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- Author:
- John D. Williams, et al. ; Dan S. Long; Judit Barroso; Kathleen M. Painter; Catherine L. Reardon; Show all 5 Authors
- Source:
- Agrosystems, geosciences & environment 2022 v.5 no.1 pp. e20251
- ISSN:
- 2639-6696
- Subject:
- Brassica napus; Hordeum vulgare; Triticum aestivum; canola; conventional tillage; environment; fallow; field experimentation; income; reduced tillage; spring; spring barley; spring wheat; winter wheat
- Abstract:
- ... Some producers in the inland Pacific Northwest (PNW) are interested in diversifying the traditional 2‐yr sequence of winter wheat (Triticum aestivum L.) (WW)–summer fallow (SF) with oilseed crops to capture break crop effects. The objective of this study was to compare production costs and economic returns of 2‐yr sequences with those of intensified 3‐yr sequences at a low‐precipitation (<300 mm) ...
- Handle:
- 10113/7800841
- DOI:
- 10.1002/agg2.20251
- https://doi.org/10.1002/agg2.20251
- Author:
- John D. Williams, et al. ; Dan S. Long; Catherine L. Reardon; Show all 3 Authors
- Source:
- Field crops research 2020 v.254 pp. 107787
- ISSN:
- 0378-4290
- Subject:
- arid lands; atmospheric precipitation; canola; conventional tillage; crop rotation; crop yield; cropping sequence; crops; fallow; growing season; infiltration rate; plant available water; reduced tillage; soil water storage; spring barley; spring wheat; triticale; water conservation; water use efficiency; winter wheat; Northwestern United States; Pacific States
- Abstract:
- ... A lack of plant available water limits the ability to intensify the summer fallow-winter wheat (SF-WW) rotation in low precipitation (<350 mm) areas of the inland Pacific Northwest (PNW). The objective of this study was to compare crop yield, water use efficiency, precipitation capture, and soil water storage between conventional-tillage SF and reduced tillage fallow (RTF) and among different 2-yr ...
- Handle:
- 10113/6937402
- DOI:
- 10.1016/j.fcr.2020.107787
- https://doi.org/10.1016/j.fcr.2020.107787
3. Soil Microbial and Chemical Properties of a Minimum and Conventionally Tilled Wheat–Fallow System
- Author:
- John D. Williams, et al. ; Catherine L. Reardon; Stewart B. Wuest; Caroline J. Melle; Ann M. Klein; Judit Barroso; Dan S. Long; Show all 7 Authors
- Source:
- Soil Science Society of America journal 2019 v.83 no.4 pp. 1100-1110
- ISSN:
- 0361-5995
- Subject:
- Triticum aestivum; crop rotation; edaphic factors; enzyme activity; enzymes; fallow; fungi; genes; microbial communities; nitrates; nitrogen cycle; nutrient availability; phosphates; soil depth; soil enzymes; soil pH; tillage; total nitrogen; winter wheat
- Abstract:
- ... Tillage alters the soil environment and microbial communities responsible for decomposition and nutrient cycling. This study aimed to evaluate the effects of tillage intensity (minimum vs. conventional) on the soil chemical and microbial properties of a winter wheat (Triticum aestivum L.)–fallow rotation in the low‐precipitation zone of the Pacific Northwest. Soils collected for 2 yr at two depths ...
- DOI:
- 10.2136/sssaj2018.09.0344
- https://doi.org/10.2136/sssaj2018.09.0344
4. Soil water in small drainages farmed with no-tillage and inversion tillage in northeastern Oregon
- Author:
- John D. Williams, et al. ; David S. Robertson; Show all 2 Author
- Source:
- Journal of soil and water conservation 2016 v.71 no.6 pp. 503-511
- ISSN:
- 0022-4561
- Subject:
- Cicer arietinum; Pisum sativum; Triticum aestivum; adaptive management; conventional tillage; crop residues; crop rotation; crop yield; crops; drainage; fallow; highlands; no-tillage; peas; planting; soil quality; soil water; spring; water use efficiency; winter; winter wheat; Oregon
- Abstract:
- ... Crop productivity in the semiarid inland Pacific Northwest, United States, is dependent on the capture and storage of precipitation as soil water. To maximize soil water in this region, the conventional crop strategy is a two-year cropping system in which winter wheat (Triticum aestivum L.) is grown after a 14 month fallow period. This system is popular in the intermediate precipitation zone (300 ...
