Soil Science Society of America (SSSA)
31 Articles found
Soil Science Society of America (SSSA) articles
Turf quality (TQ) decline due to drought is a major concern in cool-season turfgrass management. The study was conducted to examine whether selected Texas (TBG) x Kentucky bluegrass (KBG) hybrids (HBGs) (Poa arachnifera Torr. x P. pratensis L.) exhibit improved drought stress tolerance and recuperative ability in comparison to commonly-used KBG (P. pratensis) genotypes. Plant material included two HBG selections (HBG568 and HBG668), two commercially-available HBGs (‘Thermal Blue’ and ‘Band
Jan. 1, 2010
Bingru Huang, Emily Merewitz, William Meyer, Stacy Bonos
Different irrigation methods in wheat (Triticum aestivum L.) result in different water and nutrient use efficiencies and, ultimately, plant growth. A field experiment was conducted during the 2006–2007 and 2007–2008 crop cycles to investigate the effects of furrow irrigated raised bed planting and the effects of flood irrigated conventional planting on growth and productivity in winter wheat. In Zadoks Stages 5–31, wheat that was grown in raised bed planting suffered from a lower soil temp
Jan. 1, 2010
Ling`an Kong, Fahong Wang, Bo Feng, Shengdong Li, Jisheng Si and Bin Zhang
Maximum diurnal accumulation of soluble carbohydrates in warm-season grasses is an economic way of increasing hay quality; however, in the humid East, haymaking is difficult. This study evaluated gamagrass (Tripsacum dactyloides L.), topdressed with either 56 (LO) or 168 (HI) kg N ha–1, direct baled after mowing in the afternoon (PM/LO and PM/HI) or morning (AM/LO and AM/HI), wrapped with plastic film, and conserved as baleage. The four baleage treatments were evaluated by steers for dry matte
Dec. 30, 2009
J. C. Burns, A. K. Sauvé, G. B. Huntington, C. S. Whisnant
Epidermal conductance (g.min) is a measurement of water loss through the cuticle and stomata when stomatal conductance is minimal. Two pot experiments were conducted to evaluate genotypic variation in gmin for 10 to 12 rice cultivars (Oryza spp.) grown under flooded conditions. Epidermal conductance was estimated by measuring loss of water from the excised topmost fully-expanded leaves. Considerable genotypic variation in gmin was found. Two O. glaberrima cultivars had lowe
Dec. 30, 2009
Kazuki Saito, Koichi Futakuchi
Received for publication November 3, 2008. Although land application of swine (Sus scrofa) manure lagoon effluent is a common and effective method of disposal, the presence of antibiotic-resistant bacteria, both pathogenic and commensal can complicate already understood issues associated with its safe disposal. The aim of this study was to assess antibiotic resistance in swine lagoon bacteria from sow, nursery, and finisher farms in the southeastern United States. Effluents from 37 lagoons were
Dec. 1, 2009
J. P. Brooks, M. R. McLaughlin
Coffee (Coffea spp.) is one of the world`s most valuable agricultural export commodities produced by small-scale farmers. Its germplasm, which holds useful traits for crop improvement, has traditionally been conserved in field genebanks, which presents many challenges for conservation. New techniques of in vitro and cryopreservation have been developed to improve the long-term conservation of coffee. But a question remains as to whether these new techniques are more cost effective than field col
Oct. 22, 2009
M. E. Dulloo, A. W. Ebert, S. Dussert, E. Gotor, C. Astorga, N. Vasquez, J. J. Rakotomalala, A. Rabemiafara, M. Eira, B. Bellachew, C. Omondi, F. Engelmann, F. Anthony, J. Watts, Z. Qamar and L. Snook
Zoysiagrasses (Zoysia spp.) are widely adapted and highly variable; however, information is lacking regarding the heritability and potential for improvement of numerous performance characteristics. Three individual replicated field studies, which included 90 very fine, 108 fine, and 126 coarse-textured zoysiagrass genotypes, respectively, were conducted near Gainesville, FL, to determine the response and broad-sense heritabilities of 10 turfgrass performance and stress-related characteristics. G
Oct. 22, 2009
Kevin E. Kenworthy, Brian M. Schwartz, M. C. Engelke, A. Dennis Genovesi and Kenneth H. Quesenberry
Brown patch disease, caused by Rhizoctonia solani Kühn, is one of the most devastating fungal pathogens that occur on tall fescue [Lolium arundinaceum (Schreb.) Darbysh. = Schedonorus arundinaceus (Schreb.) Dumort]. The development of genetic resistance to brown patch would provide the most effective long term control to this disease; however, the genetic mechanism of brown patch resistance in tall fescue is not known. For this study, a diallel cross involving six parents was conducted to inves
Oct. 22, 2009
Jonathan M. Bokmeyer, Stacy A. Bonos and William A. Meyer
Cassava (Manihot esculenta Crantz) is commonly grown on residual moisture after rice (Oryza sativa L.) in inland valley swamps (IVS), but not much work has been done to select genotypes that could bulk early, and have high storage root yield in the IVS. Earlier improvement work focused on development of varieties adapted to upland conditions (12-mo cycle), but recently farmers are requesting varieties that can mature early (6-mo cycle) and are adapted to the IVS. The choice of the IVS is to be a
Aug. 31, 2009
Richardson U. Okechukwu and Alfred G. O. Dixon
Heterosis in maize (Zea mays L.) confers stress tolerance. To better understand the physiological mechanisms underlying the differential response of a maize hybrid (CG60 x MBS1236) and its parental inbred lines to shading stress, studies were conducted in a field hydroponic system in Ontario, Canada, from 2004 to 2006. Shading stress consisted of a 55% reduction in incident solar radiation and was implemented either for a 30- to 33-d period before silking starting at the 7-leaf tip stage, a 21-d
Aug. 7, 2009
Matthijs Tollenaar and Weidong Liu