Measurements

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