- Handle:
- 10113/5922786
- DOI:
- 10.2489/jswc.71.6.503
- https://doi.org/10.2489/jswc.71.6.503
- Author:
- John D. Williams, et al. ; Catherine L. Reardon; Stewart B. Wuest; Dan S. Long; Show all 4 Authors
- Source:
- Soil Science Society of America journal 2018 v.82 no.2 pp. 455-462
- ISSN:
- 0361-5995
- Subject:
- Brassica carinata; Triticum aestivum; aggregate stability; arid lands; atmospheric precipitation; conventional tillage; crop rotation; crops; erodibility; fallow; minimum tillage; oilseeds; reduced tillage; silt loam soils; soil aggregation; soil structure; spring; water solubility; water stable soil aggregates; winter wheat; Pacific States
- Abstract:
- ... Core Ideas Soil attributes can be improved by intensifying crop rotations in combination with reduced tillage. There was weak evidence that intensifying wheat systems with oilseed crops improves aggregate stability. Reduced tillage produces fewer small class size aggregates that impede infiltration. Improving soil aggregation in the semiarid inland Pacific Northwest (PNW) cropping region can impro ...
- Handle:
- 10113/6472321
- DOI:
- 10.2136/sssaj2017.08.0302
- https://doi.org/10.2136/sssaj2017.08.0302
- Author:
- John D. Williams, et al. ; Stewart B. Wuest; David S. Robertson; Show all 3 Authors
- Source:
- Soil Science Society of America journal 2015 v.79 no.4 pp. 1206-1212
- ISSN:
- 0361-5995
- Subject:
- Haploxerolls; Triticum aestivum; crop rotation; crop yield; fallow; no-tillage; silt loam soils; soil water; soil water storage; spring; water use efficiency; winter; winter wheat; Oregon
- Abstract:
- ... The productivity of rainfed winter wheat (WW, Triticum aestivum L.) depends on the efficient capture and storage of precipitation. In the semi-arid Pacific Northwest (PNW), USA, soil water is managed through a 14-mo fallow period to establish wheat before winter and maximize growth potential the following spring. The effects of soil management on soil water storage were investigated on a Walla Wal ...
- Handle:
- 10113/5922789
- DOI:
- 10.2136/sssaj2014.12.0494
- https://doi.org/10.2136/sssaj2014.12.0494
- Author:
- John D. Williams, et al. ; Stewart B. Wuest; Show all 2 Author
- Source:
- Soil Science Society of America journal 2014 v.78 no.2 pp. 571-578
- ISSN:
- 0361-5995
- Subject:
- Haploxerolls; Mediterranean climate; Triticum aestivum; crop production; crop residues; hardpans; no-tillage; seed development; semiarid zones; silt loam soils; soil water; winter; winter wheat; Oregon
- Abstract:
- ... In semiarid climates, efficient precipitation capture and storage are necessary for successful small grain production. This is especially true in Mediterranean climates dependent on winter precipitation occurring before the most active growth and grain development stages of winter wheat (WW, Triticum aestivum L.). The effects of residue cover and tillage on soil water under annual WW were investig ...
- Handle:
- 10113/5927850
- DOI:
- 10.2136/sssaj2013.09.0414
- https://doi.org/10.2136/sssaj2013.09.0414
- Author:
- John D. Williams, et al. ; Bing Li; Norton P. Peet; Show all 3 Authors
- Source:
- Tetrahedron letters 2013 v.54 pp. 3124-3126
- ISSN:
- 0040-4039
- Subject:
- Eutrema japonica; chemical reactions; chemical structure; organic compounds; phytoalexins
- Abstract:
- ... Two new syntheses of the phytoalexin methyl 1-methoxyindole-3-carboxylate (1) were developed that employ the same key intermediate. Methyl 2-(2-nitrophenyl)acrylate (2) was directly converted into phytoalexin 1 using modified Cadogan–Sundberg indole synthesis conditions with trimethyl phosphite. Acrylate 2 also underwent reductive cyclization with stannous chloride to give methyl 1-hydroxyindole-3 ...
