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The Study Of Alfalfa (Medicago Sativa) Production In The Community Of El Troje, Juan Leopoldo Penafiel Alvarado

Theses and Dissertations

The alfalfa harvest in Ecuador constitutes one of the most important activities, especially as a primary product for animal feeding. The crop is widely distributed in the mountain region of the country. It is important to have studies on the production systems, which facilitate a real and compete vision of those characteristics that interact among them in the agricultural production. With this knowledge it will be possible to look for the most adequate solutions to the conditions of the area where alfalfa is produced. The objectives of the study reported herein were: 1. To make an agricultural, social and economical …

Structure Of The Avian Oviduct With Emphasis On Sperm Storage In Poultry, Murray R. Bakst

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The macroanatomy, histology, and fine structure of the avian oviduct is reviewed and related to its role in fertile egg production. The avian oviduct functions as a biological assembly line, beginning sequentially with the deposition of the albumen around the fertilized or unfertilized ovum, then the shell membrane, and lastly, the shell, all within 25 hr of ovulation. While in transit through the oviduct, the fertilized ovum progresses to the pre-gastrulation stage of development.

Comparative Gene Mapping: Cytogenetic Localization Of Proc, En1, Alpi, Tnp1, And Il1b In Cattle And Sheep Reveals A Conserved Rearrangement Relative To The Human Genome, N. L. Lòpez-Corrales, T. S. Sonstegard, T. P. L. Smith

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The cytogenetic locations of the genes for protein C (PROC), transition protein 1 (TNP1), intestinal alkaline phosphatase (ALPI), engrailed (EN1), and human protointerleukin ß (IL1B) have been compared between cattle (Bos taurus, BTA) and sheep (Ovis aries, OAR). Bovine YAC and cosmid clones were used as FISH probes to determine the order (centromere to telomere) of four of these genes on OAR 2q, as well as the location of IL1B on OAR 3p. In cattle, IL1B and EN1 were assigned to BTA 11 and BTA 2, respectively. Alignment of the ovine, bovine, and human physical maps …

Biological Control: An Important Component In Integrated Management Of Musca Domestica (Diptera: Muscidae) In Caged-Layer Poultry Houses In Buenos Aires, Argentina, Diana C. Crespo, Roberto E. Lecuona, Jerome A. Hogsette

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

An Integrated Management program to control Musca domestica L. was developed by evaluating cultural + chemical control, cultural + biological control + granular bait (IMP 1), and cultural + chemical + biological control + granular bait (IMP 2) in poultry houses in Argentina. Adult fly density was estimated by a modified Scudder-grid method. Percentage of house fly parasitism was estimated by direct and indirect methods. Spalangia endius Walker and Muscidifurax raptor Girault & Sanders were released at a rate of 10 parasitoids/hen/week. Complete absence of control practices allowed a sustained growth of the fly population. When larvicides and adulticides were …

Purification And Characterization Of Intrauterine Folate-Binding Proteins From Swine, J.L. Vallet, R.K. Christenson, H.G. Klemcke

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Folate-binding proteins (FBP) from Day 60 pseudopregnant uterine flushings and Day 60 allantoic fluid were purified by affinity chromatography on folate-Sepharose followed by G–100 Sephadex chromatography. FBP from uterine flushings had a molecular weight of 20 000; the N-terminal sequence was FNWDHXGKMEPAXKRHFXXXTXLYX, which is 72% identical to bovine milk FBP beginning at amino acid 64. Allantoic fluid FBP had a molecular weight of 30 000; and the N-terminal sequence ARAKTDMLNVXMDAKHHKPKPSXED, which is 68% identical to bovine milk FBP starting at amino acid 4. Scatchard analysis of purified allantoic fluid FBP using [³H]folic acid as ligand indicated a dissociation …

Fecal Coliform Transport Through Intact Soil Blocks Amended With Poultry Manure, S. W. Mcmurry, Mark S. Coyne, E. Perfect

