Soil Sampling

Soil Sampling is an important part of the field nutrient application program.  If you don't know what you have, you won't know what nutrients to apply.  Some operators take random samples on each field and other operators take a grid sample in a systematic manner to let them know what nutrients are available in each area of the field.

If the results of the grid soil samples are loaded in a computer, this can be used for determining commercial application of fertilizer if the applicator has a similar GPS program in their tractors.

For manure and effluent application purposes, one only needs to take 15 random samples in each field. These samples are put in a ziplock bag and mixed to give an average for the whole field.  These samples are sent to a certified lab for analysis.  

After the soil samples are taken, a sample of the lagoon solids and water needs to be taken so one can determine the amount of nutrients in the effluent.

From the lab analysis of the soil and lagoon effluent we can determine the proper agronomic rate for the crops intended to be planted.

Agronomic Land Application of Manure
Soil Sampling is an important part of the determining the Agronomic Application rates for manure slurries. This article is a must read.
Agronomic Application Rate.pdf
Adobe Acrobat document [329.1 KB]
Soil Test Interpretation Guide
Adobe Acrobat document [1.8 MB]
Soil Sampling Guide
Here is the official soil sampling guide from Midwest Labs out of Omaha, NE.
Adobe Acrobat document [84.9 KB]
Soil Sample Procedures
This is the expectation of Midwest Labs for any soil samples sent to them for analysis. Midwest Labs are a cost effective and reliable source for both soil and manure slurry sample results. We use them all the time.
Adobe Acrobat document [197.0 KB]

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