N-TRACKER Plus is based upon multiple sampling dates from harvest to tassel emergence.  Samples collected are submitted to a laboratory where selected tests are performed.  The depth of sample collection and the type of tests performed will vary according to the time of sample collection.  Below is a description of differences between the first sampling date and following sampling dates.

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FIRST SAMPLING DATE

FOLLOWING SAMPLING DATES

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SAMPLING DEPTH
0 - 7 Inches
0 - 12 Inches
12 - 24 Inches

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SAMPLING DEPTH
0 - 12 Inches
12 - 24 Inches

TESTS PERFORMED

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TESTS PERFORMED

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​​Nitrate-N
Ammonium-N
Sulfur
​Boron
Soil Organic Matter 
pH
Phosphorus
Potassium

​pH
​Buffer pH
Calcium
Magnesium
Cation Exchange Capacity
Base Saturation
Zinc
​Manganese

Same as First Sampling Date