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| 1 | POLYMER CHARGE AND MOLECULAR WEIGHT EFFECTS ON TREATED IRRIGATION FURROW PROCESSES显示文摘Application of 5-10 mg L-1 water soluble anionic polyacrylamide (PAM) to furrow irrigation water during flow advance substantially reduces sediment loss and increases net infiltration. We hypothesized that PAM_s solvated molecular conformation influences its irrigation-management efficacy. The study was conducted in Kimberly, Idaho, on Portneuf silt loam (Durinodic Xeric Haplocalcids), under furrowirrigated beans (Phaseolus vulgaris ) at a 1.5% slope. Polyacrylamides with contrasting molecular weight (anionic; 4-7, 12- 15 and 14-17 MDa, i.e. Mg mol-1 ), charge type (neutral, anionic, cationic), and charge density (8, 19, 35 mol %) were tested in two studies. Inflow rate was 23 L min-1 during furrow advance, and 15 L min-1 for the remaining set. Anionic and neutral PAMs were twice as effective as cationic PAMs for controlling sediment loss in new furrows. The order of effectiveness for overall soilloss control was : anionic >neutral >cationic PAM, and efficacy increased with increasing charge density and/or molecular weight. Net furrow infiltration increased by 14 to 19% when PAM treatment molecular weight was reduced from 17 to 4 MDa. General trends suggested that medium and high charge density anionic and neutral PAM produced the greatest increase in infiltration compared with controls.Compared with untreated furrows, neutral PAM gave the greatest season-long net infiltration gains (5%),while charged PAMs tended to increase net infiltration early in the season on new furrows but decreased infiltration on repeat-irrigated furrows later in the season. | R. D. Lentz(USDA-ARS, Northwest Irrigation and Soils Research Laboratory, Kimberly, ID)R. E. Sojka (Landcare Research, New Zealand, Ltd, Palmerston North, New ZealandNote: The manucript of this paper was received in March 1999, Discussion open until March | 2000 | International Journal of Sediment Research2000，15，1： | 13 |
| 2 | Effervescent atomization显示文摘 | Sovani S D Sojka P E Lefbvre A H | 2001 | Progress in Energy and Combustion Science2001，27，4： | 1 |
| 3 | Freezing effects on aggregate stability affected by texture, mineralogy, and organic matter显示文摘 | Lehrsch G A Sojka R E Carter D L | 1991 | Soil Science Society of America Journal1991，55，： | 1 |
| 4 | Effervescent atomization of viscoelastic liquids: experiment and modeling显示文摘 | Geckler S C Sojka P E | 2008 | Journal of Fluids Engineering-Transactions of the ASME2008，，： | 1 |
| 5 | The blood donation experience:self-reported motives and obstacles for donating blood显示文摘 | Sojka BN Sojka P | 2008 | Vox Sang2008，94，： | 1 |
| 6 | Spatial droplet velocity and size profile in effervescent atomizer-produced spray显示文摘 | Panchagnula M V Sojka P E | 1999 | Fuel1999，78，6： | 1 |
| 7 | PAM effect on infiltration in irrigated agriculture 显示文摘 | Sojka R E Lentz R D Rose C W | 1998 | Soil Water Conserv1998，，53： | 1 |
| 8 | Polyacrylamide in agriculture and environmental land management 显示文摘 | Sojka R E Bjorneberg D L Entry J A | 2007 | Advances in Agronomy2007，92，： | 1 |
| 9 | Field results using polyacrylamide to manage furrow erosion and infiltration 显示文摘 | LENTZ R D SOJKA R E | 1994 | Soil Science1994，158，： | 1 |
| 10 | Effervescent Atomization at Injection Pressures in MPa Range显示文摘 | WADE R A WEERTS J M SOJKA P E | 1999 | Atomization Sprays1999，9，6： | 1 |
| 11 | Effervescent atomization显示文摘 | S.D Sovani P.E Sojka A.H Lefebvre | 2001 | Progress in Energy and Combustion Science2001，，4： | 1 |
| 12 | Playing ice hockey and basketball increase serum levels of s-100B in elite players:a pilot study显示文摘 | STANACKE BM TEGNER Y SOJKA P | 2003 | Clin J Sport Med2003，13，5： | 1 |
| 13 | Furrow irrigation water quality effects on soil loss and infiltration 显示文摘 | LENTZ R D SOJKA R E CARTER D L | 1996 | Soil Science Society of America Journal1996，60，： | 1 |
| 14 | Modeling drop size distributions显示文摘 | Babinsky E Sojka P E | 2002 | Prog Energy Combust Sci2002，28，4： | 1 |
| 15 | A Holographic Investigation of the Near-Nozzle Structure of an Effervescent Atomizer-Produced Spray 显示文摘 | Santangelo P J Sojka P E | 1995 | Atom Sprays1995，5，： | 1 |
| 16 | Carbon and nitrogen stable isotope ratios can estimate anionic polyacrylamide degradation in soil显示文摘 | Entry J A Sojka R E Hcks B H | 2008 | Geoderma2008，145，： | 1 |
| 17 | Field Results Using Polyacrylamide to Manage Furrow Erosion and Infiltration显示文摘 | LENTZ R D SOJKA R E | 1994 | Soil Science1994，158，4： | 1 |
| 18 | Bag breakup of low viscosity drops in the presence of a continuous air jet显示文摘 | KULKARNIV SOJKA P E | 2014 | Physics of Fluids2014，26，07： | 1 |
| 19 | Hydrophobic sodium fluoride-based nanocrystals doped with lanthanide ions:assessm- ent of in vitro toxicity to human blood lymphocytes and phagocytes 显示文摘 | Sojka B Kuricova M Liskova A | 2014 | J Appl Toxicol2014，34，11： | 1 |
| 20 | Time for yet another look at soilconditioners显示文摘 | Sojka R E Lentz R D | 1994 | Soil Science1994，158，4： | 1 |
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