It’s vital to know the existing pH level in garden soil. The rapitest pH Soil Tester continues to be a great value for home soil testing. The kit includes all components needed to for (10) tests. The patented color comparator system allows for easy color comparisons versus a typical printed color chart. Extensive, yet simple, instructions are included along with recommendations for over 400 plants. Test results allow the gardener the amend and fertilize appropriately, ensuring the best possible results.