Plant and Soil Sciences Faculty Publications

Poultry production in Kentucky increased almost 200% between 1991 and 1995. Their waste is typically land applied, and fecal pathogen runoff and infiltration may cause nonpoint source groundwater pollution. We looked at the preferential flow of fecal coliforms through undisturbed soil blocks since fecal bacteria typically infiltrate the soil profile to contaminate groundwater. Poultry manure was uniformly distributed on top of sod-covered or tilled (upper 12.5 cm) soil blocks and the blocks were irrigated. Drainage was collected in 100 uniformly spaced cells beneath each block and analyzed for fecal coliform content and drainage volume. The spatial distribution of drainage and …

Western Australian Agriculture - Key Achievements 1997-1998, Department Of Primary Industry And Fisheries, Western Australia

Farm Systems and Economics published reports

During the past year the agriculture sector continued to be one of the most innovative and significant contributors to the Western Australian economy. In 1996/97 the value of agricultural exports reached $4.6 billion, having doubled in five years.

Not only does agriculture contribute directly to the State's financial position but farm expenditure is estimated to have a three-fold multiplier effect, thereby having a wide impact on the social well-being of Western Australians.

Increasingly, international trade is being linked to environmental performance. Accordingly, the Government has cemented sustainable farming as a cornerstone of the industry's and Agriculture WA's activities, thereby ensuring …

Plant Hemoglobins, Raul Arrendondo-Peter, Mark S. Hargrove, Jose F. Moran, Gautam Sarath, Robert V. Klucas

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Hbs are ubiquitous proteins in most organisms, including bacteria, protozoans, fungi, plants, and animals (Vinogradov et al., 1993; Bolognesi et al., 1997). The known and predicted roles of Hbs in each organism encompass functions that include the reversible binding of gaseous ligands and the ability to bind other cellular molecules.

Selective And Organotypic Culture Of Intrahepatic Bile Duct Cells From Adult Pig Liver, Neil C. Talbot, Thomas J. Caperna

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Secondary culture of nontransformed bile duct epithelium has been difficult to achieve. STO feeder cell-dependent secondary cultures of adult pig bile duct cells were established from primary cultures of adult pig liver cells. Adult pig hepatocytes exhibited limited or no replication and were lost from the secondary culture at Passage 3 or 4. In contrast, adult pig bile duct cells replicated and were carried for 4-8 passages in secondary culture. A simple method to produce nearly pure pig intrahepatic bile duct cultures was first to freeze a relatively crude liver cell preparation. Upon subsequent thawing, all hepatocytes and most macrophages …

Tiller Demographics And Leaf Area Index Of Four Perennial Pasture Grasses, Robert B. Mitchell, Lowell E. Moser, Kenneth J. Moore, Daren D. Redfearn

Department of Agronomy and Horticulture: Faculty Publications

Developing grazing systems requires basic information on the growth and development of adapted species. The objective of this field study was to determine seasonal tiller demographics and leaf area index (LAI) of intermediate wbeatgrass [Thinopyrum intermedium (Host) Barkw. & D.R. Dewey], smooth bromegrass (Bromus inermis Leyss.), switchgrass (Panicum virgatum L.), and big bluestem (Andropogon gerardii Vitman) tiller populations. This study was conducted in 1992 and 1993 near Mead, NE, on a silty clay loam soil (Typic Argiudoll) as a randomized complete block. Monocultures were harvested six times each year for tiller demographics. Additionally, mean stage count …

The ‘‘Foliage Is The Fruit’’ Hypothesis: Complex Adaptations In Buffalograss (Buchloe Dactyloides), John Ortmann, Walter H. Schacht, James L. Stubbendieck, Dennis R. Brink

Department of Agronomy and Horticulture: Faculty Publications

Buffalograss (Buchloe dactyloides) has been described as an excellent fit for Janzen’s ‘‘Foliage is the Fruit’’ (FF) hypothesis, which suggests that large grazing animals ingest and later disperse seeds of some herbs when consuming their foliage. We tested this hypothesis by feeding buffalograss burs and legume seeds to ruminally fistulated beef steers. Our objectives were to determine (1) rumen residence times of buffalograss burs, free buffalograss caryopses and legume seeds; (2) total tract residence times for the three types of propagules; (3) percentage propagule survival after passage and (4) germinability of fed and unfed burs and caryopses. Bur …

