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Decagon Devices, Inc.
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Decagon Devices, Inc.

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Estimating the relative humidity in soil? Most people do it wrong, every time. Dr. Gaylon Campbell shares a lesson on how to correctly estimate soil relative humidity from his new book, "Soil Physics with Python." Read more:
Estimating the relative humidity in soil? Most people do it wrong…every time. Dr. Gaylon S. Campbell shares a lesson on how to correctly estimate soil relative humidity from his new book, Soil Physics with Python, which he recently co-authored with Dr. Marco Bittelli. A number of years ago a former student told me of a meeting he …
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Climate change is predicted to alter rainfall patterns. It isn’t clear how this might affect rangeland plants and the animals that rely on them for food. Researchers at UC Berkeley are working on finding answers. Their findings reveal some of the complexities involved in predicting ecosystem response to climate change. Read more…
Dr. Lauren Hallett, researcher at the University of California, Berkeley, recently conducted a study testing the importance of compensatory dynamics on forage stability in an experimental field setting where she manipulated rainfall availability and species interactions. She wanted to understand how climate variability affected patterns of species tradeoff in grasslands over time and how those …
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In addition to an accurate sensor, accurate air temperature measurement requires proper shielding and ventilation of the sensor. Read more:
In the conclusion to last week’s blog, Mark Blonquist, chief scientist at Apogee Instruments and air temperature measurement expert, explains the complexities of some proposed solutions to the problems that challenge accurate air temperature measurement. Solution: Passive Radiation Shield In addition to an accurate sensor, accurate air temperature measurement requires proper shielding and ventilation of the …
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People assume they can use a static louvered radiation shield along with a temperature sensor and start measuring accurate air temperature. That assumption is good, if you are at a site where the wind blows all the time. However, if the wind at your field site is less than 3 m/s, you’re going to see errors due to solar heating. Read more:
Mark Blonquist, scientist at Apogee Instruments and air temperature measurement expert, explains the difficulties of obtaining accurate air temperature.
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The WP4C Dewpoint Hygrometer is a fast, accurate, way to measure water potential in any porous material. Typically used to analyze soil, soilless substrates, plant material and seeds, it has been used to measure a variety of unusual things, including apples, bricks and even insect carapaces. http://www.decagon.com/en/soils/benchtop-instruments/wp4c-water-potential-meter/
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You asked for a data logger with longer battery life for remote deployments, we listened. We are excited to introduce our new solar-charging data loggers. Find out more:
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Take your soil moisture release curve further with high resolution data. With the Vapor Sorption Analyzer it is now possible to understand soil processes like cation-exchange and shrink-swell capacity. Understand more with automated measurements over several hundred data points along the dry end of the release curve.

http://www.decagon.com/en/soils/benchtop-instruments/vapor-sorption-analyzer/
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Want to increase yield and implement money saving irrigation practices? Stop by and see us today and tomorrow at the World Ag Expo in Pavilion B, booth 2428. 
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Be confident in your irrigation decisions. Optimize irrigation by using ET and soil moisture measurements. Stop by and see us today through Friday at Fruit Logistica.
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Rain, shine or otherwise, product testing and development still moves forward. Ryan Campbell braves the snow to test some of our instruments.
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"Under current conditions, about 4% of the world’s croplands experience drought in any given year, but by the end of the century those conditions are projected to jump to about 18% per year. Some studies indicate that horticulture crops – generally, everything besides staples – may be impacted most severely, largely because they tend to be constrained to a smaller geographic area."
Could some foods go extinct, or is the threat exaggerated? Rachel Nuwer investigates the myths and the reality.
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Dr. Stuart Campbell, professor of Biomedical Engineering at Yale University has been toying with the idea of using soil moisture sensors to measure tissue edema in human subjects. Read more:
Dr. Stuart Campbell, professor of Biomedical Engineering at Yale University has been toying with the idea of using soil moisture sensors to measure tissue edema in human subjects. He says he got the idea from Dr. Ken Campbell, former professor of Bioengineering at Washington State University: “I was explaining to Dr. Campbell about the sensors …
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We Measure the World
Introduction
Decagon designs, manufactures, and markets scientific instruments. The applied research division focuses on measuring water, light, and heat in the soil-plant-atmosphere continuum.
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1.509.332.2756