Summary
Published in Canadian Journal of Soil Science 75: 343-348
A Podzolic soil from an old-growth maple hardwood forest in eastern Canada was systematically sampled from a 16.5-m-long trench in 1975. ln 1986, the upper 10 cm of the B horizon was resampled from two sampling lines located on each side and parallel to the 1975 trench, one at a distance of 1 m downhill and the other at a distance of 4 m uphill. Total N, organic C, pH, and exchangeable Ca, Mg and K were measured. The objectives were to evaluate the change in the chemical status of the B horizon from 1975 to 1986 and to characterize the spatial variability of the horizon. No significant change was found in the soil chemical properties tested during this 11-yr period. No significant autocorrelation was observed between soil samples 60 cm apart, except for the downhill sampling line, which was located 1 m from the trench. For most properties, the magnitude of the difference between two soil sampling units was not proportional to the distance separating them over the range of 0.6-4.2 m. Except for pH, a difference in soil properties of more than 30% was observed in 37-56% of sampIe pairs 60 cm apart. Resampling near (1 m) an old soil pit may not be valid because of possible local modifications of soil properties created by the pit, even when it is filled in.
Sector(s):
Forests
Categorie(s):
Scientific Article
Theme(s):
Forestry Research, Forests, Silviculture
Departmental author(s):
Author(s)
GODBOUT, Christian and Jean-Louis BROWN
Year of publication :
1995
Format :
paper
How to get the publication :
Keywords :
podzol, soil variability, acidic deposition, soil changes, chemical analysis, ion concentration, pH, statistical analysis, variabilité du sol, pluie acide, changements du sol, sylviculture des forêts naturelles feuillues, sylviculture des forêts naturelles, silviculture and yield of natural forests - hardwood stands
