Filters: Tags: Soil Science Society (X)
4 results (8ms)
Filters
Date Range
Extensions Types Contacts Categories |
Nutrient availability is an important constraint on sustainable forest productivity, and it is crucial to understand the long-term effects of management practices, including soil scarification, on soil microbial communities because they store and cycle nutrients. In addition, because forests are subject to wildfires, it would be useful to understand potential interactive effects of wildfire and management practice on forest soil ecosystems. We studied the individual and combined effects of soil scarification and a subsequent wildfire on microbial community structure of a ponderosa pine (Pinus ponderosa C. Lawson) forest soil in the central Rocky Mountains. Experimental plots were scarified by rototilling in 1981,...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Soil Science Society,
Soil Science Society of America Journal
Encroachment of pinyon–juniper woodland into rangeland ecosystems is prevalent across the western United States. Mechanisms associated with this successful encroachment are speculative, but probably, in part, involve the effective use of water resources. We explored the ecohydrological characteristics of a two-needle pinyon pine (Pinus edulis Engelm.)–Utah juniper [Juniperus osteosperma (Torr.) Little] woodland on the Colorado Plateau in Utah. We have discovered that a high level of natural soil water repellency or hydrophobicity exists under the canopies of both pinyon and juniper species. We found, following summer precipitation events, that soil water repellency under trees concentrated the soil water below...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Soil Science Society,
Soil Science Society of America Journal
Invasive annual cheatgrass (Bromus tectorum L.) and medusahead wildrye [Taeniatherum caput-medusae (L.) Nevski ssp. asperum (Simonk.) Melderis] have decreased livestock productivity and biological diversity and increased the frequency of wildfire on rangelands in the western United States. On disturbed sites, squirreltail (Elymus sp.), a short-lived North American perennial, appears to compete against invasive exotic annuals when available soil N and nitrification are reduced. We tested the hypothesis that differences in N uptake activity could account for this phenomenon. North American seedlings of perennial bluebunch wheatgrass [Pseudoroegneria spicata (Pursh) �. Löve], four populations of squirreltail, and...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Soil Science Society,
Soil Science Society of America Journal
Encroachment of pinyon?juniper woodland into rangeland ecosystems is prevalent across the western United States. Mechanisms associated with this successful encroachment are speculative, but probably, in part, involve the effective use of water resources. We explored the ecohydrological characteristics of a two-needle pinyon pine (Pinus edulis Engelm.)?Utah juniper [Juniperus osteosperma (Torr.) Little] woodland on the Colorado Plateau in Utah. We have discovered that a high level of natural soil water repellency or hydrophobicity exists under the canopies of both pinyon and juniper species. We found, following summer precipitation events, that soil water repellency under trees concentrated the soil water below the...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Soil Science Society,
Soil Science Society of America Journal
|