Packet
Main Idea --> Go from a soil test to a fertilizer recommendation
Ways that fertilizer recommendations are done:
1. Soil Testing company gives recommendation
2. Agronomist gives recommendation (many of you will be the agronomist)
3. You use resources from NDSU or your company and give a fertilizer recommendation based on soil test
4. Based on estimated removal or standard rate
We will use the NDSU method --> New and Traditional
1. Traditional
- Print ND Pre 2018 Soil Recs - https://www.haifa-group.com/sites/default/files/article/sf882.pdf
- Use
- Formulas from table to find amount of NPK to apply
- Refer to soil test to find any nutrient in soil (N)
- Repeat steps from lesson 1B Soil Test Nutrient Amount --> Applied Fertilizer Amount to Blend
2. New Method
- Print ND Fertility Packet 2018 - https://www.ag.ndsu.edu/publications/crops/north-dakota-fertilizer-recommendation-tables-and-equations/sf882.pdf
- Use NO formulas - just a baseline number to find how much nutrient to apply
- Use chart to find how much nutrient to apply
- Refer to soil test to find any nutrient in soil (N)
- Repeat steps from lesson 1B Soil Test Nutrient Amount --> Applied Fertilizer Amount to Blend
Soil Test Nutrient Amount --> Applied Fertilizer Amount to Blend
- Work from right to left when going from nutrient to apply to fertilizer amount to blend--> start with sulfur - potassium - phosphorus - nitrogen
- If a fertilizer answer from step a. has multiple nutrients, you need to find how much nitrogen is in applied amount of fertilizer from step a
- Nitrogen recommendation subtract any found amounts from letter b.
- Find new nitrogen recommendation from c. with the fertilizer urea (dry and N)
Complete Soil Test Values to Nutrient to Fertilizer Recommendations
Fertilizer Lesson 2 Packet
Soil Test Values to Nutrient to Fertilizer Recommendations Name: ________________________
Answer the following using both ND Soil Fertility Packets – old and new (charts found at links above) and the soil test below each problem. Problems 1-2 will be done as examples. Complete problems 3-5 as homework to bring to class. Grades of fertilizer (the 46-0-0) are given on last page. The soil test is found beneath the problem.
- Find how much N, P, K, and potentially S are needed given – Yield Potential 100 bushels/acre:
- Using the NDSU soil guide, how much nitrogen would you have to apply for malting grade barley in warmer drier climates if you have done no-till for greater than 10 years?
- Using the NDSU soil guide, how much P2O5 would you have to apply for malting grade barley in warmer drier climates if you have done no-till for greater than 10 years?
- Using the NDSU soil guide, how much K2O would you have to apply for malting grade barley in warmer drier climates if you have done no-till for greater than 10 years?
- Create a blend from answers a-c using urea, DAP, and potash.
- Find how much N, P, K, and potentially S are needed- Yield Potential 2200 lbs/acre:
- Using the NDSU soil guide, how much nitrogen would you have to apply for canola in a cooler and moister environment?
- Using the NDSU soil guide, how much P2O5 would you have to apply for canola in a cooler and moister environment?
- Using the NDSU soil guide, how much K2O would you have to apply for canola in a cooler and moister environment?
- Using the NDSU soil guide, how much sulfur would you have to apply for canola in a cooler and moister environment?
- Create a blend from answers a-c using urea, DAP, AMS, and potash.
- Find how much N, P, K, and potentially S are needed given soil test below values – Yield Potential 16 tons/acre:
- Using the NDSU soil guide, how much nitrogen would you have to apply for tilled ground planted in silage corn?
- Using the NDSU soil guide, how much P2O5 would you have to apply for tilled ground planted in silage corn?
- Using the NDSU soil guide, how much K2O would you have to apply for tilled ground planted in silage corn?
- Create a blend from answers a-c using urea, DAP, and potash.
- Find how much N, P, K, and potentially S are needed given – Yield Potential 1400 lbs/acre:
- Using the NDSU soil guide, how much nitrogen would you have to apply for no-till safflower?
- Using the NDSU soil guide, how much P2O5 would you have to apply for no-till safflower?
- Using the NDSU soil guide, how much K2O would you have to apply for no-till safflower?
- Create a blend from answers a-c using urea, DAP, and potash.
- Find how much N, P, K, and potentially S are needed given below soil test values – 33 bu/acre:
- Using the NDSU soil guide, how much nitrogen would you have to apply for tilled ground planted in buckwheat?
- Using the NDSU soil guide, how much P2O5 would you have to apply for tilled ground planted in buckwheat?
- Using the NDSU soil guide, how much K2O would you have to apply for tilled ground planted in buckwheat?
- Create a blend from answers a-c using urea, DAP, and potash.
Fertilizer Grade | Fertilizer Name |
46-0-0 | Urea (dry or liquid) |
82-0-0 | Anhydrous Ammonia |
11-52-0 | MAP – Mono-Ammonium Phosphate (Dry) |
10-34-0 | Liquid Ammonium Polyphosphate |
18-46-0 | DAP – Di-Ammonium Phosphate (Dry) |
0-0-60 | Potash (Dry or liquid) |
21-0-0-24 (S) | AMS – Ammonium Sulfate |