Corn Measurements |
Grower Return | Units | $/acre |
Formula | (Weighted price per bushel x yield) - (yield x (handling + hauling + trucking)) -(storage x 0.02) - (yield x (grain moisture-15.5) x drying). |
Determination | Handling cost = $0.02 per bushel
Hauling cost = $0.04 per bushel
Trucking cost = $0.11 $ per bushel (100 miles)
On-farm drying cost = $0.02 per point per bushel
Storage = (yield*0.25 *4) + (yield*0.25*8); On-farm $0.02/bu. 30days Weighted Price per Bushel = $1.86 per bushel = (50% December Average Cash price) + (25% March CBOT Futures price) + (25% July CBOT Futures price). December Average Cash price derived from Wisconsin Ag Statistics; CBOT Futures prices derived from closing price on first business day in December. |
Grain Yield | Units | Bu/acre |
Formula | (43560/(plot width * plot length in feet)) * weight of sample in lbs.* ((100-sample moisture)/(100-15.5{moisture standard}))/56 lb/bu |
Moisture | Units | % |
Determination | GRAIN: determined by Harvest Master unit on combine or wet weight method and adjusted to standard corn moisture 15.5%
WHOLE PLANT: moisture of subsample of chopped whole plant moisture of subsample of chopped stover (whole plant less ears) |
Test Weight | Units | lbs/bushel |
Determination | weight of known volume converted to lbs/bushel |
Plant Height | Units | inches or centimeters |
Determination | plant height from soil surface to top leaf (flag) canopy. |
Observations | average of several plants in each plot |
Ear Height | Units | inches |
Determination | height from soil surface to base of ear |
Observations | average of several plants in each plot |
Broken Stalks | Units | % |
Determination | at harvest |
Observations | number of stalks broken below the ear + number of plants lodged at >45% from the whole plot (22' x 2 rows) |
Formula | (broken stalks + lodged plants)/total stalks x 100% |
Kernel Weight | Units | mg/seed |
Determination | weight of 100 seeds converted to mg/seed |
Plant Density | Units | plants per acre |
Determination | Early = plants at v3-v5 stage
Late = just prior to harvest |
Observations | plants counts on whole plot (22' x 2 rows) |
Ear Density | Units | Ears per acre |
Determination | Just prior to harvest |
Observations taken | Ear counts are taken from whole plot (22' x 2 rows) |
Leaf Development | Units | none |
Determination | count of leaf number |
Observations | LEAF COLLARS: total number of visible leaf collars
HAIL ADJUSTERS: total number of drooping leaves
TOTAL: total number of leaves visible |
Starch (Grain) | Units | % |
Determination | Near Infra-Red Transmittance Spectroscopy using a global calibration equation from Foss |
Observations | Plot subsample |
Protein (Grain) | Units | % |
Determination | Near Infra-Red Transmittance Spectroscopy using a global calibration equation from Foss |
Observations | Plot subsample |
Oil (Grain) | Units | % |
Determination | Near Infra-Red Transmittance Spectroscopy using a global calibration equation from Foss |
Observations | Plot subsample |
Ethanol (Grain) | Units | % |
Determination | Near Infra-Red Transmittance Spectroscopy using a global calibration equation from Pioneer |
Observations | Plot subsample |
Diseases ratings | Units | Rating score = 1-9
1,2,3= Worst; 4,5,6= Mid; 7,8,9= Best |
Determination | Based on amount of disease on plant part of interest |
Observations | Plot measured in the field |
Forage Yield
(Whole Plant) | Units | Tons of dry mater per acre |
Formula | weight of sample in lbs.* (43560/(2000*plot width * plot length in feet)).* ((100-sample moisture)/100) |
Kernel Milk | Units | % |
Determination | percent milk remaining in kernel at harvest |
Observations | visual average of three ears from a non-harvest row |
Kernel Milk Rating (KMR) | Formula | % Kernel Milk x 5 |
Scale | 0-5 |
Stover Moisture Rating (SMR) | Formula | % Greenness x Leaf Rating (Leaf Rating scale 1-5, Based on % of upright leaves) |
