The LTAR Common Experiment: Facilitating improved agricultural sustainability through coordinated cross-site research.
Journal
Journal of environmental quality
ISSN: 1537-2537
Titre abrégé: J Environ Qual
Pays: United States
ID NLM: 0330666
Informations de publication
Date de publication:
15 Oct 2024
15 Oct 2024
Historique:
received:
30
05
2024
accepted:
12
09
2024
medline:
16
10
2024
pubmed:
16
10
2024
entrez:
15
10
2024
Statut:
aheadofprint
Résumé
Long-term research is essential for guiding the development of agroecosystems to meet escalating production demands in a manner that is environmentally sound and socially acceptable. Research must integrate biophysical and socioeconomic factors to provide geographically scalable knowledge that involves stakeholders across the research-education-extension-policy spectrum. In response to this need, the Long-Term Agroecosystem Research (LTAR) network developed a "Common Experiment," which seeks to develop and disseminate multi-region, science-based information to enable implementation of visionary agricultural innovations while simultaneously promoting food security, well-being, environmental quality, and climate adaptation and mitigation. The core design of the Common Experiment contrasts prevailing and alternative/aspirational production systems, with the latter including novel innovations hypothesized to advance sustainable intensification in locally appropriate ways. Treatments in the Common Experiment represent a diversity of production systems under cropland, grazing land, and integrated crop/grazing land management. Where possible, treatments are evaluated at multiple spatial scales (e.g., from plot to enterprise) and are designed to evolve over the course of the experiment with stakeholder input. A common assessment framework guides data collection for the experiment and is complemented by metric-specific protocols and an emerging data management infrastructure. Currently, there are large differences among sites in the application of the experimental framework and degree of stakeholder engagement; differences largely grounded in pragmatic issues related to land access, site expertise, and resource availability. The full potential of the LTAR Common Experiment may be realized with strategic investments in network capacity.
Types de publication
Journal Article
Review
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : USDA
Informations de copyright
© 2024 The Author(s). Journal of Environmental Quality published by Wiley Periodicals LLC on behalf of American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
Références
Abendroth, L. J., Liebig, M. A., & Robertson, G. P. (2024). Cropland Common Experiment: Standardized primary metric protocols. protocols.io.
Baffaut, C., Baker, J. M., Biederman, J. A., Bosch, D. D., Brooks, E. S., Buda, A. R., Demaria, E. M., Elias, E., Flerchinger, G. N., Goodrich, D. C., Hamilton, S. K., Hardegree, S. P., Harmel, R. D., Hoover, D. L., King, K. W., Kleinman, P., Liebig, M. A., McCarty, G. W., Moglen, G. E., … Yasarer, L. (2020). Comparative analysis of water budgets across the U.S. long‐term agroecosystem research network. Journal of Hydrology, 588, 125021. https://doi.org/10.1016/j.jhydrol.2020.125021
Bean, A., Coffin, A. W., Arthur, D. K., Baffaut, C., Holifield Collins, C., Goslee, S. C., Ponce‐Campos, G. E., Sclater, V. L., Strickland, T. C., & Yasarer, L. (2021). Regional frameworks for the USDA Long‐Term Agroecosystem Research network. Frontiers in Sustainable Food Systems, 4, 612785. https://doi.org/10.3389/fsufs.2020.612785
