Calibrating your digital humidity sensors
On a recent post I talked about vapor pressure deficit and its importance in hydroponic culture. To adequately control VPD it’s necessary to accurately measure relative humidity and in order to do…
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Probes for constant immersion in hydroponic nutrient solutions
If you have a hydroponic crop then you probably have to measure and monitor the pH and EC of your nutrient solutions. This means taking probes out of storage, ensuring they…
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Five things that will damage your pH probes
Since pH is one of the most important variables to control in hydroponic culture almost all hydroponic growers have and use pH probes. There are however several things that can…
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Vapor pressure deficit (VPD) in hydroponics
If you have read books or articles about greenhouse environmental control you have probably heard about Vapor Pressure Deficit, also known as VPD. This is an important variable to measure…
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Maximizing yields per area in hydroponics
Since the 1940’s hydroponics – which I use to talk about a broad variety of soilless growing methods – have promised to deliver better plant yields than soil culture with…
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A few basics of leaf tissue analysis in hydroponic crops
Adequate nutritional control is difficult. Although there are several tools to control your plant’s chemical environment – such as pH, EC and ORP – in the end the main interest…
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Managing a Run To Waste (RTW) hydroponic crop from a nutritional perspective
Today it’s very common to create hydroponic crops using techniques where nutrient solution is not recycled. This type of crop, commonly called drain-to-waste (DTW) or run-to-waste (RTW) offers the advantage…
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Using coco coir in hydroponics
Side by side with peat moss, coco coir is one of the most commonly used media in hydroponic culture. Its excellent root propagation and aeration properties, coupled with its adequate…
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Measuring ion concentrations in hydroponics using electronic tongues
One of the biggest problems in hydroponic research is the measuring of individual ion levels in hydroponic solutions. Right now there is no commercial solution for the accurate tracking of…
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Using Peat Moss in Hydroponic Culture
There are several different types of media available for hydroponic culture and from these peat moss is one of the most popular due to its low cost and high availability…
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