Scale | 0-5 |
Visual Moisture Rating (VMR) | Formula | KMR + SMR |
Scale | 0-10 |
Crude Protein (CP) | Units | % |
Determination | wet lab or NIRS procedure on plot sub sample |
Neutral Detergent Fiber | Units | % |
Determination | wet lab or NIRS procedure on plot sub sample |
Neutral Detergent Fiber Digestibility | Units | % |
Determination | wet lab or NIRS procedure on plot sub sample |
Acid Detergent Fiber | Units | % |
Determination | wet lab or NIRS procedure on plot sub sample |
In Vitro Digestibility | Units | % |
Determination | In vitro wet lab or NIRS procedure on plot sub sample |
Starch content | Units | % |
Determination | wet lab or NIRS on plot sub sample |
Kernel Rot | Units | none |
Determination | visual average of 5 plants at V2-V4 |
Scale | 1=deterioration
2=no deterioration |
Emergence | Units | % |
Formula | Early stand / late stand count x 100% |
Residue cover | Units | % |
Determination | Point transects centered on row. |
% Survival | Units | % |
Formula | Early stand / late stand count x 100% |
Root Rating | Determination | The ISU 0 to 3 node-injury root rating scale was used. A rating of 0.50 or below is considered acceptable economic root protection. |
Scale | 0-3 |
Soybean Measurements |
Grower Return | Units | $/acre |
Formula | (Weighted price per bushel x yield) - (yield x (handling + hauling + trucking)) -(storage x 0.02). |
Determination | Handling cost = $0.02 per bushel
Hauling cost = $0.04 per bushel
Trucking cost = $0.11 $ per bushel (100 miles)
Storage = (yield*0.25*4)+ (yield*0.25*8); On-farm $0.02/bu. 30days. Weighted Price per Bushel = $5.54 per bushel = (50% December Average Cash price) + (25% March CBOT Futures price) + (25% July CBOT Futures price). December Average Cash price derived from Wisconsin Ag Statistics; CBOT Futures prices derived from closing price on first business day in December. |
Grain Yield | Units | Bu/acre |
Formula | (43560/(plot width * plot length in feet)) * weight of sample in lbs.* ((100-sample moisture)/(100-13{moisture standard}))/60 lb/bu |
Grain Moisture | Units | % |
Determination | determined by detector on combine 13% is standard soybean moisture |
Plant Height | Units | inches |
Determination | plant height from soil surface to tip of main stem |
Observations | average of several plants in each plot |
Plant Lodging | Units | none |
Determination | based on average erectness of main stem of plant |
Observations | whole plot is assessed |
Scale | 1=ALL PLANTS ERECT
2=SLIGHT LODGING
3=PLANTS LODGED AT 45 DEGREE ANGLE
4=PLANTS LODGED AT 60-80 DEGREE ANGLE |
Seed Weight | Units | seeds/lb |
Determination | weight of 300 seeds converted to seeds/lb |
Plant Density | Units | plants per acre |
Determination | early = plants at V3 to V5 stage
late = just prior to harvest |
Observations | plants counts are taken from 5 linear feet of plot X the harvested area |
% Survival | Units | % |
Formula | Early stand / late stand count x 100% |
Wheat Measurements |
Grower Return | Units | $/acre |
Formula | (Weighted price per bushel x yield) – (yield x (handling + hauling + trucking)) -(storage x 0.02). |
Determination | Handling cost = $0.02 per bushel
Hauling cost = $0.04 per bushel
Trucking cost = $0.11 $ per bushel (100 miles)
Storage = (yield*0.25*4)+ (yield*0.25*8); On-farm $0.02/bu. 30days. Weighted Price per Bushel = $3.07 per bushel = (50% December Average Cash price) + (25% March CBOT Futures price) + (25% July CBOT Futures price). December Average Cash price derived from Wisconsin Ag Statistics; CBOT Futures prices derived from closing price on first business day in December. |
Grain Yield | Units | Bu/acre |
Formula | (43560/(plot width * plot length in feet)) * weight of sample in lbs.* ((100-sample moisture)/(100-13.5{moisture standard}))/60 lb/bu |
Grain Moisture | Units | % |
Determination | Determined by sensor on combine 13.5% is standard wheat moisture |
