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Articles 31 - 60 of 280
Full-Text Articles in Agriculture
Elucidating Sorghum Biomass, Nitrogen And Chlorophyll Contents With Spectral And Morphological Traits Derived From Unmanned Aircraft System, Jiating Li, Yeyin Shi, Arun-Narenthiran Veeranampalayam-Sivakumar, Daniel P. Schachtman
Elucidating Sorghum Biomass, Nitrogen And Chlorophyll Contents With Spectral And Morphological Traits Derived From Unmanned Aircraft System, Jiating Li, Yeyin Shi, Arun-Narenthiran Veeranampalayam-Sivakumar, Daniel P. Schachtman
Department of Agronomy and Horticulture: Faculty Publications
Unmanned aircraft systems (UAS) provide an efficient way to phenotype cropmorphology with spectral traits such as plant height, canopy cover and various vegetation indices (VIs) providing information to elucidate genotypic responses to the environment. In this study, we investigated the potential use of UAS-derived traits to elucidate biomass, nitrogen and chlorophyll content in sorghum under nitrogen stress treatments. A nitrogen stress trial located in Nebraska, USA, contained 24 different sorghum lines, 2 nitrogen treatments and 8 replications, for a total of 384 plots. Morphological and spectral traits including plant height, canopy cover and various VIs were derived from UAS flights …
Forage News [2018-10], Department Of Plant And Soil Sciences, University Of Kentucky
Forage News [2018-10], Department Of Plant And Soil Sciences, University Of Kentucky
Forage News
- Profitability is focus of Kentucky Grazing Conference
- Bale Grazing: A Solution to the Mud in 2018?
- Poison Hemlock – Be Aware
Grains, Seeds And Hay Industry Funding Scheme Annual Report 2017/2018, Department Of Primary Industries And Regional Development, Western Australia
Grains, Seeds And Hay Industry Funding Scheme Annual Report 2017/2018, Department Of Primary Industries And Regional Development, Western Australia
Biosecurity published reports
The Grains, Seeds and Hay Industry Funding Scheme (IFS) has been operating since 2010 to address biosecurity threats relevant to Western Australia’s (WA) grains, seeds and hay industry. The Scheme was established under the Biosecurity and Agriculture Management Act 2007 to enable growers to identify the pest and disease priorities at a whole-of-industry level and raise funds for activities to address these priorities.
There are currently three Industry Funding Schemes in operation. In addition to the Grains, Seeds and Hay IFS, there is a Cattle IFS and a Sheep and Goat IFS. The three IFSs operate in a similar manner. …
Pemban Farmer Agency In Adapting To Climate Change, Rachael Hood
Pemban Farmer Agency In Adapting To Climate Change, Rachael Hood
Independent Study Project (ISP) Collection
As a result of climate change, agricultural societies will be challenged by a variety of altered conditions, including increased severe weather events, saltwater intrusion, pest and disease outbreaks, and higher temperatures. The island of Pemba, in the Zanzibar archipelago, is home to many small-scale agriculturalists. During this study, I interviewed Pemban farmers in the districts of Wete and Micheweni about their awareness of the impacts of climate change and the mitigation strategies that they have implemented. The results from Pemba were compared to relevant academic literature regarding climate change to explore whether disparities exist between models of climate change in …
Nebline, October 2018
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Nebraska Extension’s CHIME program: Enhancing childcare professionals’ well-being with mindfulness
Food & Health
Farm & Acreage
Pests & Wildlife
Horticulture
Early Childhood
4-H & Youth
and other extension news and events
The Effect Of Ingredient-Specific Calorie Information On Calories Ordered, Christopher R. Gustafson, Eliana Zeballos
The Effect Of Ingredient-Specific Calorie Information On Calories Ordered, Christopher R. Gustafson, Eliana Zeballos
Department of Agronomy and Horticulture: Faculty Publications
