SOIL TESTERS
	697-A All Purpose Soil Tester Important Features: Permanent color standards, guaranteed never to fade, results always accurate. All reagents stable for minimum one year. Tester ready for immediate use. Accurate results - uses proven scientific methods and latest findings in plant nutrition and soil science. Portable, rugged, water resistant carrying case, measuring 24W x 10D x 8H inches, weighs 16 lbs. Soil Tests Performed: Phosphorus Potassium Soil Reaction (pH) Calcium Magnesium Chlorides Nitrates Ammonia Active Aluminum Sulfates Nitrite Nitrogen Manganese Plant Tissue Tests Ferric Iron Humus (Organic Matter)	Model 694 Hellige-Truog Soil pH Tester The most accurate inexpensive outfit for testing pH of any soil, sand, clay or peat. Does 200 tests. Triplex indicator solution produces distinct shades of color over all ranges of the pH scale. Eliminates errors by use of an inert white powder to draw the reagent from soil to its surface for comparison. Accurate color comparisons with laminated color chart supplied.