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
Sharing the water of the Ganges that India is drawing excessive water and the amount allocated to Bangladesh is unjust and insufficient. India in turn complains that the water allocated to Bangladesh leaves it with less water than necessary for the functioning of the Kolkata Port and the National Thermal Power Corporation in Farakka. Other critics have also stressed environmental reasons for India to reconsider its drawing of water at Farraka. Alarming increases in deforestation and erosion at the upper levels of the Ganges river increases the deposition of silt at the lower level, which is already measured at 2 million tonnes annually, along with increased