Providing calorie labeling is a widely used strategy to combat obesity. However, there is little evidence that the availability of calorie information at food-away-from-home establishments has an effect on food choices. Listing calorie information for each ingredient, though, may allow customers to avoid high-calorie items that add little to their enjoyment. Data from a natural experiment were used to compare total calories ordered before and after the provision of per-ingredient versus for build-your-own sandwiches, and per-sandwich for pre-defined sandwiches, at a supermarket sandwich counter. Sandwich order slips from a Lincoln, Neb. supermarket were collected from December 15, 2016 to February …
Knowledge, Skills, And Abilities In The Precision Agriculture Workforce: An Industry Survey, Bruce Erickson, Scott W. Fausti, David Clay, Sharon Clay
Knowledge, Skills, And Abilities In The Precision Agriculture Workforce: An Industry Survey, Bruce Erickson, Scott W. Fausti, David Clay, Sharon Clay
Agronomy, Horticulture and Plant Science Faculty Publications
Precision agriculture encompasses a set of related technologies aimed at better utilizing crop inputs, increasing yield and quality, reducing production risks, and enabling information flow throughout the crop supply and end-use chains. As agricultural businesses invest in precision offerings, their capacity to provide these products and services will depend on their ability to hire and retain employees with appropriate proficiency as defined in their knowledge, skills, and abilities (KSAs). A 2015 survey of agricultural retailers examined the minimum educational requirements retailers were seeking in their hires, along with the importance of a list of KSAs for the various positions that …
Justice Served Fresh: Associations Between Food Insecurity, Community Gardening, And Property Value, Micajah Daniels, Courtney Coughenour Ph.D
Justice Served Fresh: Associations Between Food Insecurity, Community Gardening, And Property Value, Micajah Daniels, Courtney Coughenour Ph.D
McNair Poster Presentations
Numerous stakeholders in Nevada have used a variety of efforts to combat the growth of food insecurity facing Nevadans. The purpose of this research project is to understand the association between food insecurity, community gardens, and property value. Following the wealth of scholarship on these topics and data collected from community garden agencies in Southern Nevada, the research questions for this project include: (1) Where are community gardens located in SNV? (2) What efforts community gardens agencies are doing to address food insecurity (most interested in their efforts using community gardens)? (3) What are the perceptions of supports and barriers …
Phylogenomic Evidence For Ancient Recombination Between Plastid Genomes Of The Cupressus-Juniperus-Xanthocyparis Complex (Cupressaceae), Andan Zhu, Weishu Fan, Robert P. Adams, Jeffrey P. Mower
Phylogenomic Evidence For Ancient Recombination Between Plastid Genomes Of The Cupressus-Juniperus-Xanthocyparis Complex (Cupressaceae), Andan Zhu, Weishu Fan, Robert P. Adams, Jeffrey P. Mower
Department of Agronomy and Horticulture: Faculty Publications
Background: Phylogenetic relationships among Eastern Hemisphere cypresses, Western Hemisphere cypresses, junipers, and their closest relatives are controversial, and generic delimitations have been in flux for the past decade. To address relationships and attempt to produce a more robust classification, we sequenced 11 new plastid genomes (plastomes) from the five variously described genera in this complex (Callitropsis, Cupressus, Hesperocyparis, Juniperus, and Xanthocyparis) and compared them with additional plastomes from diverse members of Cupressaceae.
Results: Phylogenetic analysis of protein-coding genes recovered a topology in which Juniperus is sister to Cupressus, whereas a tree based on …
Forage News [2018-09], Department Of Plant And Soil Sciences, University Of Kentucky
Forage News [2018-09], Department Of Plant And Soil Sciences, University Of Kentucky
Forage News
- Dealing with high nitrates in forage
- New crimson clover, Kentucky Pride, available
- Horse farm sees success from pasture renovations
Nebline, September 2018
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Septic systems need regular maintenance to function properly
Food & Health
Farm & Acreage
Pests & Wildlife
Horticulture
Early Childhood
4-H & Youth
and other extension news and events
Effects Of Fruit Position In Standard Place Pack Cartons And Gamma 1 Irradiation On The Postharvest Quality Of ‘Barnfield’ Navel Oranges, Karina Cruz Rodriguez (Friscia), José De Jesús Ornelas-Paz, Vrani Ibarra-Junquera, Maria Criselda Toto, Akanksha Jain, Anuradha Prakash
