soilphysics-package: Soil Physical Analysis
Description
Basic and model-based soil physical analyses.Details
ll{
Package: soilphysics
Type: Package
Version: 1.2
Date: 2014-10-13
License: GPL (>= 2)
}
This package contains functions for modelling the soil water retention,
the load bearing capacity and the penetration resistance. There are some useful
and easy-to-use functions to perform parameter estimation of these models.
Methods to obtain the preconsolidation stress are available, such as Casagrande (1936) and so on.
There is a function to determine the soil critical moisture and the maximum bulk density
for one or more samples, based on the Proctor (1933) compaction test. Also, others utilities like a
function to calculate the soil liquid limit, the void ratio and to determine the maximum curvature
point are available.References
ABNT - Associacao Brasileira de Normas Tecnicas. (1990). Ensaio de
adensamento unidimensional: NBR 12007. Rio de Janeiro. 13p.
Arvidsson, J.; Keller, T. (2004). Soil precompression stress
I. A survey of Swedish arable soils. Soil & Tillage Research, 77:85-95.
Bowles, J. A. (1986). Engineering Properties of Soils and their
Measurements. 3rd ed. McGraw-Hill Book Company, Inc. NY, 218pp.
Busscher, W.J. (1990) Adjustment of flat-tipped penetrometer resistance
data to common water content. Transactions of the ASAE, 3:519-524.
Casagrande, A. (1936). The determination of the pre-consolidation
load and its practical significance. In: Proceedings of the
International Conference on Soil Mech. and Found. Eng.
(ICSMFE), Cambridge, MA, 22-26 June 1936, vol. 3. Harvard
University, Cambridge, MA, USA, pp. 60-64.
Dexter, A. R. (2004). Soil physical quality Part I. Theory,
effects of soil texture, density, and organic matter,
and effects on root growth. Geoderma, 120:201-214.
Dias Junior, M. S. (1994). Compression of three soils under longterm
tillage and wheel traffic. 1994. 114p. Ph.D. Thesis - Michigan
State University, East Lansing.
Dias Junior, M. S.; Pierce, F. J. (1995). A simple procedure for
estimating preconsolidation pressure from soil compression curves.
Soil Technology, 8:139-151.
Genuchten, M.T. van. (1980) A closed form equation for predicting the
hydraulic conductivity of unsaturated soils. Soil Science Society of
America Journal, 44:892-898.
Leao et al. (2005). An Algorithm for Calculating the Least Limiting Water Range of Soils.
Agronomy Journal, 97:1210-1215.
Leao et al. (2006). Least limiting water range: A potential indicator of changes in near-surface
soil physical quality after the conversion of Brazilian Savanna into pasture.
Soil & Tillage Research, 88:279-285.
Mualem, Y. (1976) A new model for predicting the hydraulic conductivity
of unsaturated porous media. Water Resources Research, 12:513-522.
Proctor, E. R. (1933). Design and construction of rolled earth dams.
Eng. News Record, 3:245-284, 286-289, 348-351, 372-376.
Silva et al. (2010). Indicadores da qualidade fisica do solo. In: Jong Van Lier, Q. (Ed).
Fisica do solo. Vicosa (MG): Sociedade Brasileira de Ciencia do Solo. p.541-281.
Silva et al. (1994). Characterization of the least limiting water range of soils.
Soil Science Society of America Journal, 58:1775-1781.
Sowers, G. F. (1965). Consistency. In: BLACK, C.A. (Ed.). Methods of soil analysis.
Madison: American Society of Agronomy. Part 1, p.391-399. (Agronomy, 9).
Sowers, G. F. (1965). Consistency. In: KLUTE, A. (Ed.). 2nd ed. Methods of soil analysis.
Madison: American Society of Agronomy. Part 1, p.545-566.