Vapour-pressure deficit temperature, the relative humidity and, if possible, the canopy air temperature. We must then compute the saturation pressure. Saturation pressure can be looked up in a psychrometric chart or derived from the Arrhenius equation, a way to compute it directly from temperature is where: To convert between Rankine and degrees Fahrenheit: formula_10 We compute this pressure for both the ambient and canopy temperatures. We then can compute the actual partial pressure of the water vapour in the air by multiplying by the relative humidity [%]: and finally VPD using formula_12 or formula_13 when the canopy temperature is known. Vapour-pressure deficit
Water of Life (Christianity) Water of Life (Christianity) In Christianity the term "water of Life" ( "hydōr zōēs") is used in the context of "living water", specific references appearing in the Book of Revelation ( and ), as well as the Gospel of John. In these references, the term "Water of Life" refers to the Holy Spirit. The passages that comprise are sometimes referred to as the Water of Life Discourse. These references in the Gospel of John are also interpreted as the "Water of Life". The term is also used when water is poured during Baptismal prayers, praying for the Holy Spirit, e.g.,