14 Articles found
Acclima, Inc. Articles
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Evaluation of a Direct-Coupled TDR for Determination of 1 Soil Water Content and Bulk Electrical Conductivity
Signal degradation in coaxial cables and interconnects is a long-standing problem in the practical deployment of time domain reflectometry (TDR) for soil water monitoring. Acclima, Inc. has recently commercialized a TDR sensor (TDR-315) with all ...
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The Accurate Way to Soil Moisture Sensing
Why Acclima soil moisture sensor technology is superior in terms of accuracy and cost Permittivity is a property of matter and is well characterized especially for materials that are electrically non-conductive. Water in its pure form is ...
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Soil Water Sensors for Agriculture – Theory and Issues
Soil water sensors have been used for irrigation and water management in agriculture for many years, but with limited success in many cases. Nonetheless, the use of soil water sensors in increasing as water scarcity increases and, conversely, ...
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Evaluation of a Direct-Coupled TDR for Determination of Soil Water Content and Bulk Electrical Conductivity
Introduction Signal degradation in coaxial cables and interconnects is a long-standing problem in the practical deployment and calibration of time domain reflectometry (TDR) for soil water content monitoring. Acclima, Inc.1 has recently ...
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Soil moisture sensors provide a Dramatic reduction in Irrigation water usage - Case study
Back in late 2012 a property management firm in central California realized they had a big, expensive problem. The manager had a property that was using a lot of irrigation water to keep it looking lush and green. Having the property lush and green ...
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Two Approaches for Optimizing Water Productivity
Agricultural Research Service researchers in Bushland, Texas, are helping farmers make the most of their water supplies in a region where they depend on the Ogallala Aquifer, a massive underground reservoir under constant threat of overuse. Steve ...
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Using Soil Water Sensors to Improve Irrigation Management
Abstract Irrigation water management has to do with the appropriate application of water to soils, in terms of amounts, rates, and timing to satisfy crop water demands while protecting the soil and water resources from degradation. In this regard, ...
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Performance Evaluation of Selected Soil Moisture Sensors
Abstract Irrigation water management practices could greatly benefit from using soil moisture sensors that accurately measure soil water content or potential. Therefore, an assessment on soil moisture sensor reading accuracy is important. In this ...
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Improved Agricultural Irrigation Scheduling Using a Soil Water Content Sensor - Case Study
Abstract The key to scheduling irrigation timing and amounts is determining moisture depletion in the soil. Two common methods include tracking crop evapotranspiration (ETc) and tracking the water content with a sensor buried in the soil. In ...
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Monitoring of Nitrate Leaching in Sandy Soils: Comparison of Three Methods
Abstract Proper N fertilizer and irrigation management can reduce nitrate leaching while maintaining crop yield, which is critical to enhance the sustainability of vegetable production on soils with poor water and nutrient-holding capacities. This ...
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Irrigation and Nitrogen Best Management Practices Under Drip Irrigated Vegetable Production
Abstract Plastic mulch and drip irrigation are commonly used in high intensity vegetable production regions such as Florida. Drip irrigation can be much more efficient than sprinkler irrigation since only the root zone of the cropped area is ...
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Standardizing Characterization of Electromagnetic Water Content Sensors: 2 Part I. Methodology
Abstract Performance differences in the growing number of electromagnetic (EM) sensors designed to estimate soil water content from a variety of indirect measurements (e.g., from measured travel lime, capacitance, frequency shift, etc.), suggests ...
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Standardizing Characterization of Electromagnetic Water Content Sensors: 2 Part II. Evaluation of Seven Sensing Systems
Abstract Transmission line-type electromagnetic (EM) methods for estimating soil volumetric 7 water content (qv) have advanced significantly in recent years with many sensing systems 8 available. In order to estimate qv, EM systems make use of the ...
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A time domain transmission sensor with TDR performance characteristics
Abstract Time domain reflectometry (TDR) has become a standard method for determining water content in soils and porous media. However, the cost of instrumentation and the level of user ability required often limit its application, especially for ...