Browning, D. M., Russell, E. S., Ponce‐Campos, G. E., Kaplan, N. E., Richardson, A. D., Seyednasrollah, B., Spiegal, S. A., Saliendra, N. Z., Alfieri, J. G., Baker, J. M., Bernacchi, C. J., Bestelmeyer, B. T., Bosch, D. D., Boughton, E. H., Boughton, R. K., Clark, P., Flerchinger, G. N., Gomez‐Casanovas, N., Goslee, S. C., … Taylor, S. D. (2021). Monitoring agroecosystem productivity and phenology at a national scale: A metric assessment framework. Ecological Indicators, 131, 108147. https://doi.org/10.1016/j.ecolind.2021.108147
Cusser, S., Bahlai, C., Swinton, S. M., Robertson, G. P., & Haddad, N. M. (2020). Long‐term research avoids spurious and misleading trends in sustainability attributes of no‐till. Global Change Biology, 26, 3715–3725. https://doi.org/10.1111/gcb.15080
Doole, G., Tozer, K., Sauermann, C., Stevens, D., & Ward, J. (2023). Challenges and opportunities for conducting on‐farm research. Journal of New Zealand Grasslands, 85, 85–93. https://doi.org/10.33584/jnzg.2023.85.3659
Duriancik, L. F., Bucks, D., Dobrowolski, J. P., Drewes, T., Diane Eckles, S., Jolley, L., Kellogg, R. L., Lund, D., Makuch, J. R., O'Neill, M. P., Rewa, C. A., Walbridge, M. R., Parry, R., & Weltz, M. A. (2008). The first five years of the conservation effects assessment project. Journal of Soil and Water Conservation, 63(6), 185A–197A. https://doi.org/10.2489/jswc.63.6.185A
Eagle, A., Christianson, L., Cook, R., Harmel, R. D., Miguez, F., Qian, S., & Ruiz Diaz, D. A. (2017). Meta‐analysis constrained by data: Recommendations to improve relevance of nutrient management research. Agronomy Journal, 109, 2441–2449. https://doi.org/10.2134/agronj2017.04.0215
Fienitz, M., & Siebert, R. (2021). Urban versus rural? Conflict lines in land use disputes in the urban–rural fringe region of Schwerin, Germany. Land, 10(7), 726. https://doi.org/10.3390/land10070726
Fisher, R. A. (1992). Statistical methods for research workers. In S. Kotz & N. L. Johnson (Eds.) Breakthroughs in statistics. Springer series in statistics. Springer. https://doi.org/10.1007/978‐1‐4612‐4380‐9_6
Grace, P. E., & Kaufman, E. K. (2013). Effecting change through storytelling. Journal of Sustainability Education, 4, 1–16.
Harrison, J. (2008). Lessons learned from pesticide drift: A call to bring production agriculture, farm labor, and social justice back into agrifood research and activism. Agriculture and Human Values, 25, 163–167. https://doi.org/10.1007/s10460‐008‐9121‐5
Hobbie, J. E., Carpenter, S. R., Grimm, N. B., Gosz, J. R., & Seastedt, T. R. (2003). The U.S. Long Term Ecological Research program. BioScience, 53(1), 21–32. https://doi.org/10.1641/0006‐3568(2003)053[0021:TULTER]2.0.CO;2
Hoover, D. L., Abendroth, L. J., Browning, D. M., Saha, A., Snyder, K. A., Wagle, P., Witthaus, L. M., Baffaut, C., Biederman, J. A., Bosch, D. D., Bracho, R., Busch, D. L., Clark, P. E., Ellsworth, P. Z., Fay, P. A., Flerchinger, G. N., Kearney, S. P., Levers, L. R., Saliendra, N. Z., … Scott, R. L. (2022). Indicators of water use efficiency across diverse agroecosystems and spatiotemporal scales. Science of The Total Environment, 864, 160992. https://doi.org/10.1016/j.scitotenv.2022.160992
Johnston, A. E., & Poulton, P. R. (2018). The importance of long‐term experiments in agriculture: Their management to ensure continued crop production and soil fertility; the Rothamsted experience. European Journal of Soil Science, 69, 113–125. https://doi.org/10.1111/ejss.12521
Karl, J. W., Herrick, J. E., & Pyke, D. A. (2017). Monitoring protocols: Options, approaches, implementation, benefits. In D. Briske (Ed.), Rangeland systems (1st ed., pp. 527–567). Springer. https://doi.org/10.1007/978‐3‐319‐46709‐2_16
