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Thanks for your interest in these Publications! The most recent ones are on the top of the list. They're also organized by topic areas in the tabs at the bottom in this order- All, Errata, Cover Crops, Long-Term Systems Research (SOCS), Weed Management, Soil Phosphorus Issues in Organic Systems, Biological Control, Novel Tools & Methods, Opinion Papers, Soil Health, Plant Disease, Birds, Science Communication, Plant-Insect Interactions, Plant Propagation. To download or view a paper, just click the PDF link to the left of the paper. On a computer, if you mouse over or click the publication title you can see the abstract or summary. Enjoy.
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Link to PDFYearFull CitationInstitution
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Coming soon2025 In PressGomes, A. M., et al. (2025). Nitrogen Mineralization of Cover Crop Residue Depends on Carbon to Nitrogen Ratio and Soil Temperature. Journal of Environmental Quality. ACCEPTEDUSDA-ARS (Salinas, California, U.S.A.)
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https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/jeq2.70039
2025Mitchell, J. P., et al. (2025). The key role of local and global farmer networks in the development of conservation agriculture in California. Journal of Environmental Quality 54(5): 1288-1305.USDA-ARS (Salinas, California, U.S.A.)
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https://www.pnas.org/doi/10.1073/pnas.2316966121
2024Brennan E.B. 2024. “I” versus “the author”: The power of first-person voice when writing about science. Proceedings of the National Academy of Sciences 121:e2316966121. doi: doi:10.1073/pnas.2316966121.USDA-ARS (Salinas, California, U.S.A.)
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https://acsess.onlinelibrary.wiley.com/doi/full/10.1002/agj2.2mpling journey | Agronomy Journal (wiley.com)
2023Brennan E.B. 2023. Quadrat misuse: Confessions of a cover crop researcher's biomass sampling journey. Agronomy Journal 115:2275-2285.USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/BrennanPeerRevPdfs/Weed%20Sci%2071p312.pdf
2023Young et al. 2023. Agricultural Research Service Weed Science Research: Past, Present, and Future. Weed Science 71:312-327.USDA-ARS (Salinas, California, U.S.A.)
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https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/ael2.20099
2023Brennan E.B., R.F. Smith. 2023. Predicting cereal cover crop biomass using shoot length in California vegetable systems. Agricultural & Environmental Letters 8:e20099USDA-ARS (Salinas, California, U.S.A.)
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https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0267757
2022White, K.E., Brennan, E.B., Cavigelli, M.A., and Smith, R.F. 2022. Winter cover crops increased nitrogen availability and efficient use during eight years of intensive organic vegetable production. PLOS ONE 17(4), e0267757. doi: 10.1371/journal.pone.0267757.USDA-ARS (Salinas, California, U.S.A.)
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https://www.frontiersin.org/article/10.3389/fcomm.2021.725811
2021Brennan, E.B. (2021). Using Video to Give More Effective and Engaging Science Talks. Frontiers in Communication 6(195). doi: 10.3389/fcomm.2021.725811.USDA-ARS (Salinas, California, U.S.A.)
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https://www.frontiersin.org/articles/10.3389/fcomm.2021.586297/abstract
2021Brennan, E.B. (2021). Why Should Scientists be on YouTube? It’s all About Bamboo, Oil and Ice Cream. Frontiers in Communication 6(37), 586297. doi: 10.3389/fcomm.2021.586297.
USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/file/d/1PMSEluTuCt6XN-XVtX5-HWYm7Fww5kQn/view?usp=sharing
2020Brennan E.B. 2020. Sparrow Preferences for Winter Cover Crops in California's Central Coast. Frontiers in Sustainable Food Systems 4:567579. doi: 10.3389/fsufs.2020.567579.
USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=17q-jrU1vMQGhTMuKrxJZs2IaiawQ90JT
2020White K.E., E.B. Brennan, M.A. Cavigelli, R.F. Smith. 2020. Winter cover crops increase readily decomposable soil carbon, but compost drives total soil carbon during eight years of intensive, organic vegetable production in California. PLoS One 15:e0228677.
USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/Brennan%20pdfs/Soil%20Sci%20Soc%20Am%20J%2083p624%20and%20SI.pdfAY8szzYLi-I9AKk1zTtd
2019Brennan, E.B. and V. Acosta-Martinez. Cover crops and compost influence soil enzymes during 6 years of tillage-intensive, organic vegetable production. Soil Sci. Soc. Am. J. 83:624-637.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1I1EZDpMqYiGCn59GBj7kG-yMRksQjTl6
2018Brennan, E.B. 2018. The slide hammer seeder – A novel tool for planting small seeds. HortTechnology 28:764-775USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1oUVDZmb6_w5Z6qkCyMGJaafA56J0lQ66
2018Brennan, E.B. and V. Acosta-Martinez. 2018. Soil microbial biomass and enzyme data after six years of cover crop and compost treatments in organic vegetable production. Data Brief 21:212-227.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1iIycra5lk2MSu2xdBRyUFO2vLmZ10LgK
2018Brennan, E.B. and R.F. Smith, 2018. Mustard cover crop growth and weed suppression in organic, strawberry furrows in California. HortScience 53:432-440USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1hx5Ffb2uYbzyWCF70aWHCgzdcdnl9noh
2017Brennan E.B. 2017. Can we grow organic or conventional vegetables sustainably without cover crops? HortTechnology 27:151-161.USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/Brennan%20pdfs/Agron%20J%20109p2199%20incl.%20suppl.pdfKR2W8Pw
2017Brennan E.B., R.F. Smith. 2017. Cover crop frequency and compost effects on a legume-rye cover crop during 8 year of organic vegetables. Agron. J. 109:2199-2213.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1whKamL3pA76K1cdcwbcc9JbB7eTneYjz
2017Brennan E.B., V. Acosta-Martinez. 2017. Cover cropping frequency is the main driver of soil microbial changes during six years of organic vegetable production. Soil Biol. Biochem. 109:188-204.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=11fGWYz9Dmew4Rtqwi2wdY8RcUQH3FUFE
2016Brennan E.B. 2016. Agronomy of strip intercropping broccoli with alyssum for biological control of aphids. Biol. Control 97:109-119.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1ltCLr1G10cx_n7IFIuGKSrKXiOcAbHRB
2016Maltais-Landry E., K. Scow, E.B. Brennan, E. Torbert, P. Vitousek. 2016. Higher flexibility in input n:P ratios results in more balanced phosphorus budgets in two long-term experimental agroecosystems. Agric. Ecosyst. Environ. 223:197-210.USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/BrennanPeerRevPdfs/Soil%20Sci%20Soc%20Am%20J%2079p688.pdf
2015Maltais-Landry E., K. Scow, E.B. Brennan, P. Vitousek. 2015. Long-term effects of compost and cover crops on soil phosphorus in two California agroecosystems. Soil Sci. Soc. Am. J. 79:688-697.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1iDjShINsrhcQENsEMt0YljBzbiSJ-IoB
2015Smith R., E.B. Brennan, M. Bolda. 2015. Managing cover crops on strawberry furrow bottoms, University of California, Agriculture and Natural Resources Blog.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1UMRZ6TI-rb-dAY8szzYLi-I9AKk1zTtd
2015Smith R., M. Cahn, T. Voss, T. O'Geen, E.B. Brennan, K. Lowell, M. Bolda. 2015. Groundwater recharge on east side soils of the Salinas valley, University of California Cooperative Extension Monterey Blog.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1R7MmbrUAqamCRQ3Aj0zNw5tt07jgdtEK
2014Brennan E.B., J.E. Leap. 2014. A comparison of drill and broadcast methods for establishing cover crops on beds. HortScience 49:441-447.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1TymSJpWzQqu7NMiELIEBtKx2tL7rD3D0
