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Tables for Weights and Measurement: Crops
William J. MurphyDepartment of Agronomy
These tables give weights per bushel, weights of grain by volume, moisture conversion and planting rates.
Table 1 Weights per bushel
- Alfalfa 60 pounds per bushel
- Barley 48 pounds per bushel
- Clover, Alsike 60 pounds per bushel
- Clover, Crimson 60 pounds per bushel
- Clover, Ladino 60 pounds per bushel
- Clover, White 60 pounds per bushel
- Clover, Red 60 pounds per bushel
- Clover Sweet 60 pounds per bushel
- Corn, shelled 56 pounds per bushel
- Corn, ear 70 pounds per bushel
- Cotton 32 pounds per bushel
- Cowpeas 60 pounds per bushel
- Flax 60 pounds per bushel
- Grass, Brome (smooth) 14 pounds per bushel
- Grass, Blue 14 pounds per bushel
- Grass, Fescue (tall) 14 pounds per bushel
- Grass, Orchard 14 pounds per bushel
- Grass, Redtop 14 pounds per bushel
- Grass, Timothy 45 pounds per bushel
- Lespedeza 40 to 50 pounds per bushel
- Millet 50 pounds per bushel
- Oats 32 pounds per bushel
- Rape 60 pounds per bushel
- Rye 56 pounds per bushel
- Sorghum, forage 50 pounds per bushel
- Sorghum, grain 56 pounds per bushel
- Soybeans 60 pounds per bushel
- Sudan grass 28 pounds per bushel
- Sunflower (oil type) 24-32 pounds per bushel
- Trefoil, Birdsfoot 60 pounds per bushel
- Vetch 60 pounds per bushel
- Wheat 60 pounds per bushel
Table 2 Calculating approximate weight of grain by volume
Standard bushel weight Pounds per cubic feet 60 pounds 48. 56 pounds 44. 50 pounds 40. 48 pounds 38. 45 pounds 36. 28 pounds 22.
13.5 percent 66.42 pounds 54.70 pounds 14 percent 66.89 pounds 55.02 pounds 14.5 percent 67.39 pounds 55.34 pounds 15 percent 67.89 pounds 55.67 pounds 15.5 percent 68.40 pounds 56.00 pounds 16 percent 68.94 pounds 56.33 pounds 16.5 percent 69.51 pounds 56.67 pounds 17 percent 70.09 pounds 57.01 pounds 17.5 percent 70.69 pounds 57.35 pounds 18 percent 71.31 pounds 57.70 pounds 18.5 percent 71.95 pounds 58.06 pounds 19 percent 72.60 pounds 58.41 pounds 19.5 percent 73.27 pounds 58.78 pounds 20 percent 73.96 pounds 59.15 pounds 20.5 percent 74.60 pounds 59.52 pounds 21 percent 75.36 pounds 59.89 pounds 21.5 percent 76.07 pounds 60.28 pounds 22 percent 76.79 pounds 60.66 pounds 22.5 percent 77.53 pounds 61.05 pounds 23 percent 78.25 pounds 61.45 pounds 23.5 percent 79.01 pounds 61.85 pounds 24 percent 79.76 pounds 62.26 pounds 24.5 percent 80.50 pounds 62.67 pounds 25 percent 81.25 pounds 63.09 pounds 25.5 percent 82.03 pounds 63.51 pounds 26 percent 82.82 pounds 63.94 pounds 26.5 percent 83.50 pounds 64.38 pounds 27 percent 84.19 pounds 64.82 pounds
27.5 percent 84.90 pounds 65.26 pounds 28 percent 85.62 pounds 65.72 pounds 28.5 percent 86.32 pounds 66.18 pounds 29 percent 87.04 pounds 66.64 pounds 29.5 percent 87.76 pounds 67.12 pounds 30 percent 88.50 pounds 67.60 pounds 30.5 percent 89.22 pounds 68.08 pounds 31 percent 89.94 pounds 68.57 pounds 31.5 percent 90.67 pounds 69.08 pounds 32 percent 91.43 pounds 69.58 pounds 32.5 percent 92.13 pounds 70.10 pounds 33 percent 92.85 pounds 70.62 pounds 33.5 percent 93.55 pounds 71.15 pounds 34 percent 94.28 pounds 71.69 pounds 34.5 percent 94.98 pounds 72.24 pounds 35 percent 95.71 pounds 72.80 pounds
(^1) Ear corn values supplied by Dr. Marcus Zuber, University of Missouri Agronomy Department. Ear corn values apply with greatest accuracy at harvest because differences in cob and grain moisture will change in storage. Shelled corn figures apply at any time.
Obtaining bushels of grain
Divide total grain weight by appropriate standard bushel weight.
Obtaining number of hundredweights (cwts) of grain
Divide total grain weight by 100.
