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Useful Nutrient Management Planning Data

Filed Under:
Publication Number: P3968
View as PDF: P3968.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.

Table 1. Weights of crops (per bushel).

Crop

lb/bu

Corn

56

Rye

56

Sorghum

56

Sudangrass

40

Soybeans

60

Potatoes

60

Wheat

60

Sweet potatoes

55

Barley

48

Sunflowers

25

Oats

32

Length Conversion Factors

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 Conversion Factors

1 pound = 454 grams = 0.454 kilograms = 16 ounces

1 ton (short) = 2,000 pounds

1 ton (long) = 2,240 pounds

Speed Conversions

1 mile per hour = 1.467 feet per second = 88 feet per minute = 26.8 meters per hour

Other Conversions

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 liters per hectare

Table 2. Common fertilizer analysis.

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

Table 3. Manure generation and nutrient content.

Animal

Average Weight of Animal

(lb)

Manure Production

(lb/d/1,000#)

Nutrient Content

(cf/d/1,000#)

     

N

P2O5

K2O

Dairy cow

1,200

80.00

0.45

0.16

0.31

Feeder swine

135

63.40

0.42

0.36

0.26

Gestation sow

375

27.20

0.19

0.14

0.14

Lactation sow w/ pigs

475

60.00

0.47

0.34

0.36

Nursery pig

20

106.00

0.60

0.57

0.42

Pullet litter

3

10.10

0.16

0.20

0.18

Breeder litter

8

13.40

0.21

0.27

0.23

Broiler litter

2

17.80

0.52

0.43

0.33

Table 4. Nutrient management data.
 

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

Sweet potatoes, 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

For more information, see MSU Extension Publication 2647 Nutrient Management Guidelines for Agronomic Crops Grown in Mississippi.

Fertilizer Conversion Factors

P2O5 × 0.44 = P
P × 2.29 = P2O5
K2O × 0.83 = K
K × 1.20 = K
2O
1 gallon of water
= 8.328 pounds
1 gallon of UAN (28%N) = 10.6 pounds

Area Conversion Factors

1 acre = 43,560 feet2 = 0.405 hectare
1 hectare = 10,000 meters2
1 yard2 = 0.836 meters2
1 chain2 = 0.10 acre = 16 rods2
1 mile2 = 640 acres

Volume Conversion Factors

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


Publication 3968 (POD-10-23)

Reviewed by Corey Bryant, PhD, Assistant Professor, Delta Research and Extension Center. Previously revised by Larry Oldham, PhD, Extension Professor (retired), Plant and Soil Sciences.

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Authors

Assistant Professor

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