2014Kuo Y.-W., R.L. Gilbertson, T. Turini, E.B. Brennan, R.F. Smith, T.F. Koike. 2014. Characterization and epidemiology of outbreaks of impatiens necrotic spot virus on lettuce in coastal California. Plant Dis. 98:1050-1059.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1lzNF7mW7xGyAYk0bQDjvulq79KGVgYvZ
2014Maltais-Landry E., K. Scow, E.B. Brennan. 2014. Soil phosphorus mobilization in the rhizosphere of cover crops has little effect on phosphorus cycling in California agricultural soils. Soil Biol. Biochem. 78:255-262.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1-GJyNpPcH3gEBJsZcZCcm9swGkJg-AOL
2013Brennan E.B. 2013. Agronomic aspects of strip intercropping lettuce with alyssum for biological control of aphids. Biol. Control 65:302-311.USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/Brennan%20pdfs/Agron%20J%20105p171.pdf1GvBO-pA
2013Brennan E.B., N.S. Boyd, R.F. Smith. 2013. Winter cover crop seeding rate and variety affects during eight years of organic vegetables: III. Cover crop residue quality and nitrogen mineralization. Agron. J. 105:171-182. USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/Brennan%20pdfs/Agron%20J%20104p799.pdf
2012Brennan E.B., N.S. Boyd. 2012. Winter cover crop seeding rate and variety affects during eight years of organic vegetables: II. Cover crop nitrogen accumulation. Agron. J. 104:799-806. USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/Brennan%20pdfs/Agron%20J%20104p684.pdfF7Z7P-
2012Brennan E.B., N.S. Boyd. 2012. Winter cover crop seeding rate and variety affects during eight years of organic vegetables: I. Cover crop biomass production. Agron. J. 104:684-698. USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=13RfepUIImlPLJh4aHjOODqUaVHombZhl
2012Ferris H., S. Sanchez-Moreno, E.B. Brennan. 2012. Structure, functions and interguild relationships of the soil nematode assemblage in organic vegetable production. Appl. Soil Ecol. 61:16-25.USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/Brennan%20pdfs/Agron%20J%20103p917.pdf20J%20103p449c.pdfYtdU2VOcp2M6e-k
2011Brennan E.B. 2011. A time-efficient scooping method to prepare cover crop seed for cone planters. Agron. J. 103:917-924.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1VzRggOlf44gadIs2nOllI0dm5rk0QO5e
2011Brennan E.B., O. Daugovish, R.F. Smith, S.A. Fennimore. 2011. Weeds, In: R. F. Smith et al., editors, Cover cropping for vegetable production: A grower’s handbook, Univ. of California, Oakland, CA. pp. 43-46.USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/Brennan%20pdfs/Agron%20J%20103p449c.pdf
2011Brennan E.B., N.S. Boyd, R.F. Smith, P. Foster. 2011. Comparison of rye and legume-rye cover crop mixtures for vegetable production in California. Agron. J. 103:449-463.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1Cf-rf2K1MK3KOwkSPi2t1D0WNa0iEFU9
2011Van Horn M., E.B. Brennan, O. Daugovish, J. Mitchell. 2011. Cover Crop Management, In: R. F. Smith et al., editors, Cover cropping for vegetable production: A grower’s handbook, Univ. of California, Oakland, CA. pp. 71-78.USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/Brennan%20pdfs/Agron%20J%20101p47.pdfGY
2009Boyd N.S., E.B. Brennan, R.F. Smith, R. Yokota. 2009. Effect of seeding rate and planting arrangement on rye cover crop and weed growth. Agron. J. 101:47-51.USDA-ARS (Salinas, California, U.S.A.)