Effects Of Fruit Position In Standard Place Pack Cartons And Gamma 1 Irradiation On The Postharvest Quality Of ‘Barnfield’ Navel Oranges, Karina Cruz Rodriguez (Friscia), José De Jesús Ornelas-Paz, Vrani Ibarra-Junquera, Maria Criselda Toto, Akanksha Jain, Anuradha Prakash
Food Science Faculty Articles and Research
The objective of this study was to determine if oranges in the top and bottom layers within a Standard Place Pack were impacted differently by irradiation after long-term storage. ‘Barnfield’ Navel oranges were packed in Standard Place Pack cartons and treated with 0, 0.15, or 1 kGy of gamma irradiation. The fruit were stored for 3 weeks at 5 °C and then for 1 week at 20 °C. After storage, the fruit from the top and bottom layers were separately evaluated for quality. The development of stem-end rind breakdown (SERB) was the main cause of quality loss and was greater …
Aspen Recruitment In The Yellowstone Region Linked To Reduced Herbivory After Large Carnivore Restoration, Luke E. Painter, Robert L. Beschta, Eric J. Larsen, William J. Ripple
Aspen Recruitment In The Yellowstone Region Linked To Reduced Herbivory After Large Carnivore Restoration, Luke E. Painter, Robert L. Beschta, Eric J. Larsen, William J. Ripple
Aspen Bibliography
Quaking aspen (Populus tremuloides) recruitment during the 1980s–90s was suppressed by Rocky Mountain elk (Cervus canadensis) herbivory on winter ranges in the Yellowstone region, and saplings (young aspen taller than 2 m) were rare. Following the 1995–96 reintroduction of gray wolves (Canis lupus), browsing decreased and sapling recruitment increased in Yellowstone National Park. We compared aspen data from inside the park to data collected in three winter ranges outside the park. For most areas, the percentage of young aspen browsed annually was 80–100% in 1997–98, decreasing to 30–60% in 2011–15. Sapling recruitment was inversely …
Effects Of Stand Structure, Browsing, And Biophysical Conditions On Regeneration Following Mountain Pine Beetle In Mixed Lodgepole Pine And Aspen Forests Of The Southern Rockies, Kristen A. Pelz, Frederick W. Smith
Effects Of Stand Structure, Browsing, And Biophysical Conditions On Regeneration Following Mountain Pine Beetle In Mixed Lodgepole Pine And Aspen Forests Of The Southern Rockies, Kristen A. Pelz, Frederick W. Smith
Aspen Bibliography
Aspen (Populus tremuloides) and lodgepole pine (Pinus contorta var. latifolia) co-occur in the southern Rocky Mountains (USA), where mountain pine beetle (MPB, Dendroctonus ponderosae) has caused extensive lodgepole pine mortality since the late 1990s. Both species excel in post-disturbance high-light environments, but lodgepole pine has generally been thought to establish poorly on undisturbed seedbeds, and aspen suckering may be inhibited by intact aspen overstory. We ask whether lodgepole pine and aspen will regenerate in sufficient quantities to revegetate these forests. We visited a random sample of aspen and lodgepole pine stands across the affected landscape …
Mobile Elements Shape Plastome Evolution In Ferns, Tanner A. Robison, Amanda L. Grusz, Paul G. Wolf, Jeffrey P. Mower, Blake D. Fauskee, Karla Sosa, Eric Schuettpelz
Mobile Elements Shape Plastome Evolution In Ferns, Tanner A. Robison, Amanda L. Grusz, Paul G. Wolf, Jeffrey P. Mower, Blake D. Fauskee, Karla Sosa, Eric Schuettpelz
Department of Agronomy and Horticulture: Faculty Publications
Plastid genomes display remarkable organizational stability over evolutionary time. From green algae to angiosperms, most plastid genomes are largely collinear, with only a few cases of inversion, gene loss, or, in extremely rare cases, gene addition. These plastome insertions are mostly clade-specific and are typically of nuclear or mitochondrial origin. Here, we expand on these findings and present the first family-level survey of plastome evolution in ferns, revealing a novel suite of dynamic mobile elements. Comparative plastome analyses of the Preridaceae expose several mobile open reading frames that vary in sequence length, insertion site, and configuration among sampled taxa. Even …
Invasive-Plant-Removal Frequency—Its Impact On Species Spread And Implications For Further Integration Of Forest-Management Practices, Bernabas Wolde, Pankaj Lal
Invasive-Plant-Removal Frequency—Its Impact On Species Spread And Implications For Further Integration Of Forest-Management Practices, Bernabas Wolde, Pankaj Lal
