Jeff Chan

Introduction to Soil Surveys for Agronomic Use

The USDA’s Introduction to Soil Surveys for Agronomic Use, entitled “From the Surface Down”, is an introduction to soil types, horizons, and how they are measured. The intent of this publication is to increase user understanding of soils and acquaint them with the contents of a soil survey and supplemental interpretations that are important to […]

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Soil Geomorphology and Identification

When working with or studying the soil, it’s important to know what type of soil is being examined. Each type of soil has different characteristics, and will have different effects on water infiltration rates, water holding capacity, evapotranspiration rate, and other soil characteristics. Soil sensors are one popular way of measuring soil moisture, salinity, temperature

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Stevens Enhances Groundwater Remediation Effectiveness

The Stevens HydraProbe is now being used to monitor the progress of a new groundwater pollution clean up method called phytoremediation. Phytoremediation is the method by which trees are used to pull contamination out of groundwater. Remediation of contaminated aquifers can take many years to complete. The need for clean, healthy rivers, lakes and streams

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Stevens Water and US Farm Bill Helps Farmers Optimize Crop Irrigation & Fertilization

Agriculture is a major element for survival of the human race and of the economic system. 42 percent of the world’s laborers are employed in agriculture, making it by far the most common occupation. With agriculture using approximately 60 percent of available freshwater withdrawals, concerns continue to grow over farmers implementing water conservation practices. Increasing

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New Features Available in HydraMon v.1.3

We’ve updated our HydraMon app for iOS and Android devices. HydraMon allows users to configure and download data from the HydraProbe soil sensor through the HydraProbe Field Portable. Here’s what’s new in v.1.3: Ability to log the location of the sample using your smartphone’s GPS Add a memo to the data set Add an image

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Calibration of a Capacitance Soil Sensor Required to Achieve the Level of Accuracy Required for Satellite Ground Truthing

This study published in American Meteorological Society’s BAMS journal demonstrates the extent of variability in readings one can expect with a soil moisture sensor based on capacitance technology. To obtain the highest level of accuracy that is required for remote sensing applications, capacitance-based soil sensors often need to be recalibrated. The HydraProbe is an impedance-based

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Free Software Lets You Use HydraProbe to Determine Soil Water Retention Curve

The Soil Water Characteristics software is a hydraulic properties calculator, developed by the US Department of Agriculture and Washington State University. It estimates soil water tension, conductivity and water holding capability based on the soil texture, organic matter, gravel content, salinity, and compaction. The Soil Water Characteristics software is a hydraulic properties calculator, developed by

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Using the HydraProbe Soil Sensor for Determination of Flood Risk in the New York State Mesonet

In January 2014, the Department of Homeland Security established the New York State Early Warning Weather Detection System. The centerpiece of the system is the New York State Mesonet, a network of 125 weather stations across the state, with at least one site in every county. Each site measures temperature, humidity, wind speed and direction,

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