Keys, P. W., Badia, L., & Warrier, R. (2024). The future in Anthropocene science. Earth's Future, 12, e2023EF003820. https://doi.org/10.1029/2023EF003820
Khanna, M., Swinton, S. M., & Messer, K. D. (2018). Sustaining our natural resources in the face of increasing societal demands on agriculture: Directions for future research. Applied Economic Perspectives and Policy, 40, 38–59. https://doi.org/10.1093/aepp/ppx055
Kladivko, E. J., Helmers, M. J., Abendroth, L. J., Herzmann, D., Lal, R., Castellano, M. J., Mueller, D. S., Sawyer, J. E., Anex, R. P., Arritt, R. W., Basso, B., Bonta, J. V., Bowling, L. C., Cruse, R. M., Fausey, N. R., Frankenberger, J. R., Gassman, P. W., Gassmann, A. J., Kling, C. L., … Villamil, M. B. (2014). Standardized research protocols enable transdisciplinary research of climate variation impacts in corn production systems. Journal of Soil and Water Conservation, 69, 532–542. https://doi.org/10.2489/jswc.69.6.532
Kleinman, P., Spiegal, S., Rigby, J. R., Goslee, S. C., Baker, J. M., Bestelmeyer, B. T., Boughton, R. K., Bryant, R. B., Cavigelli, M. A., Derner, J. D., Duncan, E., Goodrich, D. C., Huggins, D. R., King, K. W., Liebig, M. A., Locke, M. A., Mirsky, S. B., Moglen, G. E., Moorman, T. B., … Walthall, C. L. (2018). Advancing the sustainability of US agriculture through Long‐Term Research. Journal of Environmental Quality, 47, 1412–1425. https://doi.org/10.2134/jeq2018.05.0171
Kravchenko, A. N., Snapp, S. S., & Robertson, G. P. (2017). Field‐scale experiments reveal persistent yield gaps in low‐input and organic cropping systems. Proceedings of the National Academy of Sciences, 114, 926–931. https://doi.org/10.1073/pnas.1612311114
Kumar, J., Coffin, A. W., Baffaut, C., Ponce‐Campos, G. E., Witthaus, L. M., & Hargrove, W. W. (2023). Quantitative representativeness and constituency of the Long‐Term Agroecosystem Research network and analysis of complementarity with existing ecological networks. Environmental Management, 72(4), 705–726. https://doi.org/10.1007/s00267‐023‐01834‐9
Lacoste, M., Cook, S. E., McNee, M. E., Gale, D., Ingram, J. R., Bellon‐Maurel, V., Macmillan, T., Sylvester‐Bradley, R., Kindred, D., Bramley, R. G., Tremblay, N., Longchamps, L., Thompson, L., Ruiz, J., García, F. O., Maxwell, B. D., Griffin, T. W., Oberthür, T., Huyghe, C., … Hall, A. (2022). On‐farm experimentation to transform global agriculture. Nature Food, 3, 11–18. https://doi.org/10.1038/s43016‐021‐00424‐4
Li, X., Storkey, J., Mead, A., Shield, I. F., Clark, I., Ostler, R., Roberts, B., & Dobermann, A. (2023). A new Rothamsted long‐term field experiment for the twenty‐first century: Principles and practice. Agronomy for Sustainable Development, 43, Article 60. https://doi.org/10.1007/s13593‐023‐00914‐8
Lockeretz, W., & Anderson, M. D. (1993). Agricultural research alternatives. University of Nebraska Press.
MacLaren, C., Mead, A., van Balen, D., Claessens, L., Etana, A., de Haan, J., Haagsma, W., Jack, O., Keller, T., Labuschagne, J., Myrbeck, A., Necpalova, M., Nziguheba, G., Six, J., Strauss, J., Swanepoel, P. A., Thierfelder, C., Topp, C., Tshuma, F., … Storkey, J. (2022). Long‐term evidence for ecological intensification as a pathway to sustainable agriculture. Nature Sustainability, 5, 770–779. https://doi.org/10.1038/s41893‐022‐00911‐x
Menefee, D. S., Scott, R. L., Abraha, M., Alfieri, J. G., Baker, J. M., Browning, D. M., Chen, J., Gonet, J. M., Johnson, J. M., Miller, G. R., Nifong, R. L., Robertson, P., Russel, E. R., Saliendra, N. Z., Schreiner‐Mcgraw, A. P., Suyker, A., Wagle, P., Wente, C. D., White, P. M., Jr, & Smith, D. R. (2022). Unraveling the effects of management and climate on carbon fluxes of U.S. croplands using the USDA Long‐Term Agroecosystem (LTAR) network. Agricultural and Forest Meteorology, 326, 109154. https://doi.org/10.1016/j.agrformet.2022.109154
