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Direct reading soil tester for ph and moisture. Tests soil in 3 minutes. FEATURES. No batteries or chemicals needed. Reliable, accurate, portable. INSTRUCTIONS. The MA-78 Kelway® Soil Tester is designed for quick and accu- rate readings, but its accuracy depends upon proper cleaning. Kelway Products. Kelway Soil Acidity and Moisture Tester Model HB-2. © 2023 by Landsacpe Gardner. Proudly created with Wix.com. Accurate to within a +/- .2 pH in acidic soils. Lasts for years when properly cared for. The PHD is scientific and does not operate on batteries. Use in Kelway pocket size soil tester needs no chemicals - simply insert in soil for instant reading! Push button switch for measuring pH ranges from 3.5 to 8.Accurate readings can be obtained by following instructions and long unit life is insured by proper handling. ll. Brief Theory. The Kelway Soil Acidity Tester,