MORPHOLOGY AND CLASSIFICATION OF SOME DARK-COLORED SOILS OF VANCOUVER ISLAND, BRITISH COLUMBIA

1980 ◽  
Vol 60 (4) ◽  
pp. 747-755 ◽  
Author(s):  
KLAAS BROERSMA ◽  
L. M. LAVKULICH

In the southeastern portion of Vancouver Island are found soils that are dark-colored in their surface horizons. These dark-colored surface horizons are mainly the result of the climate and vegetation. The surface horizons can be classified as either Ah(f) or Bhf horizons using the criteria of the System of Soil Classification for Canada. The B horizons were designated podzolic (Bf or Bhf) even though not all criteria were met for all horizons. The soils were classified as Sombric Humo Ferric Podzols, as this subgroup appeared the most suitable.

1987 ◽  
Vol 67 (2) ◽  
pp. 383-394 ◽  
Author(s):  
L. E. LOWE ◽  
A. M. SCAGEL ◽  
K. KLINKA

In order to assess the extent to which chemical properties of organic horizons support their differentiation on the basis of morphological characteristics, as used in the Canadian System of Soil Classification (CSSC), a total of 265 samples of organic horizons (including L, F, H, Of, Om and Oh) were analyzed for 26 chemical properties (organic and inorganic). One-way analysis of variance, correlation analysis and tests of normality were used to select variables for canonical variates analysis (CVA). The results of CVA indicated that the six types of horizon could be distinguished by a combination of chemical properties, and that the grouped upland (L-F-H) horizons could be distinguished from the grouped wetland (Of-Om-Oh) horizons. The results provided support for the present usage in the CSSC, based on field morphology. It was concluded that there remained a need to improve definitions, to review designations, and to develop quantitative diagnostic criteria for organic horizons. Some problems in the classification of organic horizons are discussed, particularly in relation to a hierarchical system. Key words: Organic horizons, horizon classification, British Columbia, chemical properties


1987 ◽  
Vol 67 (4) ◽  
pp. 795-810 ◽  
Author(s):  
G. A. SINGLETON ◽  
L. M. LAVKULICH

A soil chronosequence near Cox Bay, on the west coast of Vancouver Island, British Columbia was investigated. Soils in the sequence have developed on sandy beach deposits, which are advancing toward the ocean at a rate of 0.26 m per year. Dendrochronology and geomorphology established surface ages ranging from 127 to 550 yr for seven selected pedons across these deposits. With soil age, there was progressive deepening and differentiation of genetic horizons, resulting in soil classification that ranged from an Orthic Dystric Brunisol at the youngest site (site 1) to an Orthic Humo Ferric Podzol at the oldest site (site 7). Organic matter increased from a maximum value for mineral horizons of 1.1% in the Bm of site 1 to 4.7% in the Ae of site 7. Oxalate-extractable Al in the uppermost B horizons of the soils increased from 0.12% at site 1 to 0.30% at site 6. Available Mg and K from the lowermost horizons sampled decreased from 35 and 25 mg kg−1 to 4 and 5 mg kg−1, respectively, when moving from sites 1 to 6. Accumulations of organic matter, Fe and Al, and losses of available Mg were plotted against soil age and yielded chronofunctions with exponential solutions. Key words: Soil chronosequence, soil genesis, Podzol development, chronofunctions


2018 ◽  
Vol 603 ◽  
pp. 189-200 ◽  
Author(s):  
WD Halliday ◽  
MK Pine ◽  
APH Bose ◽  
S Balshine ◽  
F Juanes

2006 ◽  
Vol 70 (1) ◽  
pp. 78-83 ◽  
Author(s):  
X. Z. Shi ◽  
D. S. Yu ◽  
E. D. Warner ◽  
W. X. Sun ◽  
G. W. Petersen ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document