Effect of timber harvesting on extractable nutrients in a northern Rocky Mountain forest soil

1987 ◽  
Vol 17 (7) ◽  
pp. 735-739 ◽  
Author(s):  
James A. Entry ◽  
Nellie M. Stark ◽  
Howard Loewenstein
Keyword(s):  
Forest Soil ◽  
Rocky Mountain ◽  
Timber Harvesting ◽  
Organic Horizon ◽  
Mountain Forest ◽  
Decomposition Rates ◽  
Total N ◽  
Clear Cut ◽  
Extractable P ◽  
Extractable Nutrients

Extractable nutrients were measured for 2 years in the organic horizon of a forest soil from a Rocky Mountain site subjected to four harvesting treatments (clear-cut and residue left, clear-cut and residue removed, clear-cut and residue burned, uncut control). Concentrations of extractable P, Ca, K, and Mg were significantly lower in winter than in spring, fall, or summer in all treatments except the clear-cut with residue left; decomposition rates of lodgepole pine (Pinuscontorta var. latifolia Engelm.) needles also were significantly higher in this than in any of the other treatments. Concentrations of extractable B, Cu, Fe, Mn, Na, Si, Zn, and total N did not differ significantly regardless of treatment or season, nor did concentrations of nutrients leached through the organic horizon, which suggests that litter acts as a nutrient sink, retaining nutrients on the cation exchange and releasing them slowly. Managers should leave as much organic residue as possible on harvested sites where soil nutrients are suspected of limiting tree growth to ensure adequate nutrition and moisture for conifer regeneration.

Effect of timber harvesting on microbial biomass fluxes in a northern Rocky Mountain forest soil

1986 ◽  
Vol 16 (5) ◽  
pp. 1076-1081 ◽  
Author(s):  
James A. Entry ◽  
Nellie M. Stark ◽  
Howard Loewenstein
Keyword(s):  
Microbial Biomass ◽  
Snow Cover ◽  
Forest Soil ◽  
Soil Ph ◽  
Rocky Mountain ◽  
Timber Harvesting ◽  
Soil Microbial Activity ◽  
Mountain Forest ◽  
Clear Cut ◽  
Soil Temperatures

Microbial biomass and relative bacterial and fungal percentages were measured in organic forest soil from a Rocky Mountain site subjected to four harvesting treatments: RL, clear-cut and residue left; RR, clear-cut and residue removed; RB, clear-cut and residue burned; C, uncut control. Microbial biomass peaked in spring and fall regardless of treatment. Biomass in soil from the RB treatment was significantly (p < 0.05) less than that in soil from the other treatments most of the year; biomass did not significantly differ in soil from the RR and C treatments. During summer and winter, microbial biomass in soil from the RL treatment was significantly greater than that in soil from any other treatment, probably because of the large amount of organic residue left after harvest; moreover, this residue insulated the soil, preventing it from drying or freezing. At soil temperatures above 5 °C, microbial biomass correlated positively with soil moisture regardless of treatment; at soil temperatures below 2.5 °C, microbial biomass correlated positively with increasing soil temperature. During periods with snow cover, bacterial and fungal percentages were roughly equal regardless of treatment; during the rest of the year, bacterial percentages were high in the RL and RB treatments and low in the RR and C treatments. During periods without snow cover, bacterial and fungal percentages correlated positively with increasing soil pH; however, at near-freezing temperatures the percentage of bacteria and fungi seemed unaffected by soil pH. These findings suggest that treatments that remove a large portion of available site nutrients while reducing soil microbial activity could limit stand development.

Microbial community structure and activity in a Colorado Rocky Mountain forest soil scarred by slash pile burning

2007 ◽  
Vol 39 (5) ◽  
pp. 1111-1120 ◽  
Author(s):  
Aida E. Jiménez Esquilín ◽  
Mary E. Stromberger ◽  
William J. Massman ◽  
John M. Frank ◽  
Wayne D. Shepperd
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Forest Soil ◽  
Microbial Community Structure ◽  
Rocky Mountain ◽  
Mountain Forest ◽  
Structure And Activity

Characterization of basaltic clay soils (vertisols) from the Oxford land system in central Queensland

Soil Research ◽  
1990 ◽  
Vol 28 (6) ◽  
pp. 841 ◽  
Author(s):  
AA Webb ◽  
AJ Dowling
Keyword(s):  
Clay Soils ◽  
Total N ◽  
Organic C ◽  
Land System ◽  
Group Position ◽  
Dominant Soil ◽  
Extractable P ◽  
General Decline ◽  
Close Proximity ◽  
Native Pasture

