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Articles 1 - 12 of 12
Full-Text Articles in Physical Sciences and Mathematics
Monitoring Subsurface Drainage Flow At Remote Locations, Stephen R. Workman, Stephen F. Higgins, Scott A. Shearer
Monitoring Subsurface Drainage Flow At Remote Locations, Stephen R. Workman, Stephen F. Higgins, Scott A. Shearer
Biosystems and Agricultural Engineering Faculty Publications
Laboratory evaluations and field results are presented for a slotted weir used to measure discharge from subsurface drains. The head–discharge curve for the vertical slot is a simple power function with an exponent of 1.5. There was excellent agreement (r2 > 0.99 and 1:1 slope) between predicted and observed discharge in laboratory testing of 12 test weirs representing five slot widths. The primary advantages of the vertical slot weir are its simplicity, ease of maintenance, and ability to measure small flow rates. Disadvantages include a tendency for the slot to close a small amount over time as a result of …
Determining Matric Stress With The Modified Cam Clay Energy Relationship, Richard A. Rohlf, Larry G. Wells
Determining Matric Stress With The Modified Cam Clay Energy Relationship, Richard A. Rohlf, Larry G. Wells
Biosystems and Agricultural Engineering Faculty Publications
The stress generated by matric suction, or matric stress, was determined at points along the stress path with an analytical and experimental procedure based on the modified Cam clay energy relationship. Matric stress was found to be approximately constant at large strain for constant water content triaxial compression tests. Matric stress was included in both shear and volume relationships in a critical–state soil model that employed the modified Cam clay yield function. Shear was modeled with a constant matric stress. Slope of the normal compression and recompression lines was adjusted for matric stress using a state function that expressed matric …
Alfalfa As A Cash Hay Crop, John Nowak
Alfalfa As A Cash Hay Crop, John Nowak
Kentucky Alfalfa and Stored Forage Conference
Over the years we have all learned of the great potential alfalfa has as a forage crop in Kentucky. We have seen it used as hay, haylage and even pasture. Many aspects of our agri-business community have alfalfa as an important part of their business.
Alfalfa For Beef Cattle, W. Roy Burris
Alfalfa For Beef Cattle, W. Roy Burris
Kentucky Alfalfa and Stored Forage Conference
Alfalfa is sometimes said to be "too good" for beef cattle. Although it's nutritional value may sometimes exceed beef cows' needs, to dismiss it's potential for beef cattle would be a mistake. Alfalfa can be useful as a harvested feed or as a grazing crop.
Alfalfa For Dairy Cattle, Donna M. Amaral-Phillips
Alfalfa For Dairy Cattle, Donna M. Amaral-Phillips
Kentucky Alfalfa and Stored Forage Conference
Alfalfa is known as the queen of the forage crops and for good reasons. Alfalfa is an excellent forage for dairy cattle because it provides nutrients needed by dairy cows in a package which is highly digestible and cost effective. Alfalfa can be grazed directly by cattle or harvested as hay, haylage, or batage. Dairy farmers will purchase locally-grown hay if it is high quality (RFV greater than 150). When marketing cash hay one needs to understand that the quality of alfalfa greatly impacts milk production and economics of a dairy operation. This impact is felt even when as little …
Alfalfa Hay For Horses, Laurie Lawrence
Alfalfa Hay For Horses, Laurie Lawrence
Kentucky Alfalfa and Stored Forage Conference
Horse owners frequently mention cleanliness, color and cutting when it comes to choosing hay. Cleanliness should be the most important factor in selecting horse hay. Hay that contains dust or mold can inflame the respiratory tract. It is also possible for hay mold to affect other systems in the horse such as the digestive system and liver. Some horses suffer from a chronic respiratory condition that seriously impairs their ability to breathe normally. This condition, commonly known as heaves, worsens when horses are fed moldy or dusty hay. Horses with heaves are exercise intolerant and thus have little value except …
Reducing The Risk Of Bloat, Patty Scharko
Reducing The Risk Of Bloat, Patty Scharko
Kentucky Alfalfa and Stored Forage Conference
Bloat refers to excessive accumulation of gas in the rumen. Bloat results when an animal can not eructate or "belch up" gases produced in the process of rumen fermentation. The gas may be in the free form or may be mixed with rumen contents in the form of froth. It occurs both on pasture and in feedlots and can be a major cause of death in cattle wherever intensive farming is practiced. Additional losses can include decreased milk production and reduced rate of gain. Although legumes may increase the opportunity for bloat to occur, fear of bloat should not keep …
Grazing Alfalfa: Is It Right For You?, Jimmy C. Henning
Grazing Alfalfa: Is It Right For You?, Jimmy C. Henning
Kentucky Alfalfa and Stored Forage Conference
Grazing alfalfa can be a very profitable and valuable practice for many Kentucky farmers. How do you know if this practice will work for you? First, you must be able to grow alfalfa. Second, you must address the concerns that are specific to grazing alfalfa.
Establishing Alfalfa Using No-Till Techniques, Gary Bates
Establishing Alfalfa Using No-Till Techniques, Gary Bates
Kentucky Alfalfa and Stored Forage Conference
There have been many changes in agriculture over the fast 50 years. One of the greatest has been the use of no-tiff planting methods. The development of drill and herbicides has made no-till seedings as successful as seeding into prepared land.
Am-Pm Cutting Of Alfalfa, Garry D. Lacefield, Michael Collins, Jimmy C. Henning
Am-Pm Cutting Of Alfalfa, Garry D. Lacefield, Michael Collins, Jimmy C. Henning
Kentucky Alfalfa and Stored Forage Conference
Over the past twenty years of this Conference we have spent considerable time discussing "Alfalfa Harvest Management." We have discussed the importance of stage of maturity and its impact on quality on many occasions. We have presented research on many aspects of hay and haylage management. An overall theme for all the discussions has been "harvest for quality," with emphasis on saving the leaves during the entire harvesting process. Our recommendations have, are, and will continue to be centered around those management practices that will result in the greatest opportunity for preserving alfalfa quality from standing crop to feeding. This …
Can We Follow Alfalfa With Alfalfa?, Monroe Rasnake
Can We Follow Alfalfa With Alfalfa?, Monroe Rasnake
Kentucky Alfalfa and Stored Forage Conference
The question of how soon alfalfa can safely be reseeded following an old stand of alfalfa has been debated for many years. It has been a topic of the Kentucky Alfalfa Conference on at least two other occasions (Rasnake, 1995; Rasnake 1999). Recent research has attempted to determine what causes the problem, how it is affected by soil conditions, and whether the problem can be reduced through plant breeding. This paper will review some of the research.
Foreword [2001], Garry D. Lacefield
Foreword [2001], Garry D. Lacefield
Kentucky Alfalfa and Stored Forage Conference
This is the front matter of the proceedings.