Soil Heating, Nitrogen, Cheatgrass, and Seedbed Microsites
نویسندگان
چکیده
منابع مشابه
Evidence that Invasion by Cheatgrass Alters Soil Nitrogen Availability
We hypothesized that cheatgrass (Bromus tectorum), an exotic invasive annual, may alter soil nitrogen availability. In the Honey Lake Valley of northeastern, California, we have monitored soil and vegetation along a chronosequence of cheatgrass invasion. In 2007, we measured total C, total N, and N in tissue of cheatgrass, winterfat (Krascheninnikovia lanata), freckled milkvetch (Astragalus len...
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straw intercepted drop impact energy or surface applied powdered phospho-gypsum reduced aggregate disperSeedling emergence is the crucial first step in crop establishment; sion the infiltration rate decreased more gradually, rehowever, crops frequently must penetrate or lift a thin, dense, soil quiring approximately 45 min to reach 10 mm h 1, comlayer called a crust, which is formed by drop imp...
متن کاملStrip-tillage effect on seedbed soil temperature and other soil physical properties
The no-tillage system is perceived as having lower soil temperatures, wetter soil conditions, and greater surface penetration resistance compared with conventional and other conservation tillage systems. Concerns associated with the effect of the no-tillage system on certain soil physical properties (i.e. soil temperature, moisture, and compaction) prompted this study to evaluate the effect of ...
متن کاملSoil Microsites as a Source of Denitrification Variability
The spatial variability exhibited by soil denitriflcation rates is high. As is typical for natural denitriflcation rate measurements, the individual rates of most samples of a given data set are low; however, a few samples often exhibit extremely high rates. Such data are characterized by highly skewed sample frequency distributions. This study was initiated to investigate the underlying mechan...
متن کاملShort-term response of soil bacteria to carbon enrichment in different soil microsites.
The response of bacteria in bulk soil and earthworm casts to carbon enrichment was studied by an RNA stable-isotope probing/terminal restriction fragment length polymorphism strategy with (13)C-labeled glucose and acetate. Both the soil microsite status and the carbon enrichment selected rapidly for different active bacterial communities, which resulted in different degradation kinetics. Our st...
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ژورنال
عنوان ژورنال: Journal of Range Management
سال: 1994
ISSN: 0022-409X
DOI: 10.2307/4002837