← Back to Blog Nitrate testing in the soil October 28, 2020 • Martin Uncategorized Share At ZP we put our sensors through the harshest tests, like burying them at 30, 60 and 90 cm in the ground. Please click the button to find out more. Read more facebooktwitterlinkedin Nitrate Potassium Calcium pH Ammonium Phosphate Wearables Services FoodSense Biosensors Contact Products ← Back to Blog