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Garden with Insight v1.0 Help: Nitrogen - Nitrate Transport by Soil Water Evaporation


When water is evaporated from the soil, NO3-N is moved upward into the top soil layer by mass flow. The equation for estimating this NO3-N transport is [Equation 163] where ENO3 is the amount of NO3-N in kg/ha moved from lower layers to the top layer by soil water evaporation E(s) in mm, subscript l refers to soil layers, and M is the number of layers contributing to soil water evaporation (maximum depth is 0.2 m).

Equation 163

ENO3 = (sum from l = 2 to M of) SEV* * (C(NO3))
Code:
same
Variables:
ENO3 = NitrateMovedToFirstLayerFromSoilEvap_kgPha
M = numLayers
SEV* = evaporation_mm
C(NO3) = meanNitrateConcThisLayer_gPm3

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 Updated: May 4, 1998. Questions/comments on site to webmaster@kurtz-fernhout.com.
Copyright © 1998 Paul D. Fernhout & Cynthia F. Kurtz.