Ground Truth

Discover what your soil and stones can tell you with Ground Truth — a practical field guide for soil testing, rock identification and nature exploration. TEST YOUR SOIL Explore two classic soil tests using simple materials you already have at home. • Ribbon Test: Answer a few picture-based questions to estimate your soil texture in about two minutes. • Jar Test: Mix soil with water, photograph the settling layers and mark sand, silt and clay to calculate their proportions. • USDA Soil Texture Triangle: View your results across all 12 soil texture classes. • Photo Reminders: Get notified when it's time to capture the next settling stage. • Multiple Samples: Track separate jars for different garden beds, plots or fields. IDENTIFY ROCKS AND MINERALS Use the Rock Key to narrow down 25 common rocks and minerals through simple observations and tests. • Examine structure, hardness, streak,…