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Useful Nutrient Management Planning Data

Filed Under:
Publication Number: IS1620
View as PDF: IS1620.pdf

Nutrient management plans should be based on accurate information. Ideally, manure generation and content should be determined on individual farms. Nutrients removed by harvesting crops also vary from farm to farm. The data provided here suggests general guidelines based on current research and can be used in preliminary planning.

Weights of crops (per bushel)

Crop

lb/bu

Crop

lb/bu

Corn

56

Rye

56

Sorghum

56

Sudangrass

40

Soybeans

60

Potatoes

60

Wheat

60

Sweetpotatoes

55

Barley

48

Sunflowers

25

Oats

32

   
 

Length/Weight Conversion Factors

Length

1 inch = 2.54 centimeters

1 yard = 0.915 meters

1 mile = 5,280 feet = 1,610.7 meters = 1.61 kilometers

1 meter = 100 centimeters = 1,000 millimeters = 0.001 kilometers

1 chain = 66 feet = 100 links = 20.1 meters = 4 rods

Weight

1 pound = 454 grams = 0.454 kilograms = 16 ounces

1 ton (short) = 2,000 pounds

1 ton (long) = 2,240 pounds

More Speed Conversion Factors

1 mile per hour

  • = 1.467 feet per second
  • = 88 feet per minute
  • = 26.8 meters per hour

Other

1 pound per acre = 1.12 kilograms per hectare

1 pound per gallon = 0.119 kilograms per liter

parts per million (ppm)

  • = micrograms per gram
  • = milligrams per liter

1 gallon per acre = 9.35 liter per hectare

Common Fertilizer Analyses

Fertilizer

Analysis

Chemical Formula

N

Anhydrous ammonia

82-0-0

NH3

Ammonium nitrate

34-0-0

NH4NO3

Urea

46-0-0

(NH2)2CO

UAN solution

(urea ammonium nitrate)

28 to 32-0-0

NH4NO3 + (NH2)2CO in water

Aqua ammonia

20-0-0

NH3 in water

Ammonium sulfate

21-0-0-24(S)

(NH4)2SO4

P

Triple superphosphate (TSP)

0-44 to 46-0

Ca(H2PO4)2

Diammonium phosphate (DAP)

18-46-0

(NH4)2HPO4

Monoammonium phoshate (MAP)

11-48-0

NH4H2PO4

Ammonium polyphosphate liquid (APP)

10-34-0

NH4H2PO4 + (NH4)3HP2O7

Ammonium polyshosphate dry (APP)

15-62-0

Same as liquid

K

Potassium chloride

(muriate of potash)

0-0-60

KCI

Potassium sulfate

0-0-50-18(S)

K2SO4

Potassium-magnesium sulfate (sul-fo-mag)

0-0-22-22(S)-11(Mg)

K2SO4 • 2MgSO4

Potassium nitrate

13-0-44

KNO3

Soil Testing Conversions

Plow layer (6–7 inches)

  • = parts per million times 2
  • = pounds per acre

Top 12 inches = parts per million times 4 = pounds per acre

Manure Generation and Nutrient Content

Animal

Average Weight of Animal

(lb)

Manure Production

(lb/d/1,000#) (lb/d/1,000#)

Nutrient Content

(cf/d/1,000#)

       

N

P2O5

K2O

Dairy cow

1,200

80.00

1.30

0.45

0.16

0.31

Feeder swine

135

63.40

1.00

0.42

0.36

0.26

Gestation sow

375

27.20

0.44

0.19

0.14

0.14

Lactation sow w/ pigs

475

60.00

0.96

0.47

0.34

0.36

Nursery pig

20

106.00

1.70

0.60

0.57

0.42

Pullet litter

3

10.10

0.29

0.16

0.20

0.18

Breeder litter

8

13.40

0.38

0.21

0.27

0.23

Broiler litter

2

17.80

0.57

0.52

0.43

0.33

 

Nutrient Management Data

Plant Nutrient Removal (lb per acre unit of indicated yield)

 

N

P205

P

K20

K

Corn, 100 bushels grain

90

44

19

27

22

1 ton dry stover

22

8

4

32

26

Silage, ton

10

3.1

1

7

6

Cotton, bale

32

14

6

19

16

Rice, 150 bushels

86

45

20

24

20

Bahiagrass, ton

43

12

5

35

29

Hybrid bermudagrass

50

12

5

43

36

Sweetpotatoes, 100 bushels

24

13

6

56

46

Tall fescue

27

12

5

54

45

Soybeans, 40 bushels

152

34

15

52

43

Grain sorghum, 80 bushels

53

31

14

22

18

Wheat, 50 bushels

65

30

13

17

14

Peanuts, 6 tons

420

66

29

102

85

Dalligrass (5.8 tons/acre)

209

70

30

293

244

Annual ryegrass (4.5 tons/acre)

270

72

32

225

187

Fertilizer Conversion Factors

P2O5 X 0.44 = P

P X 2.29 = P2O5

K2O X 0.83 = K

K X 1.20 = K2O

1 gallon of water = 8.328 pounds

1 gallon of UAN (28%N) = 10.6 pounds

Area/ Volume Conversion Factors

Area

1 acre

  • = 43,560 feet2
  • = 0.405 hectare

1 hectare = 10,000 meters2

1 yard2 = 0.836 meter2

1 chain2

  • = 0.10 acre
  • = 16 rods2

1 mile2 = 640 acres

Volume

1 bushel (level)

  • = 1.244 feet3
  • = 8 gallons (dry)
  • = 9.31 gallons (liquid)
  • = 35.24 liters

1 liter = 1,000 milliliters or centimeters3

1 gallon (liquid)

  • = 3.78 liters
  • = 128 fluid ounces
  • = 4 quarts
  • = 8 pints

1 acre-foot

  • = 43,560 feet3
  • = 1,613 yards3
  • = 325,851 gallons

1 cup

  • = 236.6 centimeters3
  • = 0.236 liters
  • = 8 ounces
  • = 16 tablespoons

Information Sheet 1620 (POD-03-20)

Revised by Larry Oldham, PhD, Extension Professor, Plant and Soil Sciences.

Copyright 2020 by Mississippi State University. All rights reserved. This publication may be copied and distributed without alteration for nonprofit educational purposes provided that credit is given to the Mississippi State University Extension Service.

Produced by Agricultural Communications.

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Extension Service of Mississippi State University, cooperating with U.S. Department of Agriculture. Published in furtherance of Acts of Congress, May 8 and June 30, 1914. GARY B. JACKSON, Director

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Authors

Portrait of Dr. Larry Oldham
Extension Professor
Soil Health, Soil Fertility, Nutrient Management, Soil Conservation and Management, Certified Cr

Your Extension Experts

Portrait of Dr. Larry Oldham
Extension Professor
Soil Health, Soil Fertility, Nutrient Management, Soil Conservation and Management, Certified Cr

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