The Glory of the farmer is that, in the division of labors, it’s his part to create. Emerson Help...

The Glory of the farmer is that, in the division of labors, it’s his part to create.

Emerson

Help farmers make some money, and they will share it with you.

Ellsworth Fanning

1 2

Soil Sampling the old fashioned

way

1 2

VL

VH

Medium

H

L

Too Sweet is as bad as too sour

UNDER

UN

DE

R

UNDER

OVER OVE

R

OVER U

ND

ER

OVER is as bad as UNDER

Blanket Rate

Cotton Yield

As pH increased, Cotton Yield decreased

873 – 1082 1083-1194 1195 –1303 1304 – 1421 1422 - 1656

7.6

6.0

6.8

As the pH increased, Yield decreased

Yie

ld (

lbs/

A)

pH

50

60

70

80

90

100

110

120

1301 2 3 4 5 6 7 8 9

6

6.1

6.2

6.3

6.4

6.5

6.6

6.7

6.8

pH

Yield (lbs/A)

Soil pH Zn (ppm)

4.0 412

5.0 4.12

6.0 0.0412

7.0 0.00041

8.0 0.000004

Nutrient availability is pH dependent

5.0 7.5

Mn DeficientMn Toxicity

K Surface Map

404

163

K - Mg Antagonism

Too High K is as detrimental as Too Low K

K – Mg antagonism

% Potassium

% Magnesium

Too Much is as bad as Too Little

High

Low

Too Much P is as bad as Too Little P

P- Zn antagonism

Too Much P is as bad as Too Little P

Cotton

Cotton Yield Map

500 to 1300 lbs/A

You will never be able to eliminate all variability.

You just should manage it as good as you can with the existing technology

Sampling every

2.5 acres

Grid Samplin

g

Larinburg, NC

May 2006

Creating Management

zones by using electrical

conductivity

One pair of coulter-electrodes injects electrical current into the soil, while two other pairs of coulter-electrodes measure the voltage drop.

Two Depth Readings

Shallow 0-12”

Deep0-36”

Electrical Conductivity

How it works…

• Veris travels at regular intervals throughout a field.

• Data is then used to create a Management Zone map.

• Soil Sampling Sites can be placed according to variability.

Veris Machine

Larinburg, NC

May 2006

0 to 12”

Larinburg, NC

May 2006

0 to 36”

Shallow

Deep

Top soil and sub-soil may be somewhat different

Shallow

Deep

Top soil and sub-soil are similar

3 Zones

5 Zones

Larinburg, NC

May 2006

0 to 12”

Yazoo City

4/10/06

EC Map

Vari-Soil

Yazoo City

4/10/06

Vari-Soil

Yazoo City

4/10/06

You can go beyond

VRT

Soil pH

Soil pH

YieldYield

Negative Correlation

Take Home Message

1500 - 2000

NONE

2000 - 3000

500 - 1500

3000 - 5000

Ag Lime

Take the

money from here

Put that money here

It’s all about prioritizing resources

Soil Types

Vari-SoilYield Maps

EC Maps

Organic Matter

NDVI

Green Seeker

Variable Rate N is going to be big

Imagery

Experience

Cotton

Take a little N off

herePut it here

His Legacy is Land. May he find it as beautiful and bountiful as his forefathers did.

““Life is like a dog sled team. Life is like a dog sled team.

If you ain’t the If you ain’t the lead doglead dog, , the scenery never changes.the scenery never changes.”” Lewis GrizzardLewis Grizzard