Intrapopulation Sex Ratio Variation In The Salt Grass Distichlis Spicata, Sarah M. Eppley, Maureen L. Stanton, Richard K. Grosberg

Biology Faculty Publications and Presentations

In many dioecious plant populations, males and females appear to be spatially segregated, a pattern that is difficult to explain given its potentially high costs. However, in asexually propagating species, spatial segregation of the sexes may be indistinguishable from superficially similar patterns generated by random establishment of a few genets followed by extensive clonal spread and by gender-specific differences in rates of clonal spread. In populations where a significant fraction of individuals are not flowering and gender cannot be assigned to this fraction, apparent spatial segregation of the sexes may be due to differential flowering between the sexes. We confirm …

Genetic Markers In Plant Evolutionary Ecology, Mitchell B. Cruzan

Biology Faculty Publications and Presentations

Genetic markers have provided plant ecologists with a method of assessing levels of genetic relatedness among individuals and populations. In recent years a number of techniques based on DNA sequence variation have been developed to complement allozyme methods that are already widely used. Some of these new markers are more variable than protein-based markers, allowing more precise estimates of genetic differences among individuals and populations. Other DNA-based markers are based on organelle genomes that are inherited uniparentally. These cytoplasmic markers can provide a method for assessing the separate effects of seed and pollen dispersal on gene flow within and among …

Inactivation Of Soybean Peroxidase During Sodium Azide Oxidation: A Comparative Study, Mohamed Yehia Zakaria Aboul Eish

Dissertations and Theses @ UNI

Azide ion is a mechanism-based inactivator of a number of peroxidases. However, there are often variations in the manner in which inactivation occurs. Soybean Peroxidase (SBP) is found in the plant's seed coat. Unlike many other peroxidases, a single enzyme rather than several isozymes are produced thus making more simple the purification and characterization of the enzyme. In this research it was shown that, as with other peroxidases, SBP is inactivated by azide during turnover. During azide oxidation SBP forms a ferrous-NO intermediate. In this respect, SBP is similar to the lignin peroxidases from Phanerochaete chrysosporium which also form ferrous-NO …

The In Vitro Propagation Of Seagrasses : Halophila Ovalis, Ruppia Megacarpa And Posidonia Coriacea, Melissa Grace Henry

Theses : Honours

Seagrass communities are of high ecological and economic significance. They provide a nursery area for commercial and recreational juvenile fish and crustacea. Seagrasses also play an important role in influencing the structure and function of many estuarine and nearshore marine environments. Unfortunately, the decline of seagrasses, as a result of human impact, has increased in recent years. This decline has become a major problem throughout the world. Current methods used to restore degraded seagrass beds are limited, the most promising being transplanting material from healthy donor beds. This approach is expensive because it is labor intensive and damages the donor …

Hyaluronan Synthase Of Chlorella Virus Pbcv-1, Paul L. Deangelis, Wei Jing, Michael V. Graves, Dwight E. Burbank, James L. Van Etten

Department of Plant Pathology: Faculty Publications

Sequence analysis of the 330-kilobase genome of the virus PBCV-1 that infects a chlorella-like green algae revealed an open reading frame, A98R, with similarity to several hyaluronan synthases. Hyaluronan is an essential polysaccharide found in higher animals as well as in a few pathogenic bacteria. Expression of the A98R gene product in Escherichia coli indicated that the recombinant protein is an authentic hyaluronan synthase. A98R is expressed early in PBCV-1 infection and hyaluronan is produced in infected algae. These results demonstrate that a virus can encode an enzyme capable of synthesizing a carbohydrate polymer and that hyaluronan exists outside of …

The Prairie Naturalist Volume 29, No.4. December 1997

The Prairie Naturalist

BUTTERFLY SPECIES IN NATIVE PRAIRIE AND RESTORED PRAIRIE ▪ D. M. Debinski and A. M. Babbit

BACK-CALCULATED LENGTH-AT-AGE ESTIMATES FROM TWO SCALE RADII ▪ K. L. Hurley, K. L. Pope, and D. W. Willis

