New Product: Radiation Frost Detection Sensor (SF-110)
At the beginning of each growing season, as leaves and buds begin to emerge, crops will be susceptible to frost damage. On clear, calm nights, leaf and bud temperature can drop below freezing even if air temperature remains slightly above 0 °C…
Estimating the Canopy Fraction in your IRR Field of View
A common problem many individuals face when making canopy temperature measurements with an infrared radiometer (IRR) involves estimating the fraction of the field of view that is occupied by canopy (leaves and stems) and soil. This is important in…
Weather Mapping
Last Wednesday the USDA released a new Plant Hardiness Zone Map. There were several significant changes in this update from the previous map that was released in 1990. The change that has garnered the most media attention is a general shift in many…
Daily Light Integral: Measuring Light for Plants
This graph illustrates the year-round variability of global horizontal irradiance at Apogee Instruments in Logan, Utah.
As the winter solstice fast approaches, so do the shortened days and lengthy nights. In fact, I've already begun to not…