A spruce tree is 20 m tall with a trunk diameter of 0.4 m. Its needles have a measured water potential of –2.5 MPa, while the roots have a measured water potential of –1.2 MPa. Hydraulic conductivity through the stems is 7×10–8m3s/kg. What is the transpiration rate of the tree (in g H2O/s), assuming that 1.5% of the stem cross sectional area contains water-conducting vessels? Hints:1 MPa = 106kg/(m·s2); water density = 1 g/cm3Start by using the flow equation (p. 104 CMV textbook) to calculate the rate of water movement in m s-1Multiply the rate by the cross-sectional area of water-conducting vessels ment through soils. The rate of water flowthrough the soil () depends on the driving force(the gradient in water potential) and the resis-tance to water movement. This resistance, in turn,depends on the hydraulic conductivity (L) ofthe soil, and the path length (l) of the columnthrough which the water travels.(4.5)

Name: A spruce tree is 20 m tall with a trunk diameter of 0.4 m. Its needles
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Description: A spruce tree is 20 m tall with a trunk diameter of 0.4 m. Its needles have a measured water potential of –2.5 MPa, while the roots have a measured water potential of –1.2 MPa. Hydraulic conductivity through the stems is 7×10–8m3s/kg. What is the tra

The given information is:Water potential of needles is -2.5 MPa.Water potential of roots is -1.2…

Answered: ment through soils. The rate of water…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A spruce tree is 20 m tall with a trunk diameter of 0.4 m. Its needles have a measured water potential of –2.5 MPa, while the roots have a measured water potential of –1.2 MPa. Hydraulic conductivity through the stems is 7×10^–8m³s/kg. What is the transpiration rate of the tree (in g H₂O/s), assuming that 1.5% of the stem cross sectional area contains water-conducting vessels?

Hints:

1 MPa = 10⁶kg/(m·s²); water density = 1 g/cm³
Start by using the flow equation (p. 104 CMV textbook) to calculate the rate of water movement in m s^-1
Multiply the rate by the cross-sectional area of water-conducting vessels

ment through soils. The rate of water flow
through the soil () depends on the driving force
(the gradient in water potential) and the resis-
tance to water movement. This resistance, in turn,
depends on the hydraulic conductivity (L) of
the soil, and the path length (l) of the column
through which the water travels.
(4.5)

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