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Comment on "A Reservoir of Nitrate Beneath Desert Soils

Authors: 
Jackson, RB, ST Berthrong, CW Cook, EG Jobbágy, RL McCulley
Year: 
2004
Journal: 
Science
Journal Volume/Pages: 
304: 51

Walvoord et al. reported a large nitrate pool beneath desert soils (~104 kgN Ha-1) and similarly shaped soil nitrate and chloride profiles. Analyzing 16 new desert cores, we found nitrate values ~1-2 orders of magnitude lower (50-100 kgN Ha-1) and no relationship to chloride profiles. The generality of the deep nitrate pool is questioned.

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