Journal ArticleDOI
The Mineralogy, Chemistry, and Physics of Tropical Soils With Variable Charge Clays
D. K. Cassel,Donald R. Nielsen +1 more
TLDR
In this paper, the mineralogy, chemistry, and physics of variable charge minerals and soil organic matter are described in the tropical soil systems of North Carolina State University (NCSU).Abstract:
This book is the culmination of an effort started in 1974 when the senior author started assembling information for a tropical soils course that he taught while on sabbatical leave at North Carolina State University. The literature cited throughout the book was current when the book went to press.
Soil systems contain mineral and organic materials that have constant or permanent surface charges, such as montmorillonite, or constant surface potentials, usually referred to as variable charge materials. Most soil systems contain some of both kinds. In the tropics, most of the minerals with permanent charge have been severely weathered. Consequently, the surface charge of the remaining material results from adsorption of potential determining ions. This book treats the mineralogy, chemistry, and physics of the variable charge minerals and soil organic matter.read more
Citations
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Journal ArticleDOI
Nitrogen limitation on land and in the sea: How can it occur?
TL;DR: In this paper, the authors examine both how the biogeochemistry of the nitrogen cycle could cause limitation to develop, and how nitrogen limitation could persist as a consequence of processes that prevent or reduce nitrogen fixation.
Book
Principles of Terrestrial Ecosystem Ecology
TL;DR: In this paper, the Ecosystem Concept is used to describe the Earth's Climate System and Geology and Soils, and the ecosystem concept is used for managing and sustaining ecosystems.
Journal ArticleDOI
Terrestrial phosphorus limitation: mechanisms, implications, and nitrogen–phosphorus interactions
TL;DR: It is suggested that depletion, soil barriers, and low-P parent material often cause ultimate limitation because they control the ecosystem mass balance of P and cause it to be an ultimate limiting nutrient.
Book ChapterDOI
Regional nitrogen budgets and riverine N & P fluxes for the drainages to the North Atlantic Ocean: Natural and human influences
Robert W. Howarth,Gilles Billen,Dennis P. Swaney,Andrea K. Townsend,Norbert A. Jaworski,Kate Lajtha,John A. Downing,Ragnar Elmgren,Nina F. Caraco,Teresa Jordan,Frank Berendse,Jean Freney,V. N. Kudeyarov,Peter S. Murdoch,Zhao-Liang Z.-L. Zhu +14 more
TL;DR: In this paper, the authors present estimates of total nitrogen and total phosphorus fluxes in rivers to the North Atlantic Ocean from 14 regions in North America, South America, Europe, and Africa which collectively comprise the drainage basins to North Atlantic.
Journal ArticleDOI
Stabilization and destabilization of soil organic matter: mechanisms and controls
TL;DR: In this article, a conceptual model of the processes by which plant leaf and root litter is transformed to soil organic C and CO 2 is presented, which is viewed as resulting from three general sets of characteristics.
References
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Journal ArticleDOI
Nitrogen limitation on land and in the sea: How can it occur?
TL;DR: In this paper, the authors examine both how the biogeochemistry of the nitrogen cycle could cause limitation to develop, and how nitrogen limitation could persist as a consequence of processes that prevent or reduce nitrogen fixation.
Book
Principles of Terrestrial Ecosystem Ecology
TL;DR: In this paper, the Ecosystem Concept is used to describe the Earth's Climate System and Geology and Soils, and the ecosystem concept is used for managing and sustaining ecosystems.
Journal ArticleDOI
Terrestrial phosphorus limitation: mechanisms, implications, and nitrogen–phosphorus interactions
TL;DR: It is suggested that depletion, soil barriers, and low-P parent material often cause ultimate limitation because they control the ecosystem mass balance of P and cause it to be an ultimate limiting nutrient.
Journal ArticleDOI
Stabilization and destabilization of soil organic matter: mechanisms and controls
TL;DR: In this article, a conceptual model of the processes by which plant leaf and root litter is transformed to soil organic C and CO 2 is presented, which is viewed as resulting from three general sets of characteristics.
Journal ArticleDOI
Natural oxidation of black carbon in soils: Changes in molecular form and surface charge along a climosequence
TL;DR: In this paper, the authors investigated changes in molecular form and surface charge of black carbon (BC) due to long-term natural oxidation and examined how climatic and soil factors affect BC oxidation.