DIET OF NORTH DAKOTA ELK DETERMINED FROM RUMEN AND FECAL ANALYSES ▪ R. G. Osborn, J. A. Jenks, and W. F. Jensen

INTERSPECIFIC COMPETITION FOR FOOD BETWEEN WHITE-FOOTED MICE AND EASTERN WOODRATS ▪ B. G. Aloiau, D. M. Post, and E. A. Home

NESTING PIPING PLOVER AND LEAST TERN ON THE KANSAS RIVER ▪ W. H. Busby, D. W. Mulhern, P. G. Kramos, and D. A. …

Agriculture And The Western Australian Economy : Value Added Contribution Of Agricultural Commodities, Nazrul Islam

All other publications

No abstract provided.

Southeast South Dakota Experiment Farm Annual Progress Report, 1997, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This thirty-seventh annual report of the research program at the Southeast South Dakota Experiment Farm has special significance for those engaged in agriculture and the agriculturally related businesses in the nine county area of southeast South Dakota. Reports in this document include information on: temperatures and precipitation data, corn production and performance, soybean research and planting, soil testing, alfalfa yield test, fertilizer testing, herbicide research, crop rotation, sorghum, small grains, livestock research, and pest and weed control.

Nebraska Range Shortcourse: A Successful Approach To Continuing Education, Daniel R. Vaughn, Anthony D. Watson, Lowell E. Moser, Walter H. Schacht

Department of Agronomy and Horticulture: Faculty Publications

Casual visitors to Nebraska rarely see the diversity of the 23 million acres of its rangeland. The state boasts of its nonparalleled range beef cattle industry which relies heavily on the Sandhills, a seemingly endless expanse of grass-covered dunes. In sharp contrast to the Sandhills, however, is a wide array of landscapes including the pine ridge of northern Nebraska, the sagebrush grassland of the southwestern region, the shortgrass prairie of the panhandle, the highly-dissected loess hills, and wooded river valleys. These landscapes offer a complex mixture of habitats, recreational opportunities, rangeland products, and management challenges. People with varied education and …

Silvopasture: An Agroforestry Practice, Ned B. Klopfenstein, W. J. Rietveld, Richard C. Carman, Terry R. Clason, Steven H. Sharrow, Gene Garrett, Bruce Anderson

Agroforestry Notes (USDA-NAC)

Although some form of silvopasture management has been practiced for centuries, silvopasture as an agroforestry practice is specifically designed and managed for the production of trees, tree products, forage, and livestock. Silvopasture results when forage crops are deliberately introduced or enhanced in a timber production system, or timber crops are deliberately introduced or enhanced in a forage production system. As a silvopasture, timber and pasture are managed as a single integrated system.

Silvopastoral systems are designed to produce a high-value timber component, while providing short-term cash flow from the livestock component. The interactions among timber, forage, and livestock are managed …

Forest Farming: An Agroforestry Practice, Mary Ellen Dix, Deborah B. Hill, Louise E. Buck, W. J. Rietveld

Agroforestry Notes (USDA-NAC)

Most public and private forest lands of North America have been modified to varying degrees from years of human activity. Certain high-value ‘non-timber forest products’ have been over-exploited and are difficult to find. Forest farming practices can be used by private enterprise to grow desirable non-timber forest products on private lands, to supplement family income, and to allow biodiversity to reestablish within forests.

The Biology Of Silvopastoralism, Steven H. Sharrow

Agroforestry Notes (USDA-NAC)

Forestry and livestock grazing are common competing uses for non-irrigated lands around the world. Forest grazing is a traditional practice in most of North America. Approximately 25 percent of all US forest land is grazed by livestock. Young forests and mature open-canopied forests can provide considerable amounts of forage for livestock. Prescription grazing makes beneficial use of ground vegetation that would otherwise compete with trees for soil moisture and nutrients, harbor gnawing rodents, and pose a fire hazard. Pasture grasses and legumes are sometimes seeded into newly harvested forest areas to reduce erosion, to provide high-quality food for deer and …

