Biosolids Application Plan: Soil Testing
Soils are monitored after the last crop has been harvested and prior to each biosolids application. The soil testing parameters are in the table below: |
Soil Testing Parameters
|
Nutrients |
Metals* |
| Organic Matter |
Arsenic |
| Nitrate-Nitrogen |
Cadmium |
| Ammonia-Nitrogen |
Chromium |
| pH |
Copper |
| Conductivity |
Lead |
| Available Phosphorus |
Mercury |
| Total Phosphorus |
Molybdenum |
| |
Nickel |
| |
Selenium |
| |
Zinc |
* Total and Available Metals are analyzed
|
|
These application sites, 320-acre maximum size, are designated with Destination Code numbers (DCs). The soil samples are two feet deep and are composites of at least 16 core samples per DC or field(s) therein. Using nutrient loading rate tables in the CSU Guide to Fertilizer Recommendations for the crop to be planted and the results of the soil tests, a nitrogen-loading rate is determined for each DC or field(s) therein. The amount of biosolids is then applied to the site in order to meet this nitrogen-loading rate. |
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