Soil pH and Nutrient Test Kit. A simple, economical, accurate kit for the home gardener or landscaper. Rapid test procedure and laminated color charts give low/medium/high concentrations for nitrogen, phosphorus and potassium (15 tests each). A pH indicator and color chart cover the range pH 4.0 to 9.0 (30 tests). A garden guide manual and soil handbook interpret test results and give soil and fertilizer recommendations.