S. M. Mitchell, N. Kennedy, J. Ma, G. Yorgey, C. Kruger, J. L. Ullman, C. Frear. Sept 2015. WSU Fact Sheet FS171E. This fact sheet reviews the basic elements of anaerobic digestion and the process used by digesters, including the types of digesters, biochemistry of influents and effluents, laboratory evaluations and optimizing anaerobic digesting through modeling. This fact sheet is part of the AD Systems Series.
N. Kennedy, G. Yorgey, C. Frear, C. Kruger 2015. WSU Fact Sheet FS172E. This publication focuses on pre-consumer food wastes that can sustainably be used as substrates for co-digestion with dairy manure and increase the value of co-products. Topics covered include complementary and problematic substrates, the substrate procurement process, regulations, and solutions for co-digestion processing issues. This fact sheet is part of the AD Systems Series.
N. Kennedy, G. Yorgey, C. Frear, D. Evans, J. Jensen, C. Kruger. 2015. WSU Fact Sheet FS180E. This fact discusses the chemical composition of renewable natural gas, the most appropriate end-use options for dairy digesters, and some of the more common techniques used to clean biogas to RNG quality at dairy digesters. This fact sheet is part of the AD Systems Series.
Galinato, S., C. Kruger, and C. Frear. 2015. WSU Extension Publication EM090E. This publication introduces readers to key concerns regarding the profitability of anaerobic digestion systems and examines the potential profitability of three alternative anaerobic digester systems: (a) combined heat and power, which is the baseline system; (b) boiler as a substitute for combined heat and power; and (c) renewable natural gas infrastructure. This fact sheet is part of the AD Systems Series.
Technology Research and Extension Related to Anaerobic Digestion of Dairy Manure, 2013-2015 biennium
Chen, S., C. Frear, M. Garcia-Perez, C. Kruger, A. Abghari, P. Ai, N. Abu-Lail, G. Astill, I. Dallmeyer, M. Flury, A. Fortuna, A. Gao, J. Garcia-Nunez, R. Ghoghare, J.B. Harsh, H. Iqbal, J. Jensen, N Kennedy, J. Ma, S. Mitchell, M. Smith, W. Suliman, D. Wang, G. Yorgey, L. Yu, Q. Zhao, S. Zhang, and T. Zhu. 2015. Washington State Department of Agriculture, Olympia, WA.
Chen, S., C. Frear, M. Garcia-Perez, J. Jensen, D. Sjoding, C. Kruger, N. Abu-Lail, G. Astill, I. Dallmeyer, M. Flury, A. Fortuna, J. Garcia-Nunez, S. Hall, J.B. Harsh, H. Iqbal, N Kennedy, J. Ma, S. Mitchell, B. Pecha, R. Pelaez-Smaniego, A. Seker, M. Smith, W. Suliman, G. Yorgey, L. Yu, and Q. Zhao. 2016. Publication 16-07-008. Washington Department of Ecology, Olympia, WA.
Evaluation of an integrated ammonia stripping, recovery, and biogas scrubbing system for use with anaerobically digested dairy manure
Jiang, A., Zhang, T., Zhao, Q., Chen, S., Li, X., Frear, C. (2014). Biosystems Engineering, 119: 117-126.
The selective removal of H2S over CO2 from biogas in a bubble column using pretreated digester effluent
Kennedy, N., Zhao, Q., Ma, J., Chen, S., and Frear, C. (2015). Separation and Purification Technology 144, 240-247.
Anaerobic digestion of C1-C4 light oxygenated organic compounds derived from the torrefaction of lignocellulosic materials
Liaw, S.S., Frear, C., Lei, W., Zhang, S., Garcia-Perez, M. (2015). Fuel Processing Technology, 131: 150-158.
Zhao, Q., Ma, J., Zeb, I., Yu, L., Chen, S., Zheng, Y.M., and Frear, C. (2015). Chemical Engineering Journal 279, 31-37.
Skolrud, T. 2015. WSU School of Economic Sciences working paper on technology issues associated with conventional dairies converting to organic.
Pythium species associated with damping-off of pea in certified organic fields in the Columbia Basin of central Washington
Alcala, A.C., Paulitz, T.C., Schroeder, K.L., Porter, L.D., Derie, M.L., and du Toit, L.J. 2016. Plant Disease 100:916-925.
Astill, G., R. Shumway, and C. Frear. 2016. This tool calculates the economic value of investment under a variety of technology and price scenarios for an AD system. The budget calculator includes options for anaerobic digestion, codigestion, compressed natural gas, combined heat and power, environmental credits, fiber solids separation, phosphorous solids separation, struvite precipitation, ammonium sulfate recovery, and water ultra-filtration/reverse osmosis.
Astill, G.M. and C.R. Shumway. Washington State University, School of Economic Sciences Working Paper 2016-5, March 2016.
The Market Impact of Widespread Adoption of Anaerobic Digestion with Nutrient Recovery Technology in US Dairy Industry
Astill, G.M. and C.R. Shumway. Washington State University, School of Economic Sciences Working Paper 2016-2, March 2016.