Newton, P., Civita, N., Frankel‐Goldwater, L., Bartel, K., & Johns, C. (2020). What is regenerative agriculture? A review of scholar and practitioner definitions based on processes and outcomes. Frontiers in Sustainable Food Systems, 4, Article 577723. https://doi.org/10.3389/fsufs.2020.577723
Norris, C. E., Gorzelak, M., Arcand, M., Bruhjell, D., Carlyle, C. N., Dyck, M., Ellert, B., Entz, M., Geddes, C. M., Hao, X., Janovicek, K., Larney, F., May, W., St Luce, M., Van Eerd, L. L., Zhang, T., Beck, R., Cowen, T., Liptzin, D., & Morgan, C. L. S. (2023). The story of long‐term research sites and soil health in Canadian agriculture. Canadian Journal of Soil Science, 103(1), 164–190. https://doi.org/10.1139/cjss‐2021‐0174
Pagliari, P., Galindo, F. S., Strock, J., & Rosen, C. (2022). Use of repeated measures data analysis for field trials with annual and perennial crops. Plants, 11(13), 1783. https://doi.org/10.3390/plants11131783
Parolini, G. (2015). Charting the history of agricultural experiments. History and Philosophy of the Life Sciences, 37(3), 231–241. https://doi.org/10.1007/s40656‐015‐0079‐5
Peterson, G. A., Westfall, D. G., & Cole, C. V. (1993). Agroecosystem approach to soil and crop management research. Soil Science Society of America Journal, 57, 1354–1360. https://doi.org/10.2136/sssaj1993.03615995005700050032x
Prokopy, L. S. (2011). Agricultural human dimensions research: The role of qualitative research methods. Journal of Soil and Water Conservation, 66(1), 9A–12A. https://doi.org/10.2489/jswc.66.1.9A
Riar, A., & Bhullar, G. S. (2020). Long‐term experiments in agriculture: Stages, challenges, and precautions. In G. S. Bhullar & A. Riar (Eds.), Long‐term farming systems research: Ensuring food security in changing scenarios. Academic Press. https://doi.org/10.1016/C2018‐0‐03386‐1
Richardson, K., Steffen, W., Lucht, W., Bendtsen, J., Cornell, S., Donges, J. F., Drüke, M., Fetzer, I., Bala, G., von Bloh, W., Feulner, G., Fiedler, S., Gerten, D., Gleeson, T., Hofmann, M., Huiskamp, W., Kummu, M., Mohan, C., Nogués‐Bravo, D., … Rockström, J. (2023). Earth beyond six of nine planetary boundaries. Science Advances, 9, eadh2458. https://doi.org/10.1126/sciadv.adh2458
Robertson, G. P., Coleman, D. C., Bledsoe, C. S., & Sollins, P. (Eds.). (1999). Standard soil methods for long‐term ecological research. Oxford University Press.
Robertson, G. P., Allen, V. G., Boody, G., Boose, E. R., Creamer, N. G., Drinkwater, L. E., Gosz, J. R., Lynch, L., Havlin, J. L., Jackson, L. E., Pickett, S. T., Pitelka, L. F., Randall, A., Reed, A. S., Seastedt, T., Waide, R. B., & Wall, D. H. (2008). Long‐term Agricultural Research: A Research, Education, and Extension Imperative. Bioscience, 58(7), 640–645. https://doi.org/10.1641/B580711
Robertson, G. P., Broome, J. C., Chornesky, E. A., Frankenberger, J. R., Johnson, P., Lipson, M., Miranowski, J. A., Owens, E. D., Pimentel, D., & Thrupp, L. A. (2004). Rethinking the vision for environmental research in US agriculture. BioScience, 54, 61–65. https://doi.org/10.1641/0006‐3568(2004)054[0061:RTVFER]2.0.CO;2
Robertson, G. P., Burger, L. W., Kling, C. L., Lowrance, R., & Mulla, D. J. (2007). New approaches to environmental management research at landscape and watershed scales. In M. Schnepf & C. Cox (Eds.), Managing agricultural landscapes for environmental quality (pp. 27–50). Soil and Water Conservation Society.
