A Disturbing Synergism Between Cattle Ranch Burning Practices and Selective Tree Harvesting in the Eastern Amazon

Biotropica ◽  
1985 ◽  
Vol 17 (4) ◽  
pp. 265 ◽  
Author(s):  
Christopher Uhl ◽  
Robert Buschbacher
Keyword(s):  
Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 841
Author(s):  
Iveta Desaine ◽  
Annija Kārkliņa ◽  
Roberts Matisons ◽  
Anna Pastare ◽  
Andis Adamovičs ◽  
...  

The increased removal of forest-derived biomass with whole-tree harvesting (WTH) has raised concerns about the long-term productivity and sustainability of forest ecosystems. If true, this effect needs to be factored in the assessment of long-term feasibility to implement such a drastic forest management measure. Therefore, the economic performance of five experimental plantations in three different forest types, where in 1971 simulated WTH event occurred, was compared with pure, planted and conventionally managed (CH) Norway spruce stands of similar age and growing conditions. Potential incomes of CH and WTH stands were based on timber prices for period 2014–2020. However, regarding the economics of root and stump biomass utilization, they were not included in the estimates. In any given price level, the difference of internal rate of return between the forest types and selected managements were from 2.5% to 6.2%. Therefore, Norway spruce stands demonstrate good potential of independence regardless of stump removal at the previous rotation.


1974 ◽  
Vol 4 (4) ◽  
pp. 530-535 ◽  
Author(s):  
Edwin H. White

This paper reports the effects of whole-tree harvesting of eight cottonwood stands on the soil nutrient pool. The data indicate possible site degradation by depletion of soil reserves of N, P, and K but not Ca and Mg on a range of alluvial site conditions in Alabama. Foresters must establish the rate of nutrient removal in intensive tree cropping systems for a variety of species and sites and develop prescriptions to minimize the impact.


2017 ◽  
Vol 37 (3) ◽  
pp. 3365-3384 ◽  
Author(s):  
M. C. A. Leite ◽  
B. Chen-Charpentier ◽  
F. B. Agusto

1981 ◽  
Vol 11 (1) ◽  
pp. 99-104 ◽  
Author(s):  
C. H. Meng

The purpose of this study is to develop analytical formulae for special queuing situations which occur during the operations of the felling and processing devices of a tree harvester, and the pickup and processing devices of a tree processor. Analytical formulae are used to estimate mean waiting time and mean idle time; in case 1 both "input" times and processing times are normally distributed; in case 2 "input" times are normally distributed and processing times are Poisson distributed. "Input" time is a term used for convenience to denote time required to fell a tree by a harvester or time required to pick up a tree by a processor. Methods of choosing distributions for representing "input" times and processing times are provided. In addition, there are two examples, using historical data, which demonstrate the applications of the analytical formulae.


2014 ◽  
Vol 6 (11) ◽  
pp. 185-219 ◽  
Author(s):  
María Elena Nancy Dávila Moreno

En México, durante la Colonia, la ganadería surgió como un instrumento para privatizar las antiguas tierras indígenas y en torno a ésta se fueron generando complejos mecanismos de articulación social, institucionales y de defensa de privilegios de grupos territoriales, lo cual no contempló las devastadoras consecuencias ecológicas que implicaba su desarrollo. El objeto de estudio es la región de la Ciénega de Chapala, Michoacán (México), con el fin de vincular los cambios institucionales con la alteración del espacio físico, así como sus efectos identificando cuáles han sido los eventos a lo largo de la historia que determinaron su actual geografía. La Ciénega de Chapala, ha experimentado un importante grado de alteración en su paisaje, derivado de la apertura a la agricultura y a la ganadería extensiva desde el siglo XVI y, el caso de la Hacienda Guaracha es un ejemplo de cómo ocurrieron estos cambios desde las primeras concentraciones de tierra y agua en el siglo XVI hasta el final del siglo XIX. Palabras clave: ganadería, cambio institucional, estancia ganadera, Ciénega de Chapala, hacienda La Guaracha. The Emergence of Livestock in the Cienega de Chapala (Michoacán, Mexico). The Case of the Hacienda Guaracha (XVI-XIX centuries) AbstractIn Mexico, during the colonial period, livestock emerged as a tool to privatize former Indian lands and around them complex social mechanisms were generated which were institutional articulated to defend the privileges of territorial groups, which did not consider the devastating consequences involving ecological development. The study object is the region of the Cienega de Chapala, Michoacan (México), in order to link institutional changes with the alteration of the physical space as well as their effects by identifying what were the events throughout history that led to its current geography. The Cienega de Chapala has experienced a significant degree of changes in its landscape, derived from the opening to agriculture and extensive livestock since the sixteenth century. The case of Hacienda Guaracha is an example of how these changes occurred from the first land and water concentrations in the sixteenth century to the late nineteenth century.  Key words: livestock, institutional change, cattle ranch, Cienega de Chapala, Hacienda (Ranch) La Guaracha.


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