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works
For a given invasive plant species and control method, effective invasive plant eradication requires regular monitoring and management. While most previous studies characterize invasive plant species, develop appropriate control methods, or prioritize species for management using aggressiveness and other considerations, few study why some forestland owners are less likely than others to regularly remove invasive plant species. Such information is useful in prioritizing and targeting forestland owners who are at greater risk for invasion, with the stands threatening adjacent forestlands. Towards this end, we surveyed 1800 forestland owners in Virginia and Texas. We use data on forestland owners’ socioeconomics and …
Plant Metabolic Pathways And Regulatory Networks For Aromatic Amino Acids And Hormones, Cynthia Holland
Plant Metabolic Pathways And Regulatory Networks For Aromatic Amino Acids And Hormones, Cynthia Holland
Arts & Sciences Electronic Theses and Dissertations
Unlike humans and other metazoans, organisms such as fungi, bacteria, and plants have retained the enzymatic machinery necessary to synthesize their aromatic amino acids de novo. Chorismate, the final product of the shikimate pathway, is the precursor to the three aromatic amino acidsѠtryptophan, tyrosine, and phenylalanineѠand is upstream of a number of plant growth hormones, including auxins and benzoates. Phenylalanine and tyrosine both stem from the precursor prephenate, which is formed from chorismate by chorismate mutase, and use dehydrogenases, aminotransferases, and dehydratases in their biosynthetic pathways. Although aromatic amino acid biosynthesis is important for protein synthesis, secondary metabolism, and human …
The Effect Of Two Different Harvesting Methods On The Yield Of 'Topbunch' And 'Hi-Crop' Collards (Brassica Oleracea (L)) When Grown In A Wiregrass Tunnel House, Veronica E. Walton, Raymon Shange, Melissa Johnson, Edward Sparks, Victor Khan, James E. Currington, Ramble Ankumah, Nathaniel Ellison, George X. Hunter Jr., Jeffery L. Moore
The Effect Of Two Different Harvesting Methods On The Yield Of 'Topbunch' And 'Hi-Crop' Collards (Brassica Oleracea (L)) When Grown In A Wiregrass Tunnel House, Veronica E. Walton, Raymon Shange, Melissa Johnson, Edward Sparks, Victor Khan, James E. Currington, Ramble Ankumah, Nathaniel Ellison, George X. Hunter Jr., Jeffery L. Moore
Professional Agricultural Workers Journal
A study was conducted to determine if 100% or 50% harvesting of collard leaves was a suitable recommendation for Tunnel House producers. The experiment was conducted as a split-split plot design with varieties as the main plots, harvesting 100% or 50% of leaves as the sub-plots, and days after transplanting as the subplots. All treatments were replicated three times, drip irrigated, and fertilized according to soil test recommendations. The results showed significant interactions between varieties and method of harvest, for leaf numbers and weight. Conversely, the varieties showed significant differences for yield but not leaf numbers. Both varieties showed significant …
The Evaluation Of Two Different Harvesting 'Topbunch' And 'Hi-Crop' Collards (Brassica Oleracea (L)) Leaves From Plants Grown In A Wiregrass Tunnel House, Edward Sparks, Raymon Shange, Jacquelyn Jackson, Victor Khan, James E. Currington, Ramble Ankumah, Nathaniel Ellison, George X. Hunter Jr., Jeffery L. Moore
The Evaluation Of Two Different Harvesting 'Topbunch' And 'Hi-Crop' Collards (Brassica Oleracea (L)) Leaves From Plants Grown In A Wiregrass Tunnel House, Edward Sparks, Raymon Shange, Jacquelyn Jackson, Victor Khan, James E. Currington, Ramble Ankumah, Nathaniel Ellison, George X. Hunter Jr., Jeffery L. Moore
Professional Agricultural Workers Journal
A study was conducted to determine if a 100% or 50% harvest intensity of ‘Topbunch’ collards leaves could be a recommended practice for Tunnel House producers. The experiment was conducted as a split-plot design with harvest dates as main plots, and harvesting intensity of 100% or 50% of leaves as sub-plots. All treatments were replicated three times, drip irrigated, and fertilized according to soil test recommendations. The results showed significant interactions between harvest methods and dates for number and weight of leaves harvested. There were also significant differences for the weight of leaves harvested and numbers. The leaf recovery rates …
