Neudorff The pH Soil Test Application Pack of 16 (2X8TESTS) is one of the steps of soil improvement walk, as knowledge of limestone is very important if necessary. This lime flash tube neutralises basic acids creates everything you need for a steady shelf life. The low acid-base response (pH 7) to promote sales in the base and thus improve plant nutrition. An excess of calcium but it can also reduce the availability of phosphate and trace elements for plants.