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Soil Water Evaporation: Surface Residue Rate and Placement Effects
Author(s) -
Bond J. J.,
Willis W. O.
Publication year - 1969
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1969.03615995003300030031x
Subject(s) - loam , residue (chemistry) , chemistry , potential evaporation , evaporation , soil science , soil water , environmental science , thermodynamics , biochemistry , physics
Evaporation with time was measured from columns of originally wetted fine sandy loam soil subjected to uniform daily evaporative potential and treated with various rates of surface residue. During the initial constant rate drying stage, evaporation decreased with increasing residue rates. Conjunctively, the period of constant rate drying was appreciably lengthened with decreasing evaporation rates. After prolonged falling rate drying, cumulative evaporative losses were nearly equal irrespective of surface residue. It was hypothesized that during falling rate drying and with limited quantities of residue, total evaporation might be less if the residue were placed on less than the entire soil surface in concentrated zones. Utilizing the available data, calculated curves were constructed which supported the hypothesis.