This is the first in a series of factsheets on the wildlife, ecology, and landscape of the Thunder Basin National Grassland in northeastern Wyoming.
The efficient use of water resources in agriculture requires adequately quantifying the water use, i.e. ET, which represents the main consumptive use of water in agricultural production. ET represents direct response in terms of water losses from the field as a function of soil, water, and crop management and climatic conditions and is a powerful indicator of crop water productivity. Therefore, it is important to understand and accurately quantify ETc, which further can help farmers to use reliable information and tools to make better irrigation decisions. This bulletin describes the basic concept of evapotranspiration and defines the major difference between commonly used ET terms, mainly PET, ETref, and ETc. A common understanding of these terms will help to understand the fundamental ET process and to better communication among producers, extension educators, and researchers.
Body condition scores or BCS are a systematic approach to quantifying the energy reserves of beef cattle grazing on rangeland and pastureland. Changes in these fat and muscle reserves are visually noticeable and are an indication of the nutritional status of the animal, rangeland forage conditions, and reproductive performance. Key times to score cattle are prior to calving, prior to breeding, and at weaning. This is often done 100 days before calving and 60 days before breeding. Body condition of beef cattle are judged on a scale of 1-9 (with 1 being emaciated, 5 being ideal, and 9 being obese). This 3-step guide is an easy to use and practical approach to determining body condition scores of cattle and will assist ranchers in making management decisions.
Use of Pseudomonas fluorscens as a bioherbicide for cheatgrass and other invasive winter annual grass control
Work over the past 15 years has identified unique strains of the ubiquitous soil bacteria Pseudomonas flourescens to control invasive annual grasses. These strains were originally identified from wheat fields in Washington with annual grass injury. From those, specific strains were identified that are reported to only affect certain invasive annual grasses. These strains colonize intercellular space in the roots of the target invasive annual grass and reduce plant growth by inhibiting root cell membrane production. This results in stunting of the target plant. There are currently two strains potentially being utilized as bioherbicides, D7 and ACK55.
Publications listed in this catalog are available from the University of Wyoming College of Agriculture and Natural Resources through the University of Wyoming Extension and the Wyoming Agricultural Experiment Station. The catalog is updated throughout the year.