Emerging Sensor Technology for Soil Moisture, Temperature, and EC

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Presentation transcript:

Emerging Sensor Technology for Soil Moisture, Temperature, and EC Speaker: Mike Thurow, Spectrum Technologies, Inc.

The Importance of Water Plant tissue is ~80% water Too much No oxygen in soil Soils susceptible to compaction Reduced microbial activity Movement of nutrients out of root zone Disease susceptibility increases Too little Less transpiration Reduced photosynthesis Reduced nutrient uptake

The Dangers of Soil Salinity Arid regions have the highest risk of salt build-up in the root zone due to: Irrigation with low-quality saline water Insufficient leaching through rainfall Soil salinity indicators: White crust/crystals on dry soil surface Patches of reduced growth or yield in areas Tip burning of leaves, followed by yellowing and bronzing Friable or “puffy” soil structure in low-lying areas when dry Appearance of stunted plants Reduced growth rate Shortened leaves “Comparison Between the Water and Salt Stress Effects on Plant Growth and Development” By Alexandre Bosco de Oliveira, Nara Lídia Mendes Alencar and Enéas Gomes-Filho Puffy soil with salt crust when dry Salt accumulation on the soil surface High salinity patch in wheat field Leaf burn due to high salinity in pecan leaf http://www.intechopen.com/books/responses-of-organisms-to-water-stress/comparison-between-the-water-and-salt-stress-effects-on-plant-growth-and-development

WaterScout SMEC 300 Spectrum’s SMEC 300 sensor collects data on 3 different measurement inputs: Volumetric Water Content (VMC) % Two electrodes function as a capacitor Response signal is proportional to dielectric permittivity which is function of VWC Sensitive to moisture within 3 mm field of influence Temperature Electrical Conductivity (EC) Carbon Ink Electrodes are spaced with maximum surface area between for greater reliability Conductivity increases with higher concentration of salts Cost efficient compared to purchasing multiple sensors Can be used with WatchDog dataloggers or Mini/Weather Station for analysis over time Award Winner

Installation and Applications Easy installation Surface installation Deep installation with PVC pipe One to four sensors should be installed to “bracket” the root zone Good soil to sensor contact is crucial Applications Can serve to warn growers of dangerous situations where soil salinity is an issue for more informed irrigation decisions Can be used as a proxy for nutrients in hydroponics situations and greenhouse soil solutions Can provide relative measurements of total nutrients in mineral soils for better row crop and vegetable crop fertilization timing Can identify where moisture and temperature conditions are conducive to the propagation of soil-borne diseases Stop by Booth # 704 for additional information