Robertson, G. P., Gross, K. L., Hamilton, S. K., Landis, D. A., Schmidt, T. M., Snapp, S. S., & Swinton, S. M. (2014). Farming for ecosystem services: An ecological approach to production agriculture. BioScience, 64, 404–415. https://doi.org/10.1093/biosci/biu037
Rockström, J., Williams, J., Daily, G., Noble, A., Matthews, N., Gordon, L., Wetterstrand, H., DeClerck, F., Shah, M., Steduto, P., de Fraiture, C., Hatibu, N., Unver, O., Bird, J., Sibanda, L., & Smith, J. (2017). Sustainable intensification of agriculture for human prosperity and global sustainability. Ambio, 46(1), 4–17. https://doi.org/10.1007/s13280‐016‐0793‐6
Sandén, T., Spiegel, H., Stüger, H.‐P., Schlatter, N., Haslmayr, H.‐P., Zavattaro, L., Grignani, C., Bechini, L., D′Hose, T., Molendijk, L., Pecio, A., Jarosz, Z., Guzmán, G., Vanderlinden, K., Giráldez, J. V., Mallast, J., & ten Berge, H. (2018). European long‐term field experiments: Knowledge gained about alternative management practices. Soil Use and Management, 34, 167–176. https://doi.org/10.1111/sum.12421
Schall, D., Lansing, D. M., Leisnham, P. T., Shirmohammadi, A., Montas, H. J., & Hutson, T. E. (2018). Understanding stakeholder perspectives on agricultural best management practices and environmental change in the Chesapeake Bay: A Q methodology study. Journal of Rural Studies, 60, 21–31. https://doi.org/10.1016/j.jrurstud.2018.03.003
Shafer, S. R., & Jawson, M. D. (2012). Foreword. In M. A. Liebig, A. J. Franzluebbers, & R. F. Follett (Eds.), Managing agricultural greenhouse gases: Coordinated agricultural research through GRACEnet to address our changing climate (pp. ix–x). Academic Press.
Spiegal, S., Bestelmeyer, B., Archer, D., Augustine, D. J., Boughton, E. H., Boughton, R. K., Clark, P. E., Derner, J. D., Duncan, E., Hamilton, S., Hapeman, C., Harmel, D., Heilman, P., Holly, M., Huggins, D. R., King, K., Kleinman, P., Liebig, M. A., Locke, M., … Walthall, C. (2018). Evaluating strategies for sustainable intensification of U.S. agriculture through the Long‐Term Agroecosystem Research network. Environmental Research Letters, 13, 034031. https://doi.org/10.1088/1748‐9326/aaa779
Spiegal, S., Estell, R., Cibils, A., Cox, A., McIntosh, M. M., Browning, D. M., Duniway, M. C., Funk, M., Macon, L., McCord, S. E., Redd, M., Tolle, C., Utsumi, S., Walker, J., Webb, N., & Bestelmeyer, B. T. (2024). The LTAR Grazing Land Common Experiment at the Jornada Experimental Range: Old genetics, new precision technologies, and adaptive value chains. Journal of Environmental Quality. https://doi.org/10.1002/jeq2.20605
Spiegal, S., Kleinman, P. J., Endale, D. M., Bryant, R. B., Dell, C., Goslee, S., Meinen, R. J., Flynn, C., Baker, J., Browning, D., McCarty, G., Bittman, S., Carter, J., Cavigelli, M., Duncan, E., Gowda, P., Li, X., Ponce‐Campos, G. E., Raj, C., … Yang, Q. (2020). Manuresheds: Advancing nutrient recycling in US agriculture. Agricultural Systems, 182, 102813. https://doi.org/10.1016/j.agsy.2020.102813
Spiegal, S., Webb, N. P., Boughton, E. H., Boughton, R. K., Brymer, A. L. B., Clark, P. E., Collins, C. H., Hoover, D. L., Kaplan, N., & McCord, S. E. (2022). Measuring the social and ecological performance of agricultural innovations on rangelands: Progress and plans for an indicator framework in the LTAR network. Rangelands, 44, 334–344. https://doi.org/10.1016/j.rala.2021.12.005
Szetey, K., Moallemi, E. A., & Bryan, B. A. (2023). Knowledge coproduction reveals nuanced societal dynamics and sectoral connections in mapping sustainable human–natural systems. Earth's Future, 11, e2022EF003326. https://doi.org/10.1029/2022EF003326