Table 4 Moisture conversion for soybeans
Moisture in grain Soybeans equivalent to 60 pounds of Soybeans at 13.0 percent Moisture 10 percent 58.00 pounds
13.5 percent 60.00 pounds 14 percent 60.35 pounds 15 percent 61.06 pounds 16 percent 61.79 pounds 17 percent 62.53 pounds 18 percent 63.29 pounds 19 percent 64.07 pounds 20 percent 64.88 pounds 21 percent 65.70 pounds 22 percent 66.54 pounds 23 percent 67.40 pounds 24 percent 68.29 pounds 25 percent 69.20 pounds 26 percent 70.14 pounds 27 percent 71.10 pounds 28 percent 72.08 pounds 29 percent 73.10 pounds 30 percent 74.14 pounds
Table 6 Moisture conversion for grain sorghum
Percent moisture in grain
Grain sorghum equivalent to 56 pounds of grain sorghum at 13 percent moisture 10 percent 54.13 pounds 11 percent 54.74 pounds 12 percent 55.36 pounds 13 percent 56.00 pounds 14 percent 56.65 pounds 15 percent 57.32 pounds
16 percent 58.00 pounds 17 percent 58.70 pounds 18 percent 59.41 pounds 19 percent 60.15 pounds 20 percent 60.90 pounds 21 percent 61.67 pounds 22 percent 62.46 pounds 23 percent 63.27 pounds 24 percent 64.11 pounds 25 percent 64.96 pounds 26 percent 65.83 pounds 27 percent 66.74 pounds 28 percent 67.67 pounds 29 percent 68.62 pounds 30 percent 69.60 pounds
Calculating other conversion factors
These conversion tables cover the most widely grown crops and the most common moisture contents. When you need other conversions, the calculations are relatively simple.
Use percent dry matter in making conversions because the problem is to obtain the same weight of dry matter as is found in a standard bushel. For example, a standard bushel of wheat contains 60 pounds at 13.5 percent moisture. Thus, 86.5 percent dry matter (100-13.5) x 60 pounds = 51.9 pounds of dry matter.
Example How many pounds of 20.5 percent moisture wheat is equivalent to a standard bushel?
13.5 percent Standard Moisture Content = 100 - 13.5 = 86.5 percent Dry Matter
20.5 percent Moisture Content = 100 - 20.5 = 79.5 percent Dry Matter
86.5 ÷ 79.5 = 108.8 percent
(108.8 x Standard Bu. Wt. (60 for Wheat)) ÷ 100 = 65.28 pounds equivalent to a standard bushel
- 1 pound = 0.454 kilograms
- 1 kilogram = 2.205 pounds
- 1 pound = 0.00454 quintals
- 1 quintal = 220.5 pounds
- 1 ton = 0.9072 metric tons
- 1 metric ton = 1.102 tons
Yield or rate
- 1 pound per acre = 1.121 kilograms per hectare
- 1 kilogram per hectare = 0.892 pounds per acre
- 1 ton per acre = 2.242 tons per hectare
- 1 ton per hectare = 0.446 tons per acre
- 1 bushel per acre = 1.121 quintals per hectare
- 1 quintal per hectare = 0.892 bushel per acre
- 1 bushel per acre (60#) = 0.6726 quintals per hectare
- 1 quintal per hectare = 1.487 (60#) 1 bushel per acre (56#) = 0.6278 quintals per hectare
- 1 quintal per hectare = 1.597 (56#)
Temperature
- To convert Fahrenheit (F) to Celsius (C): 0.555 x (F - 32)
- To convert Celsius to Fahrenheit: 1.8 x (C + 32)
Table 9 Mixing small quantities of liquid spray. The first column represents concentration of active ingredient per gallon; the second column provides corresponding amount to mix for 1,000 square feet to get 1 pound per acre of active ingredient
Concentration of active ingredient per gallon
Amount to mix for 1000 square feet to get 1 pound per acre of active ingredient 1 pound 7 tablespoons or 103 milliliters 2 pounds 3.5 tablespoons or 51.5 milliliters 3 pounds 2.3 tablespoons or 34.3 milliliters 4 pounds 1.7 tablespoons or 25.8 milliliters
Checking planting rate or stand per acre
This table may be useful in checking actual planting rate when planting a crop. It can also be used in obtaining stand counts.
Determine average spacing in inches between seeds (or plants) in the row. Then divide the appropriate figure in the right hand column by this figure to determine planting rate (or stand).
Example Grain sorghum planted in 30-inch rows is found to average 2.5 inches between seeds.
209,088 ÷ 2.5 = 83,635 seeds being planted per acre.
Or the grain sorghum stand averages 1 plant per 3.5 inches of row. Then 209,088 ÷ 3.5 = 59, plants per acre.
You can use this method without the table as long as you remember that there are 43,560 square feet per acre and that 144 square inches = 1 square foot.
43,560 x 144 = 6,272,630 square inches per acre.
Divide 6,272,640 by inches of row width to obtain inches of row per acre (6,272,640 ÷ 30 = 209,088).
Row spacing Inches of row per acre 40 inches 155, 38 inches 165, 36 inches 174, 30 inches 209, 28 inches 224, 24 inches 261, 20 inches 313, 18 inches 348, 15 inches 418, 14 inches 448, 12 inches 522, 10 inches 627, 8 inches 784, 7 inches 896,
