Experiments to document the long-term effects of clipping management on N requirements, soil organic carbon (SOC), and soil organic nitrogen (SON) are difficult and costly and therefore few. The CENTURY ecosystem model offers an opportunity to study long-term effects of turfgrass clipping management on biomass production, N requirements, SOC and SON, and N leaching through computer simulation. ...

Perennial ryegrass (Lolium perenne L.) is a widely used cool-season grass species as turf and forage. In order to use biotechnological approaches to improve the species, factors affecting tissue culture responses of mature caryopses of perennial ryegrass were studied. Callus induction and regeneration from mature caryopses of thirteen recentlyreleased turf-type perennial ryegrass cultivars were...

Tall fescue (Schedonorus arundinaceus (Schreb.) Dumort.) is often managed with a cutting height ranging from 70 to 100 mm in ornamental lawns. Some autonomous mowers have been specifically designed maintain mowing the same range. Generally, operate by following random trajectories, and substantial overlapping needed obtain full coverage of working area. In case tall grass, this may cause lodgin...

There are methods to increase fertilizer nitrogen use efficiency through optical sensor-based nitrogen application; however, the sensors are expensive and cost prohibitive to farmers in the developing world. This study evaluated a novel, reduced cost, prototype, and optical sensor to determine if it could be used with the same level of accuracy as a commercial sensor. The stability of the proto...

An extensive number of enterprises are located on the territory Central Ciscaucasia and Caucasus. Emissions from these industrial facilities enter atmosphere, settle soil, drain into reservoirs. Among main pollutants is heavy metal nickel (Ni). Nickel at same time a vital chemical element, and, time, it can act as toxicant that cause mutations. Its biological role depends concentration in soil....

The goal of this study was to identify the zoysiagrass rust pathogens and analyze differences in rust-resistant rust-susceptible Zoysia japonica germplasm upon inoculation. Based on assessment spore morphology 18S ribosomal DNA (rDNA) molecular identification, pathogen identified as Puccinia zoysiae Diet. development mycelium, rate spreading, timing production were more delayed (RR) genotype th...

Across the US Coastal Plain, native grasses and legumes may provide viable alternatives to monoculture pastures of introduced sod‐forming grasses, which require recurring costly inputs. Some available cultivars mostly from neighboring regions, have potential combine forage production for grazing livestock with enhanced habitat, especially grassland birds. A few legume species enhance ecosystem ...

Hot springs panic grass, Dichanthelium lanuginosum var sericeum (Schmoll), successfully colonizes geo-thermally heated soils that are subject to chronic temperatures ranging from 40 to 50 1C, occurs at altitudes in excess of 2500m, and tolerates low soil moisture content for extended periods of time. We utilized superoxide dismutase (SOD; EC 1.15.1.1) as an indicator of oxidative stress respons...

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 ...