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The Influence of a Return of Native Grasslands upon the Ecology and Distribution of Small Rodents in Big Bend National Park

Description: In the southwestern United States there is a delicate balance between the existing grasslands and the rodent fauna. The purpose of this investigation was to determine the influence of secondary succession of native grasslands upon the ecology and distribution of small rodents. Two methods of determining the rodent species were plot quadrates and trap lines using Sherman live traps.
Date: August 1971
Creator: Baccus, John T.
Partner: UNT Libraries

Grassland Law of the People's Republic of China

Description: This Law is established in accordance with the provisions of the Constitution of the People's Republic of China with a view to improving the protection, management and development of grasslands and ensuring their rational use; protecting and improving the ecology; modernizing animal husbandry; enhancing the prosperity of local economies of the national autonomous areas; and meeting the needs of socialism and people's livelihoods. The law was adopted at the 11th Meeting of the Standing Committee of the Sixth National People's Congress and promulgated by Order No. 26 of the President of the People's Republic of China on June 18, 1985, and effective as of October 1, 1985
Date: June 18, 1985
Creator: National People's Congress of the People's Republic of China
Item Type: Text
Partner: UNT Libraries

Comparison of IKONOS Derived Vegetation Index and LiDAR Derived Canopy Height Model for Grassland Management.

Description: Forest encroachment is understood to be the main reason for prairie grassland decline across the United States. In Texas and Oklahoma, juniper has been highlighted as particularly opportunistic. This study assesses the usefulness of three remote sensing techniques to aid in locating the areas of juniper encroachment for the LBJ Grasslands in Decatur, Texas. An object based classification was performed in eCognition and final accuracy assessments placed the overall accuracy at 94%, a significant improvement over traditional pixel based methods. Image biomass was estimated using normalized difference vegetation index (NDVI) for 1 meter resolution IKONOS winter images. A high correlation between the sum of NDVI for tree objects and field tree biomass was determined where R = 0.72, suggesting NDVI sum of a tree area is plausible. However, issues with NDVI saturation and regression produced unrealistically high biomass estimates for large NDVI. Canopy height model (CHM) derived from 3-5m LiDAR data did not perform as well. LiDAR typically used for digital elevation model (DEM) production was acquired for the CHM and produced correlations of R = 0.26. This suggests an inability for this particular dataset to identify juniper trees. When points that registered a tree height where correlated with field values, an R = 0.5 was found, suggesting denser point spacing would be necessary for this type of LiDAR data. Further refining of the methods used in this study could yield such information as the amount of juniper tree for a given location, fuel loads for prescribed burns and better information for the best approach to remove the juniper and ultimately management juniper encroachment into grasslands.
Date: December 2009
Creator: Parker, Gary
Partner: UNT Libraries

Experiment Station Work, [Volume] 16

Description: Bulletin issued by the U. S. Department of Agriculture compiling selected articles from the Agricultural Experiment Stations. This bulletin contains articles on: Liming Grass Lands, Early Plowing for Wheat, Grafting Grape Cuttings, Olives, Nuts as Food, Coffee Substitutes, the Working of a Pure-Food Law, Feeding Moldy Corn, Selling Eggs by Weight, Flavor of Eggs, Unfermented Grape Juice.
Date: 1900
Creator: United States. Office of Experiment Stations.
Item Type: Pamphlet
Partner: UNT Libraries Government Documents Department

Experiment Station Work, [Volume] 39

Description: Bulletin issued by the U. S. Department of Agriculture compiling selected articles from the Agricultural Experiment Stations. This bulletin contains articles on: Improvements in Peach Growing, Mulberries, Alfalfa in the Eastern States, Oat Culture in the South, Improvement of Grass Land, Succotash as a Soiling Crop, Tankage and Bone Meal for Hogs, Grinding Corn for Hogs, Dips as Lice Killers, Digestibility of Fish and Poultry, Honey Vinegar, and the Farm Woodlot.
Date: 1907
Creator: United States. Office of Experiment Stations.
Item Type: Pamphlet
Partner: UNT Libraries Government Documents Department

Experiment Station Work, [Volume] 30

Description: Bulletin issued by the U. S. Department of Agriculture compiling selected articles from the Agricultural Experiment Stations. This bulletin contains articles on: Top-Dressing Grass Land, Extension of Corn Growing, Peanuts for Forage, Winterkilling of Fruit Trees, Cranberry Culture, Lime-Sulphur-Salt Wash, Destroying Prairie Dogs, Clean Milk, Poultry Houses.
Date: 1905
Creator: United States. Office of Experiment Stations.
Item Type: Pamphlet
Partner: UNT Libraries Government Documents Department

Grass crops in conservation farming.

Description: Describes the success of grassland improvement methods as demonstrated by experiment stations, agricultural technicians, farmers, and ranchers.
Date: May 1955
Creator: Dale, Tom, 1899- & Brown, Grover F., 1905-
Item Type: Book
Partner: UNT Libraries Government Documents Department

Seeding summer ranges in eastern Oregon and Washington

Description: Describes the benefits and methods of range seeding, and provides a guide to seeding for various range types.
Date: October 1955
Creator: Rummell, Robert S., 1919- & Holscher, Clark E.
Item Type: Book
Partner: UNT Libraries Government Documents Department

[Margaret Crimmins on horseback]

Description: Photograph of Margaret Crimmins on horseback, she and the horse are in a muddy area of an overgrown field.
Date: unknown
Creator: Dalco Photography
Item Type: Photograph
Partner: UNT Libraries Special Collections

An Assessment of the Use of Seeding, Mowing, and Burning in the Restoration of an Oldfield to Tallgrass Prairie in Lewisville, Texas

Description: An examination of the effectiveness of seeding, burning, and mowing in the reestablishment of tallgrass prairie species on overgrazed and abandoned pastureland. The study site is a 20 acre tract on U.S. Corps of Engineers land below Lake Lewisville in Denton County, Texas. The site was partitioned into thirty-nine 40 by 40 meter plots with seeding (carried out in 1996) and management treatment (burning, mowing, and no maintenance carried out in 1998) randomly applied following a two level design. For each plot, nine stratified-random 0.1 m2 subplots were examined and shoot counts for each species recorded. The effects of the treatments on individual species and species richness were analyzed with a two-way ANOVA followed by a SNK multiple range test, both on ranked data. Community level analysis was conducted with both a MANOVA on ranked data and a Canonical Correspondence Analysis on raw data. Results indicate that seeding positively affected species richness, particularly when combined with either burning or mowing in the early spring. Mowing also significantly increased species richness in areas that were not seeded, while burning negatively affected species richness on unseeded plots. Treatments significantly affected community composition with treatments having the most clear effect on spring and summer forbs.
Date: August 1999
Creator: Windhager, Steven
Partner: UNT Libraries

[News Clip: Grass Fire]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story about a grass fire. This b-roll footage includes aerial footage of the affected area. The story aired at 10:00 P.M.
Date: January 12, 1986
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Video
Partner: UNT Libraries Special Collections