Useful Tables: Adjustments and Conversions on Corn and Soybean Parameters

AGF-502

Agriculture and Natural Resources

Date:

12/21/2018

Alexander J. Lindsey, Assistant Professor, Agronomy and Crop, Department of Horticulture and Crop Science

Chris Zoller, Associate Professor and Extension Educator, Agriculture and Natural Resources, Tuscarawas County

Expected Corn Yield Due to Various Planting Dates and Harvest Population Rates*

Planting Date	Plants per Acre at Harvest
Planting Date	10,000	15,000	20,000	25,000	30,000	35,000
Apr 10	62	76	86	92	94	93
Apr 20	67	81	91	97	99	97
Apr 30	68	82	92	98	100	98
May 9	65	79	89	95	97	96
May 19	59	73	84	89	91	89
May 29	49	63	73	79	81	79
*Yields are expressed as a % of optimum planting date and population yield.

Seed Spacings to Achieve Various Corn Plant Populations

	Inches between Kernels				*Final Pop.**
Seeds/acre	15" row	20" row	30" row	40" row	*Final Pop.**
15,000	27.9	20.9	13.9	10.5	13,500
16,000	26.1	19.6	13.1	9.8	14,400
17,000	24.6	18.4	12.3	9.2	15,300
18,000	23.2	17.4	11.6	8.7	16,200
19,000	22.0	16.5	11.0	8.3	17,100
20,000	20.9	15.7	10.5	7.8	18,000
22,000	19.0	14.3	9.5	7.1	19,800
24,000	17.4	13.1	8.7	6.5	21,600
26,000	16.1	12.1	8.1	6.0	23,400
28,000	14.9	11.2	7.5	5.6	25,200
30,000	13.9	10.4	7.0	5.2	27,000
32,000	13.1	9.8	6.6	4.9	28,800
34,000	12.3	9.2	6.1	4.6	30,600
36,000	11.6	8.7	5.8	4.4	32,400
40,000	10.4	7.9	5.2	3.9	36,000
*Assuming 10% stand loss

Corn Moisture Corrections

Pounds Needed to Equal One Bushel of No. 2 Corn
Percent Moisture	Shell Corn	Ear Corn	Percent Moisture	Shell Corn	Ear Corn
10.0	52.58	63.49	23.5	61.86	79.01
11.0	53.17	64.25	24.0	62.26	79.76
12.0	53.77	65.06	24.5	62.68	80.50
12.5	54.08	65.50	25.0	63.09	81.25
13.0	54.39	65.95	25.5	63.52	82.03
13.5	54.71	66.42	26.0	63.95	82.82
14.0	55.02	66.89	26.5	64.38	83.50
14.5	55.35	67.39	27.0	64.82	84.19
15.0	55.67	67.89	27.5	65.27	84.90
15.5	56.00	68.40	28.0	65.72	85.62
16.0	56.33	68.94	28.5	66.18	86.32
16.5	56.67	69.51	29.0	66.65	87.04
17.0	57.01	70.09	29.5	67.12	87.76
17.5	57.36	70.69	30.0	67.60	88.50
18.0	57.71	71.31	31.0	68.58	89.94
18.5	58.06	71.95	32.0	69.59	91.43
19.0	58.42	72.60	33.0	70.63	92.85
19.5	58.78	73.27	34.0	71.70	94.28
20.0	59.15	73.96	35.0	72.80	95.71
20.5	59.52	74.60	36.0	73.94	97.17
21.0	59.90	75.36	37.0	75.11	98.64
21.5	60.28	76.07	38.0	76.32	100.13
22.0	60.67	76.79	39.0	77.57	101.63
22.5	61.06	77.53	40.0	78.87	103.16
23.0	61.45	78.25
lbs dry corn = [(100% – wet%) / (100% – dry%)] x lbs. of wet grain Example: Convert 10,000 lbs. of 25% moisture corn to 15.5% moisture: [(100% – 25%) / (100% – 15.5%) x 10,000 lbs.] = (75 / 84.5% x 10,000 = 0.888 x 10,000 = 8,880 lbs. @ 15.5%

