A mathematical study of the generation of microseisms by waves at sea

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Assessing drought damage in perennial grass pastures

The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311

Seeding Rate Effects on Forage Mass and Vegetation Dynamics of Cool-Season Grass Sod Interseeded with Sorghum-Sudangrass

Interseeding annual warm-season grasses into perennial cool-season grasses has the potential to increase summer forage mass and nutritive value. Knowledge of how seeding rate affects annual warm-season grass establishment, forage mass, and vegetation dynamics remains limited. From 2016–2017, we conducted a field experiment evaluating the effects of seeding rates on sorghum-sudangrass (Sorghum bicolor x S. bicolor var. sudanense) density and forage mass and on the frequency of occurrence of plant species in cool-season grass sod in Lincoln, NE. The experiment had a completely randomized design consisting of six replicates of four seeding rates [0, 14, 28, and 35 kg pure live seed (PLS) ha-1] in sod mowed at a 2.5-cm height and one unseeded, non-mowed control treatment. Sorghum-sudangrass establishment increased with seeding rate from an average of 20 to 45 plants m-2 as the seeding rate increased from 14 to 35 kg PLS ha-1. Forage mass depended on a seeding rate x harvest interaction, showing positive linear and cubic responses to seeding rate in consecutive harvests at 45 and 90 d after interseeding. To increase forage mass in perennial cool-season grass sod, producers should interseed sorghum-sudangrass with at least 28 kg PLS ha-1. One-time seedings into cool-season, perennial grass sod have no residual effects on subsequent forage mass and vegetation dynamics

The Value of Grazed Corn Residue for Crop and Cattle Producers

The Western Corn Belt has historically been corn and wheat cropping systems with cattle integrated on nearby grasslands. Recent agricultural production data ranked Nebraska, South Dakota, Kansas, and North Dakota in the top 10 states for both corn and beef cattle production in the United States. In 2017, these four states had about 20% of the beef cow inventory in the United States with Nebraska alone having 1.9 million beef cows (USDA National Agricultural Statistics Service, 2018). Forage-based livestock production is a fundamental component of these agricultural economies. However, a large quantity of grasslands in this region were converted into annual crops during the mid-2000s (Wright and Wimberly, 2013). To maintain the efciencies of beef cattle production systems, synergistic use of forage resources in a sustainable manner is essential. In addition to grasslands, this includes the complementary use of corn residue for grazing during the winter months. In this article, we provide an economic assessment of current corn residue grazing in Nebraska as well as some comparisons to Kansas, South Dakota, and North Dakota

Ag Lenders Panel Provides Insight into Beef Systems Initiative

In 2017, the University of Nebraska-Lincoln Institute of Agricultural and Natural Resources (IANR) and Nebraska Extension made a commitment to implement a multidisciplinary Beef Systems Initiative (BSI). The BSI is administered by the Center for Grassland Studies and is comprised of six projects designed to develop and support the implementation of beef production systems that optimize feed resource use, natural resource conservation, and producer success in Nebraska through improved management of perennial grasslands and systems of integrated crop-beef cattle production. In addition to the BSI, a parallel project funded by the Foundation for Food and Agriculture Research (FFAR) is studying the best practices for incorporating beef cattle into cropping systems while improving ecosystem services to ensure sustainability. Both of these efforts include components focused on producer and community outreach through Nebraska Extension. To this end, an agricultural lenders panel and five geographically identified producer panels have been formed to provide input and feedback on the project results as they become available. Recently, the lenders panel met for the first time to provide their perspectives about the important information that should be communicated to producers who are considering developing an integrated beef enterprise

Sustaining Grass-Legume Pastures for Cow-Calf Herds: A Case Study

An on-going pasture demonstration study has been used since 1988 to demonstrate methods to improve pasture production for small beef cow-calf herds. Many cattle enterprises are not economically viable because poor management decisions lead to excessive stocking rate, ineffective fertilisation programmes etc., leading to a dependence on hay purchases. The initial objective, continued until 2001, was to maintain one cow- calf pair per ha without purchasing forage or grain produced off farm. More recently, reducing the dependence on harvested forage has been added as an objective

Pasture recovery following drought

The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311

Production and management of Old World bluestems

The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311

Reducing winter feeding costs

The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311