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https://www.ars.usda.gov/ARSUserFiles/21904/Brennan%20pdfs/Agron%20J%20101p979c.pdf
2009Brennan E.B., N.S. Boyd, R.F. Smith, P. Foster. 2009. Seeding rate and planting arrangement effects on growth and weed suppression of a legume-oat cover crop for organic vegetable systems. Agron. J. 101:979-988.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=14JBEa6maqEfQaJNCcXZf7kQ50dAfo3hz
2006Boyd N.S., E.B. Brennan. 2006. Burning nettle, common purslane, and rye response to a clove oil herbicide. Weed Technol. 20:646-650.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=10AbkJ9hI2GuA7N5H8ZV0wDk4G8LYI9g8
2006Boyd N.S., E.B. Brennan. 2006. Weed management in a legume-cereal cover crop with the rotary hoe. Weed Technol. 20:733-737. USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=14IlnJreogTlKVOl1l2Y1R2IzrgRtj9iW
2006Boyd N.S., E.B. Brennan, S.A. Fennimore. 2006. Stale seedbed techniques for organic vegetable production. Weed Technol. 20:1052-1057.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1_uNTbdjDK7_aVKrTz1IWHtqbnoBvWMVF
2006Smith R., S. Fennimore, E. Brennan. 2006. Weed management for organic vegetable production on 80-inch beds. Crop Notes September/October:2-6.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=18WokQ4_0y2Ay2cmpwyyT2LTFRIrniovN
2005Brennan E.B., R.F. Smith. 2005. Winter cover crop growth and weed suppression on the central coast of California. Weed Technol. 19:1017-1024. USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1F3p0F1g7CxTg17j9_jv7zASpMIc-X80A
2003Brennan E.B., R. Smith. 2003. Cover crop cultivar and planting density impacts on cover crop productivity, and weed biomass and seed production in an organic system in the central coast of California, Proc. of the California Chapter of the American Society of Agronomy, Modesto, California. pp. 80-88.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1uSX-JtN-g6Yjvw6nl146Wo0Ui-6rEueZ
2003Grube R.C., E.B. Brennan, E.J. Ryder. 2003. Characterization and genetic analysis of a lettuce (Lactuca sativa L.) mutant, weary, that exhibits reduced gravitropic response in hypocotyls and inflorescence stems. J. Exp. Bot. 54:1259-1268.USDA-ARS (Salinas, California, U.S.A.)
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https://drive.google.com/open?id=1K-rmAppLDTB6o8gwVthdm8AK9wLtbyXC
2001Brennan E.B., S.A. Weinbaum. 2001. Effect of epicuticular wax on adhesion of psyllids to glaucous juvenile and glossy adult leaves of Eucalyptus globulus Labillardiere. Aust. J. Entomol. 40:270-277.University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1-JWQXlaDfoVVozOiKXFSfLmyhqjlNfoZ
2001Brennan E.B., S.A. Weinbaum. 2001. Stylet penetration and survival of three psyllid species on adult leaves and 'waxy' and 'de-waxed' juvenile leaves of Eucalyptus globulus. Entomol. Exp. Appl. 100:355-363.University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1-42Up0WRjuwmOK3zRGlAWubjXfCoKTL1
2001Brennan E.B., S.A. Weinbaum. 2001. Psyllid responses to colored sticky traps and the colors of juvenile and adult leaves of the heteroblastic host plant Eucalyptus globulus. Environ. Entomol. 30:365-370.University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1iIZRrZvkO2BZjMmUbZFLKc6yeVmadbjQ
2001Brennan E.B., S.A. Weinbaum. 2001. Performance of adult psyllids in no-choice experiments on juvenile and adult leaves of Eucalyptus globulus. Entomol. Exp. Appl. 100:179-185. University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1xZIhl8HM8KTR_QASzoHpz6K4XUvv3hMa
2001Brennan E.B., S.A. Weinbaum, K. Pinney. 2001. A new technique for studying the stylet tracks of homopteran insects in hand-sectioned plant tissue using light or epifluorescence microscopy. Biotechnic & Histochemistry 76:59-66.University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1Wyj_VoqY31aHfwNVYoLjNknZKjebjWcV
2001Brennan E.B., S.A. Weinbaum, J.A. Rosenheim, R. Karban. 2001. Heteroblasty in Eucalyptus globulus (Myricales : Myricaceae) affects ovipositonal and settling preferences of Ctenarytaina eucalypti and C. spatulata (Homoptera : Psyllidae). Environ. Entomol. 30:1144-1149.University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1DFReB-uOoFeRks_S-0c9axpJ4s5ObSPU
2001Brennan E.B., G.F. Hrusa, S.A. Weinbaum, W. Levison. 2001. Resistance of Eucalyptus species to Glycaspis brimblecombei (Homoptera : Psyllidae) in the San Francisco bay area. Pan-Pac. Entomol. 77:249-253.University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1sCiN4dPU7OhoGpYbkJTP1q3pwIFM7w4k
2000Thao M.L., M.A. Clark, L. Baumann, E.B. Brennan, N.A. Moran, P. Baumann. 2000. Secondary endosymbionts of psyllids have been acquired multiple times. Curr. Microbiol. 41:300-304.University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1s7Id8dDU3ckCivxSmxBXTewliGpnoXqr
2000Thao M.L., N.A. Moran, P. Abbot, E.B. Brennan, D.H. Burckhardt, P. Baumann. 2000. Cospeciation of psyllids and their primary prokaryotic endosymbionts. Appl. Environ. Microbiol. 66:2898-2905.University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1DFReB-uOoFeRks_S-0c9axpJ4s5ObSPU
1999Brennan E.B., R.J. Gill, G.F. Hrusa, S.A. Weinbaum. 1999. First record of Glycaspis brimblecombei (Moore) (Homoptera : Psyllidae) in North America: Initial observations and predator associations of a potentially serious new pest of Eucalyptus in California. Pan-Pac. Entomol. 75:55-57.University of California (Davis, California, U.S.A.)
