HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by Ochsner, T. E. Articles by Horton, R. Search for Related Content PubMed Articles by Ochsner, T. E. Articles by Horton, R. Agricola Articles by Ochsner, T. E. Articles by Horton, R. Related Collections Agroclimatology Heat Transport

Field Tests of the Soil Heat Flux Plate Method and Some Alternatives

^a Soil & Water Management Research Unit, Agricultural Research Service, St. Paul, MN 55108
^b National Soil Tilth Laboratory, Agricultural Research Service, Ames, IA 50011
^c Dep. of Agronomy, Iowa State Univ., Ames, IA 50011

View larger version (29K): [in a new window]   Fig. 1. Time series of (a) soil heat flux at the reference depth (Gr) and (b) cumulative Gr at the bare soil site as measured by the three needle gradient method, the HFT1.1 plates, and the 610 plates.

View larger version (25K): [in a new window]   Fig. 2. Time series of (a) Gr and (b) cumulative Gr at the corn site as measured by the three needle gradient method, the single probe gradient method, and the HFT1.1 plates.

View larger version (30K): [in a new window]   Fig. 3. Time series of (a) Gr and (b) cumulative Gr at the soybean site as measured by the three needle gradient method, the HFT1.1 plates, and the HFP01SC plates. Note that for the sake of clarity (a) contains only a small portion of the data in (b).

View larger version (22K): [in a new window]   Fig. 4. One-to-one comparison of Gr at the bare soil site as measured by (a) the HFT1.1 plates and (b) the single probe gradient method vs. the three needle gradient method. The solid lines are the regression lines, and the dashed lines are the one-to-one lines.

View larger version (20K): [in a new window]   Fig. 5. One-to-one comparison of Gr at the corn site as measured by (a) the HFT1.1 plates and (b) the single probe gradient method vs. the three needle gradient method. The solid lines are the regression lines, and the dashed lines are the one-to-one lines.

View larger version (19K): [in a new window]   Fig. 6. One-to-one comparison of Gr at the soybean site as measured by (a) the HFT 1.1 plates and (b) the HFP01SC plates vs. the three needle gradient method. The solid lines are the regression lines, and the dashed lines are the one-to-one lines.

View larger version (21K): [in a new window]   Fig. 7. Midday vertical (a) soil water content and (b) temperature differences across plastic disks (below–above) buried 2 cm beneath a bare soil surface. Ambient gradients as measured in the adjacent soil and daily rainfall totals are also shown.