Grassland management regimens influence the structure of archaeal communities in upland pasture soils, which appear to be dominated by as yet uncultivated non-thermophilic Crenarchaeota. In an attempt to determine which grassland management factors select for particular crenarchaeal community structures, soil microcosm experiments were performed examining the effect of increased pH, application...

abstract soil quality evaluation is an essential issue in soil management for agriculture and natural resource protection. soil quality indices are useful tools for determination and comparison of soils quality. using of principle component analysis in this study we selected 6 important properties as a soil quality minimum data set (mds) among 18 soil properties (tds). then, soil quality of agr...

Grassland management regimens influence the structure of archaeal communities in upland pasture soils, which appear to be dominated by as yet uncultivated non-thermophilic Crenarchaeota. In an attempt to determine which grassland management factors select for particular crenarchaeal community structures, soil microcosm experiments were performed examining the effect of increased pH, application...

Land use changes in the Everglades Agricultural Area (EAA) of south Florida may alter microbial activity and organic matter decomposition and ultimately influence the fate of P in soil. The objectives of this study were to determine effects of long-term cultivation and fertilization on microbial activity and P dynamics for contrasting land uses in the EAA. Soils (0-15 cm) under pasture for 100 ...

Areas of S deficiency are still being identified in the Pacific Northwest even though S has been applied to some soils in this region for at least 50 years. Recent studies dealing with the S fertilization of legumes for the Northwest have been conducted by Pumphrey and Moore (1965a, 1965b) in northeastern Oregon; Smith, et al., (1968) in western Montana; Dawson (1969) on pasture legumes in west...

Tall fescue (Festuca arundinacea) is the most important cultivated pasture grass in the USA, occupying over 35 million acres. It is a native of Europe but is of minor importance there. It is not known when tall fescue was first introduced into the USA but it was being tested in several states by the late 1800s (Buckner et al., 1979). However, tall fescue usage remained low until release of the ...

In 2010, the National Organic Program implemented a rule for the US stating that pasture must be a significant source of feed in organic ruminant systems. This article will focus on how the pasture rule has impacted the management, economics and nutritional value of products derived from organic ruminant systems and the interactions of grazing cattle with pasture forages and soils. The use of s...

1993; Parsons et al., 1993; Reiners et al., 1994; Parsons and Keller, 1995). Land use changes, such as deforestation and reforestation, modify Re-establishing trees, especially fast-growing N-fixing not only the organisms inhabiting affected areas, but also abovespecies, in deforested grassland landscapes can reverse and belowground environments. Topography further influences local changes in s...

During pasture grazing, freshly harvested herbage (litterfall) is dropped onto soils from the mouths of dairy cattle, potentially inducing nitrous oxide (NO) emissions. Although the Intergovernmental Panel on Climate Change (IPCC) recommends accounting for NO emissions from arable crop residues in national inventories, emissions from the litterfall of grazed pasture systems are not recognized. ...