Instructions for Use: How to Analyze Soil Fertility 1. First Remove the Topsoil about 5cm; Then Mash the Soil down to 13cm Deep. and Clean up All Organic Impurities in the Soil That Will Affect the Test Results, Such as Leaves, Root Systems, Etc. 2. Soak the Soil with Water into Mud. (It Is Better to Use Rainwater Or Distilled Water).3. Wipe the Probe with Cleaning Cotton Or Paper Towel. 4. Dial Function Key to the First One Gear from Left. 5. Insert the Probe into the Tested Soil until the Distance between the Soil and the Fuselage Does Not Exceed 2.5cm. Wait up to 10 Seconds to Read Data after the Pointer Is Stable. 6. Record Data. Remove the Probe from the Soil and Clean It Thoroughly. The Judgment Criteria of the Analysis Results Are as Follows: Lack of Nitrogen Less than 50 Ppm Phosphorus Less than 4 Ppm Potassium Less than 50 Ppm Ideal Range (Ideal) 50-200 Ppm4-14 Ppm50-200 Ppm Excess (Too Much) greater than 200 Ppm Greater than 14 Ppm Greater than 200 Ppm · Unit Ppm: Parts Per Million If the Analysis Result Shows "Too Little" Means: for Lack, Please Use Liquid Fertilizer to Supplement Nutrients for Different Plants You Plant. (For More Information, See the Instructions on the Fertilizer Packaging Bag) If the Analysis Results Show "Ideal" Meaning: Ideally, According to the Different Plants You Plant, Use Fertilizer and Apply It Once a Month in Combination with Irrigation. If the Analysis Result Shows "Too Much", It Means: Excess 1. Water a Lot, Dilute and Rinse Excess Nutrients; 2. for Potted Plants, They Should Be Retransplanted into New Soil; 3. Do Not Apply Any Fertilizer, but You Can Add Manure, Compost, Plant Residues, Leaves and Other Organic Substances to the Soil. How to Analyze the PH Value of Soil 1. First Remove the Soil Surface to Be Tested about 5cm; Then Mash the Soil down to 13cm Deep. and Clean up All Organic Impurities in the Soil That Will Affect the Test Results, Such as Leaves, Root Systems, Etc. 2. Soak the Soil with Water into Mud. (It Is Better to Use Rainwater Or Distilled Water) 3. Dial Function Key to the Rightmost Gear. 4. Moist Probe. Wipe the Rightmost One of the Three Cleaning Cotton Probes with One Pieces. 5. Insert the Probe into the Tested Soil Completely. 6. Wait 1 Minute to Read Data. 7. After the Test, Clean the Probe and Dry It. Special Tips: Do Not Insert the Probe into the Soil for a Long Time, and Do Not Use This Device to Test the Liquid, So as Not to Cause Damage to It.