ZP Soil nitrate sensor by Martin Peacock | Sep 14, 2020 | Uncategorized At ZP we are busy testing our nitrate sensors in the soil, in the image ten nitrate sensors are being buried in the soil. Zp AgTech FollowFollowFollow Nitrate Potassium Calcium pH Ammonium Phosphate Wearables Services FoodSense Biosensors Contact Products