In:
Soil Science Society of America Journal, Wiley, Vol. 49, No. 5 ( 1985-09), p. 1075-1082
Abstract:
One hundred neutron access pipes were placed 1‐m apart along a 100‐m transect together with tensiometers located at soil depths of 0.3 and 0.6 m. After ponding the experimental site with water for at least 4 d, the site was allowed to drain and covered with 0.3 m of straw to reduce evaporation. Measurements of soil‐water content θ and soil‐water pressure head ( h ) initially made at 2‐h intervals were made less frequently as redistribution proceeded. The (θ, h|t )—observations were fitted to the five‐parameter van Genuchten model. Spatial autocorrelations and cross‐correlations of θ, h , and percentage sand manifested significant coefficients for distances as great as 10 m. The practical significance of this research is that it addresses the impact of the separation distance between a tensiometer and a neutron meter access tube on the precision of the measured soil‐water characteristic curve. Greater precision is obtained for separation distances 〈 10 m.
Type of Medium:
Online Resource
ISSN:
0361-5995
,
1435-0661
DOI:
10.2136/sssaj1985.03615995004900050001x
Language:
English
Publisher:
Wiley
Publication Date:
1985
detail.hit.zdb_id:
241415-6
detail.hit.zdb_id:
2239747-4
detail.hit.zdb_id:
196788-5
detail.hit.zdb_id:
1481691-X
SSG:
13
SSG:
21
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