- DOI:
- 10.1016/j.tetlet.2013.04.009
- https://doi.org/10.1016/j.tetlet.2013.04.009
- Author:
- John D. Williams, et al. ; Matthew C. Torhan; Norton P. Peet; Show all 3 Authors
- Source:
- Tetrahedron letters 2013 v.54 pp. 3926-3928
- ISSN:
- 0040-4039
- Subject:
- chemical reactions; chemical structure; nitrogen; organic compounds; oxygen; solvents
- Abstract:
- ... 2-Pyridones are well-known ambident nucleophiles which are capable of reacting with electrophiles through either the nitrogen or oxygen atom to form N-alkyl-2-pyridones or 2-alkoxypyridines, respectively. It has been shown that the ratio of these products can be affected by a number of factors including the nature of the electrophile, the base used for deprotonation, and the solvent. We have now d ...
- DOI:
- 10.1016/j.tetlet.2013.05.054
- https://doi.org/10.1016/j.tetlet.2013.05.054
- Author:
- John D. Williams, et al. ; Dan S. Long; Show all 2 Author
- Source:
- Crop management 2011 v.10 no.1 pp. 0
- ISSN:
- 1543-7833
- Subject:
- minimum tillage; no-tillage; dry environmental conditions; crop yield; labor; Pisum sativum; weed control; peas; Triticum aestivum; input costs; fallow; dryland farming; winter wheat; crop rotation; herbicides; fuels; intensive cropping; chemical control; Oregon
- Abstract:
- ... In the intermediate annual precipitation zone (14 to 18 inches) of northeastern Oregon, there is interest in increasing the intensity of cropping with spring crops. Mechanical tillage remains popular for seedbed preparation and weed control, but contributes to environmental problems and high labor and fuel cost. No-tillage (NT) crop production can reduce on site and off site problems and has lower ...
- Handle:
- 10113/49525
- DOI:
- 10.1094/CM-2011-0328-01-RS
- https://doi.org/10.1094/CM-2011-0328-01-RS
- Author:
- John D. Williams, et al. ; Xiaoyuan Ding; Son T. Nguyen; Norton P. Peet; Show all 4 Authors
- Source:
- Tetrahedron letters 2014 v.55 no.51 pp. 7002-7006
- ISSN:
- 0040-4039
- Subject:
- chemical structure; cycloaddition reactions; toluene
- Abstract:
- ... Diels–Alder reactions of five-membered heterocycles containing one heteroatom with an N-arylmaleimide were studied. Cycloaddition of 2,5-dimethylfuran (4) with 2-(4-methylphenyl)maleimide (3) in toluene at 60°C gave bicyclic adduct 5. Cycloadditions of 3 with 2,5-dimethylthiophene (11) and 1,2,5-trimethylpyrrole (14) were also studied. Interestingly, the bicyclic compound 5 cleanly rearranged, wit ...
- DOI:
- 10.1016/j.tetlet.2014.10.114
- PubMed:
- 25838605
- PubMed Central:
- PMC4378267
- https://doi.org/10.1016/j.tetlet.2014.10.114
- Author:
- John D. Williams, et al. ; Helena Majgier-Baranowska; Bing Li; Norton P. Peet; Show all 4 Authors
- Source:
- Tetrahedron letters 2012 v.53 no.35 pp. 4785-4788
- ISSN:
- 0040-4039
- Subject:
- chemical reactions; chemical structure; organic compounds; oxygen
- Abstract:
- ... The Cadogan–Sundberg indole synthesis produces two major products from the treatment of 2-nitrostilbenes with triethyl phosphite, which are the 2-arylindoles and the corresponding 2-aryl-N-ethoxyindoles. We were interested in determining the origin of the oxygen atom in the 2-aryl-N-ethoxyindoles. In this study, we verify that this oxygen atom originates from the nitro group and not from the triet ...
- DOI:
- 10.1016/j.tetlet.2012.06.146
- https://doi.org/10.1016/j.tetlet.2012.06.146
- Author:
- John D. Williams, et al. ; Nicholas A. Riedel; Ketul C. Popat; Show all 3 Authors
- Source:
- Journal of materials science 2011 v.46 no.18 pp. 6087-6095
- ISSN:
- 0022-2461
- Subject:
- alloys; argon (noble gases); biocompatibility; hips; mesenchymal stromal cells; osteoblasts; phenotype; prostheses; rats; scanning electron microscopy; titanium
- Abstract:
- ... As the demand for hip and knee replacements continues to grow, researchers look to increase the operational lifetimes of these implants. Many implant failures are attributed to aseptic loosening caused from the repeated loading of these joints. It is believed that by improving the interface between the implant and natural tissue, implant life could be extended. This study evaluates the effects of ...
- DOI:
- 10.1007/s10853-011-5571-z
- https://doi.org/10.1007/s10853-011-5571-z