Virtual Seminar: Using the Leaf Porometer in Vineyard Water Management
Dr. Mark Greenspan, one of the world's leading experts on wine grape irrigation, will discuss why he measures stomatal conductance in vineyards and how the measurement of stomatal conductance differs from the more traditional pressure chamber measurements » Read More
Virtual Seminar: Lysimetry Basics
This recording is from the second seminar session given at 6pm PDT. » Read More
Virtual Seminar: Measurements and Models for Macropore Infiltration in Soil
This seminar by Dr. John Norman shows how to use a single-ring, dual-head, ponded infiltration technique with the analysis of Reynolds and Elrick to get key parameters for use in a macropore infiltration model. These same measurements can also be used to obtain values of the saturated hydraulic conductivity which is useful for traditional infiltration models such as the Green and Ampt formulation. Macropore models that include characterization of the geometry of the macropores tend to be complicated and require more parameters than can be determined from a reasonable set of independent measurements. The M&M model is a relatively simple macropore model that requires only nine parameters. Three or four of these can be determined from a standard description of soil structure. One comes from the Coefficient of Linear Extensibility and four or five are obtained from ponded-infiltration and hydraulic properties measurements. This seminar will focus on the ponded infiltration measurements. The parameters from hydraulic properties will be the subject of another seminar.
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Virtual Seminar: Using Decagon Moisture Sensors for the Precision Irrigation of Soilless Substrates
VS09112009 » Read More
Virtual Seminar: Accurate and Reliable Soil Moisture Characteristic Curves (Moisture Release Curves) using Vapor Pressure Methods
Watch an archive of the seminar » Read More
Virtual Seminar: Strawberries: The Effects of Modifying Irrigation Methods for Transplant Establishment
As drought management becomes an essential component of many irrigation strategies around the world, growers continue to find new ways to conserve water without compromising crop quality or yield. This seminar investigates irrigation strategy changes by focusing on strawberry crops in California. » Read More
Virtual Seminar: Quick Methods for Determining Plant Available Water
Quick Methods for Determining Plant Available Water » Read More
Introducing DataTrac 3
New DataTrac 3 transforms endless columns and rows of soil moisture and environmental data into meaningful metrics, such as plant available water, vapor pressure deficit, and growing degree days. In this virtual seminar, we’ll walk you through the basics of the new software and take your questions on putting DataTrac 3 to... » Read More
Virtual Seminar: Basics of Leaf Porometry
In this webinar, Chris Chambers provided some useful tips and information on measuring stomatal conductance through the use of leaf porometry instrumentation. He also had the opportunity to answer several questions from attendees. The webinar touched on the following areas: » Read More
Virtual Seminar: New Vadose Zone Monitoring Technology
Minimization of subsurface pollution and optimization of remediation efficiency depend on reliable and effective subsurface-monitoring tools that provide real-time information on the chemical and hydrological state of the percolating water. Unfortunately, today, most monitoring programs are based on information obtained from observation wells penetrating groundwater. » Read More
Virtual Seminar: Soil Moisture Sensors for Irrigation Control and Drought Stress Research of Greenhouse and Nursery Crops
Join guest speaker Marc van Iersel from the University of Georgia for a presentation addressing two key areas in irrigation management where soil moisture sensors have been used beyond measuring the water content of soils or soilless substrates. » Read More
Virtual Seminar: Soil Water Drainage Measurement and Soil Water Sampling
The presentation will also cover methods of collecting soil water for solute concentration analysis including porous suction cups and plates. Consideration will be given to the sorption effects due to the chemical composition of the porous cup/plate, and » Read More
Virtual Seminar: Standardized Methods for Measuring Intercepted PAR in Canopies using Ceptometers
This virtual seminar with guest speaker Dr. Mari-Vaughn Johnson explores the need to adopt a universally accepted, repeatable sensor deployment method to produce consistent results » Read More
Virtual Seminar: Quantification of Resource Capture Efficiency for Cultivar Improvement
Production of total and harvestable biomass by crops depends on their ability to capture resources from their environment. Water and nutrients are obtained from the soil. CO2 and energy (light) are obtained from the above-ground environment. Some relative » Read More
Virtual Seminar: Soil Moisture Measurement Methods and Field Applications
The objective of this seminar is to give an overview of the different methods to measure soil water content, discuss the theory behind the measurement, and provide some examples of field research and what technology might apply in each situation. » Read More
Virtual Seminar: Why Does my Soil Moisture Sensor Read Negative? How Accuracy of Dielectric Soil Moisture Sensors can Change your Data Set
Dielectric soil moisture sensors are used all over the world to measure soil water content for water balances, irrigation scheduling strategies, and other plant-soil-atmosphere continuum studies. However, understanding how the instruments actually measure » Read More
Virtual Seminar: Solute Signatures: Monitoring and Interpreting Salt and Nitrate Levels in the Root-Zone
Monitoring electrical conductivity at different depths in soil can sometimes give more information about an irrigation strategy than monitoring soil moisture at the same depths in soils. Because soluble salts (e.g. nitrate) move with the water, nitrate d » Read More
Virtual Seminar Index
This index provides a list of Decagon's archived Virtual Seminars with a brief description of each seminar. Follow the links on this page to watch any of our archived seminars. » Read More
Virtual Seminar: "TDR in Soil - Where can TDR Go?"
video » Read More
Virtual Seminar: Best Practices of Soil Moisture Measurements
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Virtual Seminar: Methods of Sampling and Analyzing Soil Pore Solution
video » Read More
Free Virtual Seminar: Basic Principles of Radiation Measurement to Predict ET, Climate Change, Photosynthesis, and Crop Yield
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Free Virtual Seminar: Best Practices for SDI-12 Sensor Networks
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