The lab provides cost-effective analytical testing and research-based limestone and fertilizer recommendations to support sustainable management decisions.
Soil testing is an important tool for soil fertility evaluation. Soil nutrient bioavailability, deficiencies and toxicities that impact crop growth can be determined by getting the soil tested regularly. We offer three types for services:
- Standard fertility test package for field crops. Includes Mehlich3 potassium, phosphorous (colorimetric), pH and lime. Organic matter and DTPA zinc can be added as additional tests.
- Standard fertility test package for horticultural crops Includes ammonium acetate potassium, Bray1 phosphorous (colorimetric), pH and lime. Organic matter, ammonium acetate extracted magnesium and calcium and DTPA zinc can be added as additional tests.
- Late spring soil nitrate test for corn
Research Soil Samples Testing(Other special Tests). CLIENTS WILL RECEIVE DATA ONLY; NO INTERPRETATIONS OR RECOMMENDATIONS ARE MADE FOR SAMPLES SUBMITTED WITH RESEARCH FORMS.
All forms of liquids (soil extracts, leachates, irrigation and run-off) are analyzed for inorganic elements (including heavy and toxic metals), pH, sodium adsorption ratio and electrical conductivity.
Provides pH of Water Saturated Media, Electrical Conductivity and Nutrient Content (Nitrate-N, Ammonium-N, P, K, Ca, Mg, Zn, B, Mn, Cu, and Fe). This analysis is available under our research services
Calcium carbonate equivalence is reported on a wet/dry matter basis along with the particle size analysis using the wet sieve method.
Plant tissue testing serves as a supplemental tool to soil tests and helps to determine the effectiveness of fertilizer practices. Plant nutrient imbalances, deficiency, toxicity of major and micro-nutrient elements can be diagnosed and corrected early during the growth season. Commonly tested nutrients include nitrogen, phosphorus, potassium, calcium, magnesium, iron, zinc, copper, and boron.
A plant test for the determination of end-of-the-season stalk nitrate concentration for field corn is available. The test is a reliable end-of-season indicator of crop N status.
Customized testing to meet the analytical requirements of the researchers is also available
The "Do-it-yourself" analysis option is available to all ISU students and staff
The lab offers compost testing as proposed by US. Composting Council.
Additionally, we also conduct Saturated Paste analysis employing methods published by USDA-ARS: Handbook No. 60 Diagnosis and Improvement of Saline and Alkali Soils (1964).