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Soil monitoring system Soil temperature, moisture, ph, NPK online monitoring, can be used for automatic irrigation-Weihai Jingxun Changtong Electronic Technology Co., Ltd.
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SOIL - An underground, wireless, open-source, low-cost system for monitoring oxygen, temperature, and soil moisture
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GroGuru's Wireless Underground IoT for AgTech Solution Enables High Volume Deployment of Soil Sensors in Annual Field Crops
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LOFTWELL Soil Moisture Sensor Meter Tester, Soil Water Monitor, Humidity Plant Tester, Hygrometer Great for Garden, Farm, Lawn, Gardening, Farming, Indoor & Outdoor (No Battery Needed) : Amazon.co.uk: Garden
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