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| 1 | The effect of total carbon on microscopic soil properties and implications for crop production显示文摘Soil structure is a dynamic property affected by physical, chemical, and microbiological processes. Addition of organic matter to soils and the use of different management practices have been reported to impact soil structure and crop production. Moderation in soil temperature and increases in microbial activity and soil water retention are often suggested as reasons for the rise in crop yield when organic matter is added to the soil. Less is known about the direct effect of changes in soil structure on crop production. A field experiment was conducted to study the effect of summer cover crop and in-season management system on soil structure. The experiment was a nested design with summer cover crop as the main plot and management system as the subplot. Summer cover crop treatments included cowpea (Vigna unguiculata L. Walp.) incorporated into the soil in the fall (CI), cowpea used as mulch in the fall (CM), sudangrass (Sorghum vulgare) incorporated into the soil in the fall (S), and dry fallow or bare ground (B). Management systems were organic (ORG) and conventional (CNV) systems. Lettuce (Lactuca sativa L.) and cantaloupes (Cucumis melo L.) were cultivated in rotation in the plots for three consecutive years using the same cover crops and management systems for each plot. Disturbed and undisturbed soil cores were collected at the end of the third year and used for laboratory experiments to measure physical, chemical, and hydraulic properties. Image analysis was used to quantify soil structure properties using a scanning electron microscope on thin sections prepared from the undisturbed soil cores. We found that total soil carbon was correlated with porosity, saturation percentage, and pore roughness. Pore roughness was correlated with crop production in general and with marketable production in particular. We found that the higher the complexity of the pore space, the more water retained in the soil, which may increase soil water residence and reduce plant water stress. | Inma LEBRON Milton Earl MCGIFFEN Jr Donald Louis SUAREZ | 2012 | Journal of Arid Land2012，4，3： | 4 |
| 2 | Analysis of FimX, a phosphodiesterase that governs twitching motility in Pseudomonas aeruginosa 显示文摘 | Kazmierczak B I Lebron M B Murray T S | 2006 | Mol Microbiol2006，60，4： | 1 |
| 3 | MLK3 regu- lates fMLP-stimulated neutrophil motility显示文摘 | POLESSKAYA O WONG C LEBRON L | 2014 | Molecular Immunol- ogy2014，58，2： | 1 |
| 4 | Can a computed tomography scoring system predict the need for surgery in small -bowel obstruction? 显示文摘 | Jones K Mangram A J Lebron R A | 2007 | AmJSurg2007，194，6： | 1 |
| 5 | Crystal structure of the hemochromatosis protein HFE and characterization of its interaction with transferrin receptor显示文摘 | Lebron JA Bennett MJ Vaughn DE | 1998 | Cell1998，93，1： | 1 |
| 6 | MLK3 regu- lates fMLP-stimulated neutrophil motility显示文摘 | POLESSKAYA O WONG C LEBRON L et ol | 2014 | Molecular Immunol- ogy2014，58，2： | 1 |
| 7 | Transmission range control in muhihop packet radio networks, communications 显示文摘 | LEBRON H | 1996 | IEEE Transactions on Communications1996，34，1： | 1 |
| 8 | Kinetics and mechanisms of precipitation of calcite as affected by pCO2 and organic ligands at 25℃显示文摘 | Lebron I Suarez D L | 1998 | Geochimica et Cosmochimica Acta1998，62，3： | 1 |
| 9 | Regulation of MDMX nuclear import and degradation by Chk2 and 14-3-3 显示文摘 | LeBron C Chen L Gilkes DM | 2006 | EMBO J2006，2225，6： | 1 |
| 10 | A comparison of weekend - weekday ozone and hy- drocarbon concentrations in the Baltimore - Washington metropol- itan area 显示文摘 | LEBRON F | 1975 | Atmos Environ1975，9，： | 1 |
| 11 | MLK3 regulates fMLP-stimulated neutrophil motility 显示文摘 | Polesskaya 0 Wong C Lebron L | 2014 | Mol Immunol2014，58，2： | 1 |
| 12 | The benefits of electromagnetically launching aircraft显示文摘 | Doyle M Sulish G Lebron L | 2000 | Naval Engineering Journal2000，112，3： | 1 |
| 13 | The benefits of electromagnetically launching aircraft显示文摘 | Doyle M Sulish G Lebron L | 2000 | Naval Engineering Journal2000，112，3： | 1 |
| 14 | The benefits of electromagnetically launching aircraft显示文摘 | Doyle M Sulish G Lebron L | 2000 | Naval Engineers Journal2000，112，3： | 1 |
| 15 | Analysis of FimX, a phosphodiesterase that governs twitching motility in Pseudo- monas aeruginosa显示文摘 | KAZMIERC ZAK B I LEBRON M B MURRAY T S | 2006 | Mot Microbiol2006，60，4： | 1 |
| 16 | Regulation of MDMX nuclear in port and degradation by chk2 and 14 - 3 - 3 显示文摘 | Lebron C Chen L | 2006 | EMBOJ2006，25，6： | 1 |
| 17 | Saturated hydraulic conductivity predication from microscopic pore geometry measurements and networks analysis显示文摘 | Lebron L M G Schaap D L | 1999 | WRR1999，35，10： | 1 |
| 18 | The hemochromatosis protein HFE competes with transiferrin for binding to the transferrin receptor显示文摘 | Lebron JA West AP Jr Bjorkman PJ | 1999 | J Mol Biol1999，294，2： | 1 |
| 19 | Gypsum effect on the aggregate size and geometry of three sodic soils under reclamation显示文摘 | Lebron I Suarcz D L Yoshida T | 2002 | Soil Science Society of America Journal2002，66，1： | 1 |
| 20 | Risk factors for renal dysfunction in the postoperative course of liver transplant 显示文摘 | Lebron GM Herrera GM Seller PG | 2004 | Liver Transpl2004，10，： | 1 |
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