Vapour-pressure deficit the plant may dry out and die. For this reason the ideal range for VPD in a greenhouse is from 0.45 kPa to 1.25 kPa, ideally sitting at around 0.85 kPa. As a general rule, most plants grow well at VPDs of between 0.8 and 0.95 kPa. In ecology, it is the difference between the actual water vapour pressure and the saturation water vapour pressure at a particular temperature. Unlike relative humidity, vapour-pressure deficit has a simple nearly straight-line relationship to the rate of evapotranspiration and other measures of evaporation. To compute the VPD, we need the ambient (greenhouse) air
What the Water Gave Me (painting) What the Water Gave Me (painting) What the Water Gave Me ("Lo que el agua me dio" in Spanish) is an oil painting by Frida Kahlo that was completed in 1938. It is sometimes referred to as What I Saw in the Water. Frida Kahlo’s "What the Water Gave Me" was her biography. As the scholar, Natascha Steed, points out, "her paintings were all very honest and she never portrayed herself as being more or less beautiful than she actually was." With this piece she reflected on her life. Kahlo released her unconscious mind through the use of what seems