Crop growth of winter rye (Secale cereale) was simulated on sandy soils in northwest Germany at the meso-scale (6 km2 catchment, 5 year rotation). Based on site-specific soil data, simulated grain yields (YMOD) were compared to observed yields OBS and the results were discussed with respect to the N balance. The mean annual yields simulated for rain-fed (3.8–7.3 t/ha) and irrigated conditions (...

abstract to study the effects of sewage sludge on tomato seedling growth, a series of pot experiments, each pot containing 17 kg soil, were conducted in a randomized complete design with eight replications. treatments used were: 5 levels of sewage sludge (5, 10, 20, 30 and 40 tons/ha) and two control treatments (t1, without sewage sludge and t2, sewage sludge + complete fertilizers). analysis o...

The role of vegetation in mitigating the effects of PM(10) pollution has been highlighted as one potential benefit of urban greenspace. An integrated modelling approach is presented which utilises air dispersion (ADMS-Urban) and particulate interception (UFORE) to predict the PM(10) concentrations both before and after greenspace establishment, using a 10 x 10 km area of East London Green Grid ...

En la región Norte Centro de México en el potencial rendimiento grano maíz (Zea mays L.) riego es más 10 t ha-1. Actualmente se cultivan alrededor 80 000 ha estas condiciones, con rendimientos promedio superiores a 5 Raramente alcanza debido escasez agua y, ocasiones, mala elección semilla para siembra. Como estrategia lograr altos niveles producción región, propuesto uso híbridos precoces e in...

risk assessment of soil erosion, one of the most important land degradation problems worldwide, is very essential for land and water resources management, and development of soil conservation methods. in the present study, the temporal changes of soil erosion risk were assessed from 1987 to 2010, based on the revised universal soil loss equation (rusle) using remote sensing (rs) and geographic ...

sweet sorghum that is adapted to the country hot and dry climatic condition, was selected as a raw material for biofuel and biogas production. bioethanol is produced from sweet sorghum stalks and grains and biogas is produced from its byproducts. the purpose of this study was to plant sweet sorghum irrigated with different qualities of water in order to produce biofuels. this experiment was con...

Unprimed T cells transferred to heavily irradiated H-2-compatible mice cause a high incidence of lethal graft-vs.-host disease (GVHD)a in certain strain combinations (1-3). GVHD in this setting is a consequence of mature post-thymic donor T cells responding to the multiple minor histocompatibility antigen (minor HA) differences of the host. With the combination of CBA and B10.BR (both H-2~), do...

OBJECTIVE To study the effect of hyaluronic acid (HA) on local anaesthetic chondrotoxicity in vitro. METHODS Chondrocytes were harvested from bovine femoral condyle cartilage and isolated using collagenase-containing media. At 24 hours after seeding 15 000 cells per well onto a 96-well plate, chondrocytes were treated with media (DMEM/F12 + ITS), PBS, 1:1 lidocaine (2%):PBS, 1:1 bupivacaine (...

OBJECTIVE Dental caries is an infectious disease that can be prevented in several ways. The aim of this study was to compare the efficacy of sodium fluoride mouthrinse and nano- hydroxyapatite (nano-HA) for the remineralization of incipient caries. MATERIALS AND METHODS After obtaining different concentrations of nano-HA (0-2-5-10%), 60 sound premolars fixed in acrylic blocks were coated with...

Miscanthus× giganteus, a perennial rhizomatous grass commercially used as a biofuel crop was grown in a field experiment on a silty clay loam soil for 14 years. There were 3 rates of fertilizer nitrogen (N), none (control), 60 kgNha−1 yr−1 and 120kgNha−1 yr−1 as cumulative applications. The crop was harvested in winter and dry matter yield measured. N did not influence yield. Yield, which incre...