Grid Soil SamplingGrid Soil Sampling

Cody ClaflinCody ClaflinSoil 4213Soil 4213

ObjectivesObjectives Common practices and methods of soil Common practices and methods of soil

collectioncollection

Benefits and DisadvantagesBenefits and Disadvantages

How grid sampling works.How grid sampling works.

ConclusionConclusion

PracticesPractices CompositeComposite

Zone Zone

GridGrid

Methods Methods HandHand

MechanicalMechanical

http://www.youtube.com/watch?v=e0yZ8pdZDvYhttp://www.youtube.com/watch?v=e0yZ8pdZDvY

http://www.youtube.com/watch?v=vsALxsO5efYhttp://www.youtube.com/watch?v=vsALxsO5efY

Purposes of Soil SamplingPurposes of Soil Sampling1.1. Measure the nutrient content or Measure the nutrient content or

availability of the soilavailability of the soil2.2. Identify nutrient deficienciesIdentify nutrient deficiencies3.3. Predict crop response to added Predict crop response to added

nutrientsnutrients4.4. Build a nutrient management planBuild a nutrient management planH. Zhang 2009H. Zhang 2009

AdvantagesAdvantages More accurate than a composite.More accurate than a composite.

Allows layering of dataAllows layering of data

Allocates nutrients where they are needed mostAllocates nutrients where they are needed most

Save money and increase yield*Save money and increase yield*

DisadvantagesDisadvantages Can be cost prohibitive*Can be cost prohibitive*

Not ideal for all situationsNot ideal for all situations

Time consumingTime consuming

Needs specialized equipmentNeeds specialized equipment

The GridThe Grid Setting up a field Setting up a field

boundaryboundary

From here a geo From here a geo referenced grid can be referenced grid can be designed.designed.

Soil can be collected in Soil can be collected in a point or composite of a point or composite of the grid area.the grid area.

How it all worksHow it all works Soil Test LabsSoil Test Labs

ResultsResults

Cont.Cont. Interpolation Interpolation

Recs + ResultsRecs + Results

The ResultsThe Results

DifferencesDifferences

ConclusionConclusion Any sampling is better Any sampling is better

than none at all.than none at all.

Choose the method that Choose the method that returns the most profit.returns the most profit.

Questions?Questions?