This review reveals that crop residues of common cultivated crops are an important resource
not only as a source of significant quantities of nutrients for crop production but also affecting …

Ecosystems across the biosphere are subject to rapid changes in elemental balance and
climatic regimes. A major force structuring ecological responses to these perturbations lies …

This new edition of a bestseller examines plant nutrition's role as one of the most important
limiting factors that must be overcome to optimize food production. Extensively revised and …

Most of the earth's terrestrial species live in the soil. These organisms, which include many
thousands of species of fungi and nematodes, shape aboveground plant and animal life as …

Large mammalian herbivores not only depend on plant communities for their existence but
cause major changes in plant community composition and structure. These changes have …

Ecosystem ecologists traditionally have focused their attention on direct interactions among
species, particularly those interactions that control flows of energy and materials among …

Plains grasslands, North American bison (Bos bison, also known as Bison bison; Jones et
al. 1992) and other large herbivores were abundant and conspicuous components of the …

Divergent views of the influence of livestock grazing on rangeland ecosystems are largely
the result of a narrow focus that compares grazed landscapes to grazing exclosures. Our …

Species diversity has declined in ecosystems worldwide as a result of habitat fragmentation,
eutrophication, and land-use change. If such decline is to be halted ecological mechanisms …

In tallgrass prairie, disturbances such as grazing and fire can generate patchiness across
the landscape, contributing to a shifting mosaic that presumably enhances biodiversity …