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https://drive.google.com/open?id=1clyzy_XSBV1c2JhIfCpwcLeQx_MPxAp0
1999Mudge K.W., E.B. Brennan. 1999. Clonal propagation of multipurpose and fruit trees used in agroforestry, In: L. E. Buck et al., editors, Agroforestry in sustainable agricultural systems, CRC Press, Boca Raton. pp. 157-190.Cornell University (Ithaca, New York, U.S.A.)
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https://drive.google.com/open?id=1cTpMYS0SMRu0cJrCx8YxO5tSoSlKPWt_
1998Brennan E.B., K.W. Mudge. 1998. Clonal propagation of Leucaena by single bud splice grafting with a new grafting tool, and by modified veneer crown grafting. New Forests 15:283-297.Cornell University (Ithaca, New York, U.S.A.)
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https://drive.google.com/open?id=1_f5ssSjnGeBBJEmgtRnDP1Iu01H3p-mv
1998Brennan E.B., K.W. Mudge. 1998. Vegetative propagation of Inga feuillei from shoot cuttings and air layering. New Forests 15:37-51.Cornell University (Ithaca, New York, U.S.A.)
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https://drive.google.com/open?id=1l7A6m8TL_bQf0cklHuGq8ObteoOhrKwU
1998Brennan E.B., K.W. Mudge, A. Sherrer. 1998. Open-pollinated, interspecific f1 hybrid seed orchards of Leucaena - i. Rootstock effects. Agroforestry Systems 41:221-235.Cornell University (Ithaca, New York, U.S.A.)
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https://drive.google.com/open?id=1hDqPrjwezPCkAasGgjzp0bip9qvYS4cJ
1998Brennan E.B., K.W. Mudge, E. Elevitch. 1998. Open-pollinated, interspecific f1 hybrid seed orchards of Leucaena - ii. Analysis of seedlings. Agroforestry Systems 41:237-250.Cornell University (Ithaca, New York, U.S.A.)
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https://drive.google.com/open?id=1aEZrIX567RvI1GcZRcepfhrsWiFxvYGC
1995Brennan E.B. 1995. Weed mulch effects on feral pig damage of Inga fueillei seedlings. Chapter 2 of thesis (Vegetative and Seed Propagation of Inga and Leucaena), Cornell University. pp. 15.Cornell University (Ithaca, New York, U.S.A.)
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https://drive.google.com/open?id=1mnG0POR-5hDuqR8p5RbtgM0ocOPQw2js
1992Brennan E.B. 1992. A new grafting technique for Erythrina, Leucaena, and possibly other nitrogen fixing tree species. Nitrogen Fixing Tree Research Reports 10:85-88.Nitrogen Fixing Tree Association (Waimanalo, Hawai'i)
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https://drive.google.com/open?id=1ZRxSEoKMiRqi4aSQFsQlFmNFusl_MY-U
1990Brennan E.B. 1990. Using farmers & their ideas for effective extension work, In: C. Haugen et al., editors, Proc. of Strategies & Methods for Orienting Multipurpose Tree System Research for Small Scale Farm Use, Forestry/Fuelwood Res. & Devel. Project, & International Devel. Res. Center (Canada) Jakarta, Indonesia. pp. 94-97Ministry of Agriculture, Land Development Department / U.S. Peace Corps (Petchaboon,Thailand)
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