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Using Grid Soil Sampling w/Precision Ag Technologies. Katlynn Weathers Soil 4213 April 10, 2013. Introduction. What is precision agriculture? What makes it so special? How can grid soil sampling help?. Introduction. Purpose of Soil Sampling (Why) Determine fertilizer and lime needs

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Using grid soil sampling w precision ag technologies

Using Grid Soil Sampling w/Precision Ag Technologies

Katlynn Weathers

Soil 4213

April 10, 2013


Introduction
Introduction

  • What is precision agriculture?

  • What makes it so special?

  • How can grid soil sampling help?


Introduction1
Introduction

  • Purpose of Soil Sampling (Why)

    • Determine fertilizer and lime needs

    • Influence management decisions

      • Too much fertilizer reduced nutrient use efficiency

      • Not enough fertilizer will hurt yields


Consider grid sampling if
Consider Grid Sampling If…

  • Previous management

  • Significantly altered soil nutrient levels

  • Confined livestock areas

  • Unknown management practices from previous years

  • Desire for more information

  • Smaller fields merged into one


Types of soil sampling
Types of Soil Sampling

Grid

Composite / Random

Zone


Sampling on a grid
Sampling On a Grid

Grid Cell

Field Border

Sample ID #


Sampling w in a grid
Sampling w/ In A Grid

Center of Grid

Center of Grid

Sample

points

W/ in Grid

Cell



Soil test maps
Soil Test Maps

pH

Soil Test P

Potassium

http://extension.missouri.edu/p/WQ450


What happens next
What Happens Next???

  • How will you use this information???

    • Layering

  • Prices in Oklahoma

    • Flat rate per acre (Central OK) $4.50 -$5.50

    • VRT per acre (Northern OK) $6.00 - $8.00


Using grid soil sampling w precision ag technologies

  • Disadvantages

    • Cost

    • Time

    • Not ideal for all locations

    • Specialized equipment

Advantages

  • More accurate

  • Layering of data

  • Nutrients

  • Has the potential to save money and increase yields*



Links for more information
Links for more Information

1. University of Missouri Extension

http://extension.missouri.edu/p/WQ450

2. University of Nebraska Cooperative Extension

http://cropwatch.unl.edu/c/document_library/get_file?folderId=506359&name=DLFE-12661.pdf

3. West Virgina University Extension Service

http://www.wvu.edu/~agexten/forglvst/Precision_Statewide_Project.pdf

4. University of Nebraska-Lincoln http://cropwatch.unl.edu/web/ssm/soilsampling

5. Clemson Extension http://virtual.clemson.edu/groups/psapublishing/Pages/AGRO/IL63.pdf