USDA Grade Requirements for Shelled Corn

		Maximum Limits of Damaged Kernels
Grade	Min. Test Weight/Bushel	Cracked Foreign Material*	Total	Heat
	(lb)	(%)
1	56	2	3	.1
2	54	3	5	.2
3	52	4	7	.5
4	49	5	10	1.0
5	46	7	15	3.0

Sample grade shall include corn of the class Yellow Corn, White Corn, or Mixed Corn, which does not come within the requirements of any of the grades from No. 1 to No. 5, inclusive; or which contains stones and/or cinders; or which is musty, sour, or heating; or which has a commercially object quality.
*Broken corn, foreign material, and other grains.

Soybean Moisture Conversions

% Moisture	Pounds per Bu	% Moisture	Pounds per Bu
7.0	56.13	14.0	60.70
7.5	56.43	14.5	61.05
8.0	56.74	15.0	61.41
8.5	57.05	15.5	61.77
9.0	57.36	16.0	62.14
9.5	57.68	16.5	62.51
10.0	58.00	17.0	62.89
10.5	58.32	17.5	63.27
11.0	58.65	18.0	63.66
11.5	58.98	18.5	64.05
12.0	59.32	19.0	64.44
12.5	59.66	19.5	64.84
13.0	60.00	20.0	65.25
lbs dry = [(100% – wet%) / (100% – dry%)] x lbs of wet grain Example: Convert 3,000 lbs of 18% moisture beans to 13.0% moisture: [(100% – 18%) / (100% – 13%)] x 3,000 lbs = 82 / 87 x 3,000 lbs = 0.942 x 3,000 lbs = 2827.5 lbs @ 13%.

Length of Row Equal to 1/1,000th Acre

Row Width	Length of Single Row to Equal 1,1000th of an Acre
Inches	Feet	Inches
7.5	69	8
10	52	3
15	34	10
20	26	2
28	18	8
30	17	5
40	13	1

Atomic Weight of Nutrients

Element		Atomic Weight
N	Nitrogen	14.01
P	Phosphorus	30.98
K	Potassium	39.10
Ca	Calcium	40.08
Mg	Magnesium	24.31
S	Sulfur	32.06
Cu	Copper	63.54
Fe	Iron	55.85
Mn	Manganese	54.94
Zn	Zinc	65.37
B	Boron	10.82
Cl	Chlorine	35.46
Mo	Molybdenum	95.94
O	Oxygen	16.00
C	Carbon	12.01
H	Hydrogen	1.01
Water = H₂O= 2 x 1.01 + 16.0 = 18.02

Micronutrient Sources

ZINC MATERIALS	PERCENTAGE:
Zinc Sulfate (hydrated)	22-36
Zinc Sulfate (basic)	55
Zinc Oxide	50–80
Zinc Chelates	6–14
Ammoniated Zinc Complexes	10
Organic Zinc Complexes	5–12
MANGANESE MATERIALS
Manganese Sulfate	26–28
Manganese Chloride	17
Manganese Chelate	12
Manganese Carbonate	31
Manganese Oxide	63
Manganous Oxide	41-68
Manganese Frits	10–25
IRON MATERIALS
Ferrous Sulfate	19–21
Ferrous Ammonium Sulfate	14
Iron Chelates	6-12
BORON MATERIALS
Borax	11
Boron Frits	2-11
Boric Acid	17
Sodium Tetraborate	14-15
Sodium Pentaborate	18
Solubor	20-21
COPPER MATERIALS
Copper Sulfate or Copper Sulfate Monohydrate	25-35
Cupric Oxide	75
Cuprous Oxide	89
Copper Chelate EDTA	13
Copper Acetate	32
Copper Ammonium Phosphate	32
Manure/Biosolids	<0.43
MOLYBDENUM MATERIALS
Ammonium Molybdate	54
Sodium Molybdate	39
Molybdenum Trioxide	66