Using Grid Soil Sampling wPrecision Ag Technologies Katlynn

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Using Grid Soil Sampling w/Precision Ag Technologies Katlynn Weathers Soil 4213 April 10, 2013

Using Grid Soil Sampling w/Precision Ag Technologies Katlynn Weathers Soil 4213 April 10, 2013

Introduction Ø What is precision agriculture? Ø What makes it so special? Ø How

Introduction Ø What is precision agriculture? Ø What makes it so special? Ø How can grid soil sampling help?

Introduction Ø Purpose of Soil Sampling (Why) • Determine fertilizer and lime needs •

Introduction Ø 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… Ø Previous • • management Significantly altered soil nutrient levels

Consider Grid Sampling If… Ø Previous • • management Significantly altered soil nutrient levels Confined livestock areas Unknown management practices from previous years Desire for more information Ø Smaller fields merged into one

Types of Soil Sampling. . . . Grid . . . Composite / Random

Types of Soil Sampling. . . . Grid . . . Composite / Random . . . . Zone

Sampling On a Grid Field Border Grid Cell 1 2 3 4 5 6

Sampling On a Grid Field Border Grid Cell 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Sample ID #

Sampling w/ In A Grid. Center of Grid . . Sample points W/ in

Sampling w/ In A Grid. Center of Grid . . Sample points W/ in Grid Cell . .

Soil Test Results

Soil Test Results

Soil Test Maps Soil Test P Potassium p. H http: //extension. missouri. edu/p/WQ 450

Soil Test Maps Soil Test P Potassium p. H http: //extension. missouri. edu/p/WQ 450

What Happens Next? ? ? Ø How will you use this information? ? ?

What Happens Next? ? ? Ø How will you use this information? ? ? • Layering Ø Prices in Oklahoma • Flat rate per acre (Central OK) $4. 50 -$5. 50 • VRT per acre (Northern OK) $6. 00 - $8. 00

Advantages ØMore accurate Disadvantages Ø Cost ØLayering of data Ø Time ØNutrients Ø Not

Advantages ØMore accurate Disadvantages Ø Cost ØLayering of data Ø Time ØNutrients Ø Not ØHas the potential to save money and increase yields* Ø Specialized ideal for all locations equipment

Questions? ? ?

Questions? ? ?

Links for more Information 1. University of Missouri Extension http: //extension. missouri. edu/p/WQ 450

Links for more Information 1. University of Missouri Extension http: //extension. missouri. edu/p/WQ 450 2. University of Nebraska Cooperative Extension http: //cropwatch. unl. edu/c/document_library/get_file? fo lder. Id=506359&name=DLFE-12661. pdf 3. West Virgina University Extension Service http: //www. wvu. edu/~agexten/forglvst/Precision_State wide_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/IL 63. pdf