Case Study: Evaluating farm processed canola and camelina meals as protein supplements for beef cattle
Llewellyn, D.A., G. Rohwer, O.S. Norberg, E. Kimura, J.S. Neibergs, and S.C. Fransen. 2015. J. of NACAA, 8(2).
Astill, G.M. and C.R. Shumway. Washington State University, School of Economic Sciences Working Paper 2016-1, February 2016.
Detailed tables showing specific crop acreages from 2006-2014, farm numbers and organic acres by county, and organic farm gate sales by county (through 2013). Numbers of organic dairies and dairy cows are also included.
D. Granatstein, E. Kirby, and M. Brady. WSU Extension Fact Sheet EM097E. Sept. 2015. 29 pages. Contains details on area, value, yields, prices, and revenue per acre for organic sweet corn, green peas, snap beans, potatoes, onions, and carrot. Includes distributions of yields and prices, references on production costs, and break-even tables. Based on data from 2009-2012.
Murray, T., F. Resende, and G. Luo. 2014. WSU Fact Sheet FS140E. The United States has targeted biofuels generated from domestic biomass supplies as a significant contributor for future liquid fuel supplies. Reliance on domestic fuel production opens the door for a wide range of opportunities for natural resource managers, farmers, and other landowners who will be instrumental in developing the industry, its technologies, and its utilization of agricultural crop residues and forestry biomass. This publication discusses bio-oil produced via fast pyrolysis, its applications, and associated biomass feedstocks.
Kirby E. and D. Granatstein. A summary of the 2014 organic crop acres, livestock numbers and organic farm gate sales in the state, as well as some data on global trends. Includes multi-year graphs of selected crops, dairy, and sales. Powerpoint format.
Modeling environmental change: A guide to understanding model results that explore the impacts of climate change on regional environmental systems
Allen, E., G. Yorgey, K. Rajagopalan, and C. Kruger. 2015. WSU Extension Fact Sheet FS159E.
Kruger, C. 2009. Final Report to USDA SARE. This project supported the development, fabrication and demonstration of a biogas technology application for small farms.
Brady, M., E. Kirby, and D. Granatstein. WSU Extension Fact Sheet FS154E. April 2015.
A short summary of some key statistics about organic agriculture in the state, with data updated through 2013.
Kirby, E. and D. Granatstein. Current statistics on organic tree fruit acreage trends, varieties, shipments, prices, and exports. Includes global area data as well as cost of production data for Washington. Annotated Powerpoint format.
Yorgey, G., C. Frear, C. Kruger, T. Zimmerman. 2014. WSU Extension Fact Sheet FS136E. This fact sheet is part of the AD Systems Series.
Kirby, E., M. Brady, and D. Granatstein. WSU Extension Fact Sheet FS144E. 2014.
Yorgey, G., S. Kantor, K. Painter, H. Davis, and L. Bernacchi. 2014. Video and text farmer case study. Eric Odberg is a fourth generation farmer who practices no-till management and was an early adopter of variable rate nitrogen (VRN) application in the dryland production region of the Pacific Northwest.
Increasing resilience among cereal-based farmers in the Inland Pacific Northwest – Farmer to Farmer Case Studies
Yorgey, Georgine, Kathleen Painter, Hilary Davis, Kristy Borrelli, Sylvia Kantor, Leigh Bernacchi, R. Dennis Roe, Chad Kruger 2014. Video and print case studies part of REACCH PNA project. The goal of these case studies to inspire others to take management risks on their farms that can improve their overall sustainability and resiliency into the future. Future case studies are in progress and will focus on farmers who manage water in irrigated systems, tillage practices and residue management in unique ways.
This publication is the fourth in a series on high residue farming (HRF), for farmers who are interested in HRF. This publication gives an overview of the effects of adopting HRF on the management of weeds, insects, and diseases. EM074E.
This publication is the third in a series on high residue farming (HRF), for farmers who are interested in HRF. It discusses residue management after harvest and explains how to plant crops into high residue conditions with a planter or drill. It also covers modifications for existing equipment such as planters and drills, and soil fertility adjustments that may be necessary. EM073E.
This publication is the second in a series on high residue farming (HRF), for farmers who are interested in HRF. It discusses how to choose a cropping sequence, choosing specific cover crops, and special crop considerations for irrigated cropping systems in the far western United States. It includes a very helpful table of crops that shows the relative difficulty of specific rotations. EM072E.
This publication is the first in a series on high residue farming (HRF), for farmers who are interested in HRF. It provides an overview of HRF, including the benefits and challenges. It also discusses some special considerations for HRF in the irrigated agriculture regions of the far western United States. EM071E.
