The soil pH test gives a measurement of the soil acidity or alkalinity. Soil pH affects nutrient availability to the plant roots. Some plants like rhodendron and azaleas, many evergreens, some vegetables and container plants need acid soils to grow well. We recommend this to follow up on pH adjustments with sulfur or lime.
The Soluble Salts Test measures the amount of dissolved nutrientsin the soil from deicing salts, swimming pools, fertilizer spills or surface evaporation in arid soils. High levels cause root burn and foliar dieback. A good diagnositic test for roadside soils, container plants and when the pH is very high.
The Particle Size (PSA)/Textural Analysis measures the percentage of sand, silt and clay in your soil. These affect the soil tilth, soil drainage and air exchange. Valuble information for building healthy soils and very useful for diagnosing plant problems.
The Soil Nitrogen Test will determine how much total nitrogen is potentially available for plant root uptake. Test values fluctuate with soil moisture and temperature. Useful for dry climates where rainfall is less than 20 inches per year.