Flower Visitation In Relation To Pollen And Nectar Nutrition: Implications For Pollinator Habitat And Conservation, Megan E. Leach
Flower Visitation In Relation To Pollen And Nectar Nutrition: Implications For Pollinator Habitat And Conservation, Megan E. Leach
Electronic Theses and Dissertations
Pollination of both wild and crop plants is at a crossroads; honey bee populations are experiencing losses at a higher rate than ever before, and some native bee species are declining in abundance to the point of being listed as endangered species. A few examples of these threats include pesticide exposure, habitat loss, and climate change. In response to bee population declines, conservation efforts have been initiated to increase habitat quality for bees by planting pollinator reservoirs or gardens. Plants provide nutrition to bees in the form of pollen and nectar. Several studies have shown links between higher nutritional quality …
The Effects Of Biochar And Nitrogen Stabilizers Application On Forage Crop Growth, Greenhouse Gas Emission And Soil Quality, Joseph Elias Rodrigues Mikhael
The Effects Of Biochar And Nitrogen Stabilizers Application On Forage Crop Growth, Greenhouse Gas Emission And Soil Quality, Joseph Elias Rodrigues Mikhael
LSU Doctoral Dissertations
ABSTRACT
Forage systems are important for animal production. Nitrogen fertilization and herbicides use has led to a significant increase in forage production. Therefore, this study aimed to investigate the effects of biochar and N-(n-butyl) thiophosphoric triamide + dicyandiamide (NBPT+DCD) application on manure and urea fertilized soil by focusing on nitrogen fertilizer efficiency use, greenhouse gases emissions, microbial community, soil aggregate stability, and organic carbon functional groups. In addition, herbicides effect on greenhouse gases emission was assessed. Biochar and NBPT+DCD increased nitrogen use efficiency of both fertilizers managements and reduced the N2O emissions following manure fertilization. However, NBPT+DCD was …
Perma/Culture: Imagining Alternatives In An Age Of Crisis By Molly Wallace And David Carruthers, Bryant Scott
Perma/Culture: Imagining Alternatives In An Age Of Crisis By Molly Wallace And David Carruthers, Bryant Scott
The Goose
Review of Molly Wallace and David Carruthers' Perma/Culture: Imagining Alternatives in an Age of Crisis.
Aiding Growers’ Decisions: Describing Arkansas Blackberry Growers’ Resources And Needs Regarding Blackberry Production, Lesley Marie Smith
Aiding Growers’ Decisions: Describing Arkansas Blackberry Growers’ Resources And Needs Regarding Blackberry Production, Lesley Marie Smith
Graduate Theses and Dissertations
This study was a census of blackberry growers who attended the Blackberry Growers Association informal interest meetings held throughout the state during the month of April. The purpose of this study was to describe blackberry operations in Arkansas, describe the ideal blackberry cultivar growers want to produce, describe resources they use to research production information, and describe what changes to current resources growers would like to have. Questionnaire responses regarding blackberry production of 18 blackberry growers in the state of Arkansas were analyzed. Three growers elected to not participate resulting in an 86% response rate. The researcher hopes that this …
Band-Sowing With Hoeing For Weed Management In Organic Grains, Margaret R. Mccollough
Band-Sowing With Hoeing For Weed Management In Organic Grains, Margaret R. Mccollough
Electronic Theses and Dissertations
Weeds remain the foremost production challenge for organic small grain growers in the Northeastern United States. Instead of sowing crops in narrow, single-line rows, band-sowing with inter-band hoeing is a cropping strategy that could provide superior weed control. In theory, band-sowing suppresses weeds in the intra-band zone by improving the spatial arrangement of the crop from that of typical rows to a more uniform pattern within the planted bands, maximizing interspecific and reducing intraspecific competition. Weeds in the inter-band zone are controlled by cultivating with aggressive sweeps; tine harrowing can target weeds in the intra- and inter-band zones.