Morphological, chemical and physical properties of basaltic clay soils (Vertisols-Usterts and Torrerts) from the Oxford Land System in central Queensland are described and compared over their geographical range of occurrence and also their position in the landscape. These soils are derived from undifferentiated basic lavas and interbedded pyroclastics of Tertiary age. Black earths are the dominant soil group. Position on slope had the biggest influence on depth of soil, with crest and mid-upper slope positions having more shallow (<0.9 m) soils than mid-lower and footslope positions. Soils have very high CEC and clay contents throughout the profile, are mildly alkaline at the surface and strongly so at depth, are non-saline and non-sodic (except in some footslope positions), and have an exchange complex dominated by calcium and magnesium. In the surface 0.1 m, extractable P and Zn, and total N and S levels are low and crop responses to fertilizer are probable. In comparison of 26 paired sites, where areas of native pasture and cultivation occur in close proximity, cultivated soils have lower organic C and total N, P, K and S levels than native pasture soils. This reflects a general decline in soil fertility under cultivation, and has implications for soil management and long-term soil stability.

scholarly journals Microbial functionality as affected by experimental warming of a temperate mountain forest soil—A metaproteomics survey

2017 ◽  
Vol 117-118 ◽  
pp. 196-202 ◽  
Author(s):  
Dong Liu ◽  
Katharina M. Keiblinger ◽  
Andreas Schindlbacher ◽  
Uwe Wegner ◽  
Hanyin Sun ◽  
...  
Keyword(s):  
Forest Soil ◽  
Mountain Forest ◽  
Experimental Warming

scholarly journals PREDICTABILITY IN THE PRODUCTIVE PROCESS OF THINNING AND CLEARCUTTING MECHANIZED OPERATIONS IN Pinus taeda L.

FLORESTA ◽  
2019 ◽  
Vol 50 (1) ◽  
pp. 933
Author(s):  
Bruna Martins Garcia ◽  
Philipe Ricardo Casemiro Soares ◽  
Jean Alberto Sampietro ◽  
Caroline Fernandes
Keyword(s):  
Critical Points ◽  
Control Charts ◽  
Timber Harvesting ◽  
Statistical Process ◽  
Pareto Chart ◽  
Clear Cut ◽  
Forestry Sector ◽  
Productive Process ◽  
Harvesting Process ◽  
Pinus Taeda L

Some organizations in the Brazilian forestry sector, especially in the activities carried out in forest stands, do not follow the development pace of other industries and the adoption rate of management and quality methodologies and tools. This study aimed to evaluate the predictability of timber harvesting process based on critical points identified in the selective thinning and clear cut operations. Interviews and Pareto chart were used, for the identification and evaluation of the critical points, respectively, and for the evaluation of the process, it was used the Statistical Process Control (SPC) by attributes and variables in the main failures. In the interviews conducted with workers, seven critical points were identified. The evaluation with Pareto chart showed that 80% of the failures identified during harvest are attributed to the damage to the remaining trees, sorting (measures of length and diameter of the product) and stump height. Among the possible causes of the critical points are problems with employees’ training, regular maintenance of machinery and operations planning. In the evaluation with the CEP, the control charts indicated that the sorting and stump height, although within the limits specified by the company, was considered unstable and unpredictable

scholarly journals Burkholderia humisilvae sp. nov., Burkholderia solisilvae sp. nov. and Burkholderia rhizosphaerae sp. nov., isolated from forest soil and rhizosphere soil

2015 ◽  
Vol 65 (Pt_9) ◽  
pp. 2986-2992 ◽  
Author(s):  
Jae-Chan Lee ◽  
Kyung-Sook Whang
Keyword(s):  
16S Rrna ◽  
Forest Soil ◽  
Type Strain ◽  
Phylogenetic Trees ◽  
Gene Sequence ◽  
Rhizosphere Soil ◽  
Optimal Growth ◽  
Mountain Forest ◽  
Rrna Gene ◽  
Phenotypic Data

Strains Y-12T and Y-47T were isolated from mountain forest soil and strain WR43T was isolated from rhizosphere soil, at Daejeon, Korea. The three strains grew at 10–55 °C (optimal growth at 28–30 °C), at pH 3.0–8.0 (optimal growth at pH 6.0) and in the presence of 0–4.0  % (w/v) NaCl, growing optimally in the absence of added NaCl. On the basis of 16S rRNA gene sequence analysis, the three strains were found to belong to the genus Burkholderia, showing the closest phylogenetic similarity to Burkholderia diazotrophica JPY461T (97.2–97.7  %); the similarity between the three sequences ranged from 98.3 to 98.7  %. Additionally, the three strains formed a distinct group in phylogenetic trees based on the housekeeping genes recA and gyrB. The predominant ubiquinone was Q-8, the major fatty acids were C16 : 0 and C17 : 0 cyclo and the DNA G+C content of the novel isolates was 61.6–64.4 mol%. DNA–DNA relatedness among the three strains and the type strains of the closest species of the genus Burkholderia was less than 50  %. On the basis of 16S rRNA, recA and gyrB gene sequence similarities, chemotaxonomic and phenotypic data, the three strains represent three novel species within the genus Burkholderia, for which the names Burkholderia humisilvae sp. nov. (type strain Y-12T = KACC 17601T = NBRC 109933T = NCAIM B 02543T), Burkholderia solisilvae sp. nov. (type strain Y-47T = KACC 17602T = NBRC 109934T = NCAIM B 02539T) and Burkholderia rhizosphaerae sp. nov. (type strain WR43T = KACC 17603T = NBRC 109935T = NCAIM B 02541T) are proposed.

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