5,585 research outputs found
Soil compaction and plant performance of forage crops
No full textSIGLEAvailable from British Library Document Supply Centre- DSC:D86912 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Allelopathic effects of artemisia monosperma del. Ongermination and seedling growth of some range plant species
No full textArtemisia monosperma is observed to be as one of the first species todominate disturbed sand dunes in Saudi Arabia. Despite of its importance as asand stabilizer, it has no forage value. It is feared that this species may arrest thenatural succession of vegetation. A series of controlled environment experimentswas conducted to study the potential allelopathic effects of A. monosperma ongermination and seedling growth and survival of some species of sandy habitat(Lasiurus scindicus, Pennesetum divisum, Scrophularia hypericifolia, andPlantago boissieri). In one experiment, seeds were germinated in aqueousextracts prepared from leaves and inflorescence at a ratio of I: 10 weight tovolume. Seeds were also germinated in a polyethylene glycol solution having anosmotic potential similar to that of extracts and in distilled water for comparison.In a second experiment, seeds were sown in IO-cm pots filled with sand andcovered with a layer ofO, 1,2 or 3g ground foliage (leaves and inflorescence) tosimulate the effect of litter leachate on seedling growth and survival. In a thirdexperiment, the effect of root exudates on seedling growth and survival wasstudied by irrigating recipient plants with either tap water (control) or leachatesfrom intact one-year old A. monosperma plants grown in warm (30°C) or cool(20°C) temperatures. Results indicated that seed germination (except in S.hypericifolia) was partially controlled by the osmotic potential of extracts. Theaqueous extracts were not significantly different in their effect on germination.The impact on germination ranged between 50-60% reduction in L. scindicus to acomplete germination inhibition in S. hypericifolia and P. biossieri. Addition ofA. monosperma litter to soil surface decreased seedling relative growth rate(RGR) and survival in proportion to the amount of litter added. Artemisiamonosperma root exudates did not affect seedling biomass but reduced root toshoot ratio regardless of temperature, reduced RGR under warm temperature anddecreased seedling survival especially in S. hypericifolia where complete seedlingdeath occurred irrespective of temperature. These results have some practicalimportance when selecting for species in revegetation programs inA.monosperma- dominated sandy areas
Group living homes for older people with dementia: Concept and effects
No full textEefsting, J.A. [Promotor]Pot, A.M. [Promotor]Depla, M.F.I.A. [Copromotor]Lange, J. de [Copromotor
Cementbetonnen plaatbekledingen op oevers en dijken, bundeling van artikelen uit de vakpers 1990-1991
No full textCUR; Proefproject: Open colloidaal beton a/s dijkbekleding; PT civiele techniek, april 1990. Burger, A.M., Eversdijk, P.J. en Hendriksma, A.M.; Open cementbeton toegepast a/s bekleding voor dijken; Zeewering Breskens, proefproject voor colloidaal beton; Land + Water, mei 1990. Burger, A.M., Eversdijk, P.J. en Hendriksma, A.M.; Colloidaal beton weerstaat zware storm en hoge golven; De praktijk van open cementbeton a/s Plaatbekleding; Land + Water, juni 1990. CUR; Cementbetonnen plaatbekledingen op dijken; Proefprojecten CUR; Civiele Techniek, No4, 1990. Vrieze, C.G. de; Betonnen dijken, groen a/s gras; Proeven met colloidaal beton voor begroeide rivierdijken; Land + Water No.6, juni 1991. Eversdijk, P.J. en Fase, A.G.; Breuksteen met colloidaal beton pakt rivierdijken goed in; Proefproject Opijnen in Julianakanaal; Land + Water No. 7/8, augustus 1991. Rijke, W.G. de en Burger, A.M.; Cementbetonnen plaatbekledingen op dijken en oevers; Praktische ontwerpmethode (1); Civiele Techniek, jaargang 46, No.3, 1991. Rijke, W.G. de en Burger, A.M.; Cementbetonnen plaatbekledingen op dijken en oevers theoretisch waterdicht; Praktische ontwerpmethode (2); Civiele Techniek, jaargang 46, No.4, 1991. CUR; oemonstratieproject open colloidaal beton Noordoostpolder; Civiele Techniek, No.3, 1991
IoWoman, March/April 2004, Vol.34, no.2
No full textNewsletter for the Iowa Commission on the Status of Wome
IoWoman, March/April 2004, Vol. 34, no. 2
No full textNewsletter for the Iowa Commission on the Status of Wome
Gauge Fields and Strings
No full textBased on his own work, the author synthesizes the most promising approaches and ideals in field theory today. He presents such subjects as statistical mechanics, quantum field theory and their interrelation, continuous global symmetry, non-Abelian gauge fields, instantons and the quantam theory of loops, and quantum strings and random surfaces. This book is aimed at postgraduate students studying field theory and statistical mechanics, and for research workers in continuous global theory
The Sphinx Between the First and Second Pyramids. From a Photograph Taken by the Author about 6 a.m., After Sleeping at the Foot of the Sphinx.
No full textCaption: "The Sphinx Between the First and Second Pyramids.From a photograph taken by the Author about 6 A.M., after sleeping at the foot of the Sphinx."The Great Sphinx with two pyramids behind. Black-and-white photograph
Common Book Author Visit Highlights Spring Programming
No full textCommon Book author William Kamkwamba will visit campus on April 3 at 11 a.m. in Richardson Ballroom. All events are free and have cultural event status
Author of \u27The Soloist\u27 to Speak
No full textSteve Lopez, author of The Soloist, will speak at 9:30 a.m., Thursday, November 5, in Polsky Theatre as part of the JCCC scholar in residence program
- …
