Slash-bum

Maximum soil surface temperature in coniferous slash-bum... 

Figure 5. Amazonian tropical rainforest following slash-and-bum activities. Land use activities result in dramatic losses in biological diversity as well as soils and nutrient pools. These losses result in declines in the productive capacity of these forests.

She didn t have time to react as tte knife slashed out again There was a bum of cold on her cheek. Stunned, she put her hand to it, felt the wetness start to run out between her fingers. She boked at her hand, gbssy with her bbod, and then it started to hurt, a clean burning that took her breath away. 

In the chemical sector, the received wisdom is that in their relendess focus on making money, LBO practitioners resort to slash and bum tactics, compromising environmental health and safety. They are sometimes referred to as the bottom fishers looking for a quick flip . In addition, they are often described as financial magicians who turn solid balance sheets into smoke and mirrors. 

Uhl, C. 1987. Factors controlling succession following slash-and-bum agriculture in Amazonia. Journal of Ecology 75 377-407. 

One of the first attempts to study soil nutrient dynamics under cultivated pastures in the Amazon basin was conducted in the early 1970s by Falesi (1976). The results of that chronosequence study in different soil types suggested that soil nutrient cycling in pastures differed from that of the traditional slash-and-bum agriculture. The decline in the levels of some nutrients in the soil was found to be more gradual, and the decline in productivity over time in planted pastures could, at least in part, be associated with the behavior of available phosphorus in the soil. 

Ewel, J., C. Berish, B. Brown, N. Price, and J. Raich. 1981. Slash and bum impacts on a Costa Rican wet forest site. Ecology 62 816-829. 

The soil organic matter of cleared tropical forest contributes substantially to atmosphere CO2 About 25% of organic carbon is lost from forest soils within 12 months of clearance (Miller et d., 1982). When it is considered that a typical forest soil contains over 100 ha of organic matter in the first 30 cm and about the same amount from the 30-100 cm horizon (Klinge, 1976) then it is clear that the potential production of CO2 is very high. Ewell et d. (1981) studied slash and bum technique at a Cost Rican wet forest site. They found that after burning, the forest soil evolved CO2 at such a rate that after 154 days decomposition and respiration as much C would be released into the atmosphere as was released by the burn. 

See also Acid rain Climax (ecological) Slash-and-bum agriculture Sustainable development. 

Tingey DT, Manning M, Grothaus LC, Bums WF (1980) Influence of light and temperature on monoterpene emission rates from slash pine. Plant Physiol 65(5) 797-801 Tisdale RA, Nebeker TE, Hodges JD (2003) The role of oleoresin flow in the induced response of loblolly pine to a southern pine beetle associated fungus. Can J Bot 81 368-374... 

These observations by Quinn the Eskirm pry open the door to many difficult issues involving alpacas, science, and the role of the artist. Sure, my comment that alpacas are a cross between a camel and a llama might slash and bum its way through animal taxonomy, and... 

Castellanos, 1. et al., Slash-and-bum effects on fine root biomass and productivity in a tropical dry forest ecosystem in Mexico, Forest Ecol. Manag., 148, 41, 2001. 

Miller, P.M. and Kaufman, J.B., Effects of slash and bum agriculture on species abundance and composition of a tropical deciduous forest. Forest Ecol. Manag., 103, 191, 1998. 

---