Extension Bulletin EM036E. Strip-tillage is a low-impact cultivation technique suited to irrigated land with a lot of residue from a previous crop. A strip-till system creates both clean-till and high-residue conditions in the same field, taking advantage of both systems while minimizing drawbacks. This publication discusses the benefits of this system, as well as equipment needed, general management concerns, and how to get started. A budget is also included to help growers determine the relative net cost of implementing this system. Originally published Jan 2011; revised Sept 2014.
Benbrook, C. and B. Baker. May 2014. Sustainability.
Productivity, economics, and fruit and soil quality of weed management systems in commercial organic orchards in Washington State, USA
Granatstein, D., P. Andrews, and A. Groff. May 2014. Organic Agriculture. DOI 10.1007/s13165-014-0068-0
Detailed tables showing specific crop acreages from 2006-2013, farm numbers and organic acres by county, and organic farm gate sales by county (through 2012).
A summary of the 2013 organic crop acres, livestock numbers and organic farm gate sales in the state. Includes multi-year graphs of selected crops. Powerpoint format.
Site-Specific Trade-offs of Harvesting Cereal Residues as Biofuel Feedstocks in Dryland Annual Cropping Systems of the Pacific Northwest, USA
Huggins, D.R., C.E. Kruger, K.M. Painter, D.P. Uberuaga. BioEnergy Research. June 2014, Volume 7, Issue 2, pp 598-608.
BioEarth: Envisioning and developing a new regional earth system model to inform natural and agricultural resource management
Adam, J. C., J. C. Stephens, S. H. Chung, M. P. Brady, R. D. Evans, C. E. Kruger, B. K. Lamb, M. Liu, C. O. Stöckle, J. K. Vaughan, K. Rajagopalan, J. A. Harrison, C. L. Tague, A. Kalyanaraman, Y. Chen, A. Guenther, F. Leung, L. R. Leung, A. B. Perleberg, J. Yoder, E. Allen, S. Anderson, B. Chandrasekharan, K. Malek, T. Mullis, C. Miller, T. Nergui, J. Poinsatte, J. Reyes, J. Zhu, J. S. Choate, X. Jiang, R. Nelson, J. Yoon, G. G. Yorgey, K. Johnson, K. J. Chinnayakanahalli, A. F. Hamlet, B. Nijssen, and V. Walden. Climatic Change, 2014. (DOI) 10.1007/s10584-014-1115-2
Yorgey, G. 2014. Recorded webinar. Part of Pacific Northwest Agriculture and Climate Change Webinar Series available here: http://csanr.wsu.edu/webinars/pnw-ag-and-climate-change/ .
Yorgey, G. 2014. Recorded webinar. Part of Pacific Northwest Agriculture and Climate Change Webinar Series available here: http://csanr.wsu.edu/webinars/pnw-ag-and-climate-change/ . Flux Tower 3-minute video referenced in presentation.
Borrelli, K. 2014. Recorded webinar. Part of Pacific Northwest Agriculture and Climate Change Webinar Series available here: http://csanr.wsu.edu/webinars/pnw-ag-and-climate-change/ .
Cogger, C., A. Fortuna, D. Collins. Feb 27, 2014. The second of a two-part webinar series on Greenhouse Gas Emissions and Soil Quality in Long-term Integrated and Transitional Reduced Tillage Organic Systems.
This is the focus of our current research. How do different organic vegetable production systems affect N2O emissions, and how do other outcomes of those systems affect their potential for adoption?
- Systems include full tillage with high-carbon amendment (compost), full tillage with low carbon amendment (broiler litter), pasture-vegetable rotation, and reduced tillage cover crop mulch.
- Measurements include N2O and CO2 emissions, soil N, microbial ecology focused on denitrification organisms, crop yield, and soil quality. Measurements are focused on key times during the season, including amendment application and tillage, irrigation, and freeze-thaw.
Intended audience is other researchers, and interested extension faculty and farmers.
Cogger, C., A. Fortuna, D. Collins. Feb 25, 2014. The first of a two-part webinar series on Greenhouse Gas Emissions and Soil Quality in Long-term Integrated and Transitional Reduced Tillage Organic Systems.
Topics for this webinar include:
- Source and properties of N2O as a greenhouse gas, its relative contribution to global
- warming, and the role of agriculture in N2O emissions
- Review of the nitrogen cycle and the production of N2O
- The relationship between organic practices and N2O production
- How we measure N2O emissions
Intended audience is extension faculty and farmers who want a big picture perspective on why we’re interested in nitrous oxide emissions.
Miles, Matt. Current situation as of Jan. 1, 2014 and comparison of trends for this year’s crop versus last year. Powerpoint format.
Granatstein, D. and E. Kirby. Current statistics on acreage trends, varieties, shipments, prices, and exports. Powerpoint format.
Sanford D. Eigenbrode, Susan M. Capalbo, Laurie L. Houston, Jodi Johnson-Maynard, Chad Kruger, & Beau Olen. Chapter 6 in, Dalton, M.M., P.W. Mote, and A.K. Snover [Eds.]. 2013. Climate Change in the Northwest: Implications for Our Landscapes, Waters, and Communities. Washington, D.C. Island Press.