Useful Nutrient Management Planning Data
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.
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