Climatic and Topographic Variables Improve Estimation Accuracy of Patula Pine Forest Site Productivity in Southern Mexico

The Southern Pine Beetle and Pine Forest Ecosystems

Dendroctonus frontalis, the southern pine beetle (SPB), is a highly destructive species of bark beetle that inhabits pine forests in the southern United States and parts of Central America. @6D In natural pine forests, the ecological role of the SPB presumably is to hasten the demise of weak or damaged trees, perhaps creating kindling for fires that contribute positively to the long-term health...

Nature of radioactive contamination in soils of the pine forest in the territory adjacent to Semipalatinsk test site

ABSTRACT Background: This work investigated radioactive contamination in soils of the pine forest in the territory adjacent to Semipalatinsk test site. Materials and Methods: Thirty samples from the soil were collected from six different a soil profile was laid out (research areas). Activity concentrations of 137Cs and 241Am were determined using a Canberra GX-2020 solid-state gamma-spectromet...

Accuracy of Local Topographic Variables Derived from Digital Elevation Models

We study the accuracy of data on some local topographic attributes derived from digital elevation models (DEMs). First, we carry out a test for the precision of four methods for calculation of partial derivatives of elevations. We ® nd that the Evans method is the most precision algorithm of this kind. Second, we produce formulae for root mean square errors of four local topographic variables (...

Restoring longleaf pine forest ecosystems in the southern U.S

32.1 Southern forest environment .......................................................................................... ..50 2 32.2 Longleaf pine ecology.. ..................................................................................................... .502 32.2.1 Longleaf pine ecosystems .................................................................................. ..50 2 32.2.2 E...

Forest Herbicide Benefits and Developments for Intensive Southern Pine Culture