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Correction of cone index for soil water content differences in a coastal plain soil

Busscher, W.J. and Bauer, P.J. and Camp, C.R. and Sojka, R.E. (1997) Correction of cone index for soil water content differences in a coastal plain soil. Soil & Tillage Research. 43:205-217.

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Soil penetration resistance (cone index) varies with water content. The field variation of water
content could mask treatment differences. The correction of cone index data to a single water
content would help prevent this. We used equations from TableCurve software and from the
literature to correct cone indices for differences in soil water contents. Data were taken from two
field experiments where cotton (Gossypium hirsutum L.) was grown using conventional and
conservation tillage without irrigation, and beans (Phaseolus vulgaris L.) were grown using
conventional tillage with microirrigation. Boundary conditions based on hard, dry and soft. wet
soils were imposed on the equations. Equations fit the data with coefficients of determination
ranging from 0.55 to 0.92 and error mean squares from 1.37 to 6.35. After correction, cone index
dependence on water content was reduced. A single-equation correction did not always fit the data
across all treatments. Separate corrections, based on treatment, might be required. When corrections
required multiple equations, differences may be real or may be a manifestation of the
correction differences. In this case, the correction may not be feasible (unless some future work
can coordinate different equations and assure a uniform correction).

Item Type: Article
NWISRL Publication Number: 0955
Subjects: Soil > Soil water (soil moisture)
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:54
Last Modified: 21 Nov 2016 19:43
Item ID: 688