STH Series Soil Testing Outfits

Colorimetric test methods are used for most test factors. Tests for calcium, sulfate and chlorides are based on turbidity measurements. Potassium analysis also employs a turbidity measurement, using a unique reading device to read directly in pounds per acre.

A single extraction procedure, using Morgan Universal Extraction Solution, provides the liquid soil extract for all the nutrient tests with the exception of chloride, which is extracted with demineralized water.

Each kit includes complete instructions, a soil management handbook and a pad of soil analysis report forms.

Four combination outfits are available in the STH series - STH-4, STH-5, STH-7 and STH-14, differing in the number of parameters tested.

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Specifications

Model STH-4	Model STH-5	Model STH-7	Model STH-14
pH pH 3.8-9.6 100 Tests	pH pH 3.8-9.6 100 Tests	pH pH 3.8-9.6 100 Tests	pH pH 3.8-9.6 100 Tests
Nitrate Nitrogen 10-150 lbs/acre 50 Tests	Nitrate Nitrogen 10-150 lbs/acre 50 Tests	Nitrate Nitrogen 10-150 lbs/acre 50 Tests	Nitrate Nitrogen 10-150 lbs/acre 50 Tests
Phosphorus** 100-400 lbs/acre 50 Tests	Phosphorus** 100-400 lbs/acre 50 Tests	Phosphorus** 100-400 lbs/acre 50 Tests	Phosphorus** 100-400 lbs/acre 50 Tests
Potassium 100-400 lbs/acre 50 Tests	Potassium 100-400 lbs/acre 50 Tests	Potassium 100-400 lbs/acre 50 Tests	Potassium 100-400 lbs/acre 50 Tests
	Humus (Organic Matter) L-H 1.5%-8% 50 Tests	Humus (Organic Matter) L-H 1.5%-8% 50 Tests	Humus (Organic Matter) L-H 1.5%-8% 50 Tests
		Calcium 150-2800 ppm 50 Tests	Calcium 150-2800 ppm 50 Tests
		Magnesium L-H 5-150 ppm 50 Tests	Magnesium L-H 5-150 ppm 50 Tests
			Aluminum L-H 5-125 ppm 50 Tests
			Nitrite Nitrogen 1-50 ppm 50 Tests
			Sulfate 50-2000 ppm 50 Tests
			Chloride 25-500 ppm 50 Tests
			Ferric Iron 5-125 lbs/acre 50 Tests