Tejera, M., Boersma, N., Vanloocke, A., Archontoulis, S., Dixon, P., Miguez, F., & Heaton, E. (2019). Multi‐year and multi‐site establishment of the perennial biomass crop Miscanthus × giganteus using a staggered start design to elucidate N response. BioEnergy Research, 12, 471–483. https://doi.org/10.1007/s12155‐019‐09985‐6
Tsegaye, T., Eve, M., Hapeman, C. J., Kleinman, P. J. A., Baffaut, C., Browning, D. M., Coffin, A. W., & Spiegal, S. A. (2024). The LTAR network: Cross‐site transdisciplinary science to support a sustainable and resilient agriculture. Journal of Environmental Quality. https://doi.org/10.1002/jeq2.20649
United States Department of Agriculture, Agricultural Research Service (USDA‐ARS). (2024a). The Long‐Term Agroecosystem Research (LTAR) network. https://ltar.ars.usda.gov/
United States Department of Agriculture, Agricultural Research Service (USDA‐ARS). (2024b). Strategic plan—Long‐Term Agroecosystem Research network. https://ltar.ars.usda.gov/strategic‐plan/
United States Department of Agriculture, National Agricultural Library (USDA‐NAL). (2024). Ag data commons user guide. USDA. https://www.nal.usda.gov/services/agdatacommons
University of Idaho. (2024). Transformational agro‐ecosystem science team: Research team and collaborators. https://www.uidaho.edu/cnr/ltar‐tast/team
Walbridge, M. R., & Shafer, S. R. (2011). A long‐term agroecosystem research (LTAR) network for agriculture (Scientific Investigations Report 2011‐5169). In Proceedings of 4th interagency conference on research in the watersheds (pp. 195–200). U.S. Geological Survey.
Webb, N. P., Edwards, B. L., Heller, A., McCord, S. E., Schallner, J. W., Treminio, R. S., Wheeler, B. E., Stauffer, N. G., Spiegal, S., Duniway, M. C., Traynor, A. C. E., Kachergis, E., & Houdeshell, C.‐A. (2024). Establishing quantitative benchmarks for soil erosion and ecological monitoring, assessment, and management. Ecological Indicators, 159, 111661. https://doi.org/10.1016/j.ecolind.2024.111661
Welikhe, P., Williams, M., King, K. W., Bos, J., Akland, M. J., Baffaut, C., Beck, E. G., Bierer, A. M., Bosch, D. D., Brooks, E. S., Buda, A. R., Cavigelli, M. A., Faulkner, J., Feyereisen, G. W., Fortuna, A., Gamble, J. D., Hanrahan, B. R., Hussain, M. Z., Kovar, J. L., … Witthaus, L. M. (2023). Uncertainty in phosphorus fluxes and budgets across the U.S. long‐term agroecosystem research network. Journal of Environmental Quality, 52, 873–885. https://doi.org/10.1002/jeq2.20485
Wilkinson, M. D., Dumontier, M., Aalbersberg, I. J., Appleton, G., Axton, M., Baak, A., Blomberg, N., Boiten, J.‐W., da Silva Santos, L. B., Bourne, P. E., Bouwman, J., Brookes, A. J., Clark, T., Crosas, M., Dillo, I., Dumon, O., Edmunds, S., Evelo, C. T., Finkers, R., … Mons, B. (2016). The FAIR guiding principles for scientific data management and stewardship. Scientific Data, 3, 160018. https://doi.org/10.1038/sdata.2016.18
Wilmer, H., Derner, J. D., Fernández‐Giménez, M. E., Briske, D. D., Augustine, D. J., & Porensky, L. M. (2018). Collaborative adaptive rangeland management fosters management‐science partnerships. Rangeland Ecology and Management, 71, 646–657. https://doi.org/10.1016/j.rama.2017.07.008
Wilmer, H., Schulz, T. T., Fernández‐Giménez, M. E., Derner, J. D., Porensky, L. M., Augustine, D. J., Ritten, J. P., Dwyer, A. M., & Meade, R. (2022). Social learning lessons from collaborative adaptive rangeland management. Rangelands, 44, 316–326. https://doi.org/10.1016/j.rala.2021.02.002
Wulfhorst, J., Bruno, J., Toledo, D. N., Wilmer, H. N., Archer, D. W., Peck, D. E., & Huggins, D. R. (2022). Infusing ‘long‐term’ into social science rangelands research. Rangelands, 44, 299–305. https://doi.org/10.1016/j.rala.2022.06.001