Nebline, November 1997

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Seven highly effective habits for holiday food safety
Lancaster County Extension Educator receives national awards
Hints for fruit storage
Rodent damage
Houseplants from seed
Plants have many roles
Pesticide storage
Timely care of hardy chrysanthemums
Forcing bulbs
Squirrels are busy preparing for cold winter days ahead
The big sleep
Building with recycled materials a sound business practice
The repellency of hedge apples: an old wives tale
Caulking cracks and crevices prevents entry by many pests
America unbugged: fast facts about bug fears and fascinations
Reduce hay losses during storage
Control winter annual weeds in dormant alfalfa
Introducing Beef Basics IV …

Growing Degree-Days: One Equation, Two Interpretations, Gregory S. Mcmaster, Wallace Wilhelm

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Heat units, expressed in growing degree-days (GDD), are frequently used to describe the timing of biological processes. The basic equation used is GDD = [(T_MAX + T_MIN)/2] - T_BASE where T_MAX and T_MIN are daily maximum and minimum air temperature, respectively, and T_BASE is the base temperature. Two methods of interpreting this equation for calculating GDD are: (1) if the daily mean temperature is less than the base, it is set equal to the base temperature, or (2) if T_MAX or T_MIN < T_BASE they are reset equal to T …

Ua66/5 Newsletter, Wku Agriculture

WKU Administration Documents

Newsletter created by WKU Agriculture Department re: faculty/staff, students/alumni, student organizations and clubs and donors.

Center For Grassland Studies Newsletter, Fall 1997, Volume 3, No. 4

Center for Grassland Studies: Newsletters

Contents:

The Nebraska Gap Analysis Project: Geographic Information for Land Resource Managers by Marlen Eve and James Merchant, Conservation and Survey Division, University of Nebraska-Lincoln

1998 Nebraska Range Shortcourse by Lowell Moser, Department of Agronomy, University of Nebraska-Lincoln

The Konza Prairie: Our Tallgrass Neighbors by Rob Peters, formerly with The Land Institute, Salina, Kansas

Festival of Color Draws 9,000 This Year

Nebline, October 1997

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Celebrate Character Counts! week
Books and activities celebrating the Six Pillars of Character
Caring for fuchsia
Garden poster contest for youth
Potbound
Harvesting popcorn
Clean up that garden
Last 1997 Household Hazardous Waste Collection
Web sights
There's a mouse in the house!
Interested in a variety of experiences?
Consider estate settlement costs early
No-till into alfalfa residual
Farmers need to protect themselves, employees from work-related illnesses
Fall clean-up of warm season grasses
Handling wastewater
Proper electrical wiring helps prevent most farm fires
CRP: blessing or curse?
Food Safety Programs
Safe Food for the Hungry '97--A Focus on Diversity
Diabetes control …

Nebline, September 1997

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Science at its best!4-H School Enrichment
Fall weed control
Drying gourds
Saving geraniums over winter
Storing sweet potatoes
House herbs
Collecting evergreen seeds
1997 Legislature increases penalties for illegal dumping!
Landfill rates increase, but still a bargain
Yellow jackets
Neighborhood clean-up
Frustrated by flies? Here are some helpful tips
Simple fruit fly trap
Sign up now for fall conservation work
County Committee election
Competition, consolidation predicted for grain bin industry
Ag marketing video course: “Agricultural Marketing and Entrepreneurship”
Last cutting of alfalfa
Avoid over-grazing warm-season grasses
Making good silage
Managing water resources
Festival of Color
Focus on Food
Don't Get …

The Chemical Composition And Nutritive Value Of Australian Pulses, S. Sipas, J. B. Mackintosh, D. S. Petterson

Books & book chapters

Grain legumes are the harvested seed of leguminous crops, typically peas, beans and their close relatives within the Fabaceae. Another term for many of these crops is pulses. In Australia, generally grain legumes are referred to as pulses. The term pulse is derived from the Latin puls meaning that the seed or grain can be made into a thick soup or pottage. The term pulse is most commonly associated with the food legumes whereas grain legumes are mostly associated with the feed industry. The terms are interchangeable, but with few exceptions (notably chickpeas, lentils and mung beans), the majority of …