Chapter one …
Grapevine Vein Clearing Virus: Epidemiological Patterns And Construction Of A Clone, Cory Von Keith
Grapevine Vein Clearing Virus: Epidemiological Patterns And Construction Of A Clone, Cory Von Keith
MSU Graduate Theses
Grapevine vein clearing virus (GVCV) is a recently discovered virus belonging to the Badnavirus genus. Characteristic to its name, the virus is associated with a disease where symptoms manifest as pronounced vein-clearing, resulting in severe berry deformation and vine decline in susceptible grape varieties. Sustainable production of wine is dependent on healthy plants. The associated disease is mainly found in Midwest vineyards. Attempts were made in this thesis to provide evidence of causality of the virus to the associated disease and to infer the historical path and migration pattern of GVCV. Conclusions and discussions will provide grape producers with the …
Forage News [2018-08], Department Of Plant And Soil Sciences, University Of Kentucky
Forage News [2018-08], Department Of Plant And Soil Sciences, University Of Kentucky
Forage News
- Plan your fall seeding now
- Submitting plant samples for diagnosis
- Minimize alfalfa crown rot with potassium
Cover Crops Have Negligible Impact On Soil Water In Nebraska Maize–Soybean Rotation, J. Burdette Barker, Derek M. Heeren, Katja Koehler-Cole, Charles Shapiro, Humberto Blanco-Canqui, Roger W. Elmore, Christopher A. Proctor, Suat Irmak, Charles A. Francis, Tim M. Shaver, Ali T. Mohammed
Cover Crops Have Negligible Impact On Soil Water In Nebraska Maize–Soybean Rotation, J. Burdette Barker, Derek M. Heeren, Katja Koehler-Cole, Charles Shapiro, Humberto Blanco-Canqui, Roger W. Elmore, Christopher A. Proctor, Suat Irmak, Charles A. Francis, Tim M. Shaver, Ali T. Mohammed
Department of Biological Systems Engineering: Papers and Publications
One perceived cost of integrating winter cover cropping in maize (Zea mays L.) and soybean [Glycine max (L.) Merr.] rotation systems is the potential negative impact on soil water storage available for primary crop production. The objective of this 3-year study was to evaluate the effects of winter cover crops on soil water storage and cover crop biomass production following no-till maize and soybean rotations. Locations were near Brule (west-central), Clay Center (south-central), Concord (northeast), and Mead (east-central), Nebraska, United States. Treatments included crop residue only (no cover crop) and a multi-species cover crop mix, both broadcast-seeded before …
Nebline, August 2018
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Nutrition Education Kits developed by Extension help LPS students learn about nutrition and physical activity
Food & Health
Farm & Acreage
Pests & Wildlife
Horticulture
Early Childhood
4-H & Youth
and other extension news and events
Special pullout section: Lancaster County Super Fair 2018 Schedule & Map
Fitness Consequences Of Interspecific Nesting Associations Among Cavity-Nesting Birds, James C. Mouton, Thomas E. Martin
Fitness Consequences Of Interspecific Nesting Associations Among Cavity-Nesting Birds, James C. Mouton, Thomas E. Martin
Aspen Bibliography
Interspecific aggregations of prey may provide benefits by mitigating predation risk, but they can also create costs if they increase competition for resources or are more easily detectable by predators. Variation in predation risk and resource availability may influence the occurrence and fitness effects of aggregating in nature. Yet tests of such possibilities are lacking. Cavity-nesting birds provide an interesting test case. They compete aggressively for resources and experience low nest predation rates, which might predict dispersion, but across 19 years of study we found that they commonly aggregate by sharing nest trees. Tree sharing was more common when aspen …
Removal Of Invasive Plants From Pando Exclosure 2018, Marc Coles-Ritchie
Removal Of Invasive Plants From Pando Exclosure 2018, Marc Coles-Ritchie
Aspen Bibliography
On July 10-11, 2018 volunteers and staff from Great Old Broads for Wilderness and Grand Canyon Trust removed invasive plants from the Pando exclosure, a fenced portion of the Pando Clone aspen forest adjacent to Fish Lake, in Central Utah. This area has been fenced to restore a portion of the Pando Clone that has been lacking recruitment for decades, by protecting young aspen from browsing by deer and cattle. We have been removing invasive species for five years from this exclosure.
The 2018 trip included 10 women and one staffer of Great Old Broads for Wilderness, from the states …