Soil Science Commons^™

A Chemical And Morphological Study Of Soils At The Cal Poly Vineyard, Glade A. Dlott

Natural Resources Management and Environmental Sciences

Despite cultivation for close to a decade, the soils at the Cal Poly vineyard have never been studied in detail. This study was designed to gain a better understanding of the soils for better management. Soil pits and auger holes were dug throughout the site to accurately classify soils. Soils were classified using USDA-NRCS Soil Taxonomy, and samples were taken from each horizon of each soil pit for chemical analysis. Four soil map units were delineated on the site. The pH, EC, total percent carbon and nitrogen, and plant available nitrate, sulfate, phosphate, base cations, and metal micronutrients of each …

Quantifying Pedogenic Carbon Content Within The Boise River Terraces Using Pressurized Calcimetry, Dawn Jarrels, Annika Quick, Jennifer L. Pierce

College of Arts and Sciences Poster Presentations

Soil carbon is the third largest carbon pool within the global carbon cycle; however, soil carbon amounts are not well quantified, and exchange rates of soil carbon are not well understood. Soil carbon can be divided into organic carbon and inorganic carbon, where inorganic carbon (pedogenic carbonate) is precipitated during soil formation and accumulates over time in semi-arid and arid environments. Calcic soils within the semiarid regions of the Boise Valley result from active pedogenic accumulation of secondary CaCO₃ resulting in prominent 'caliche' layers in soils formed on many of the Boise River terraces. The larger goals of this …

Strawberry Growth, Yield, Fruit Nutrition, And Control Of Verticillium Wilt With Pre-Plant Soil Fumigants, Ozone, And Biological Control, Justin J. Scurich

Master's Theses

Verticillium wilt is a widespread soilborne disease of strawberry historically controlled by soil fumigation with methyl bromide (MB). MB was banned by the United Nations in 1995 and will be completely phased out by 2015. Research has concentrated on alternative methods of disease control without finding a single alternative able to replace MB in widespread disease control and yield increase. For the current study, strawberries were greenhouse grown in container pots filled with soil from both infested and non-infested areas of a commercial strawberry field in Watsonville, CA. Treatments included pre-plant soil fumigation with commercially available formulations of methyl bromide, …

Evaluation Of Hydraulic Conductivity Of Non Aqueous Phase Liquids In Partially Saturated Soils, Chijioke Ekeleme Akamiro

Civil & Environmental Engineering Theses & Dissertations

This study seeks to investigate a problem of predicting the hydraulic conductivity of NAPLs in partially saturated soils and to relate the hydraulic conductivity to basic soil parameters that are either easy to determine or are in wide use. To evaluate hydraulic conductivity in partially saturated soils, previous researchers have focused on flow geometry, soil and chemical properties, etc. used in CHEMFLO program by Nofziger et al., (1989) and saturation equations by such authors as Van Genutchen (1980) and Brooks and Corey (1964). Among those, the soil-water characteristic curve (SWCC) is the most widely used constitutive relations for unsaturated soils …

Implications For Old-Field Restoration: Diversity And Abundance Of Arbuscular Mycorrhizal Fungi In Soils Of Restored York Gum (Eucalyptus Loxophleba Subsp. Loxophleba) Sites Vs. Remnants., Jessica Wong

Independent Study Project (ISP) Collection

Arbuscular mycorrhizal fungi (AMF) may be critical to the restoration of ecosystem function in old-fields. Whether the diversity of the plant community is promoted by the AMF community or is the driving force of AMF diversity is unknown. We investigated two questions in the context of old-field restoration in southwestern Australia: 1) Does restoration of the plant community achieve the restoration of AMF and 2) Is AMF species diversity and abundance influenced by the plant species composition? Our study sites were located in the Ridgefield Experiment in the University of Western Australia’s “Future Farm”. Soil samples were collected from beneath …

Surficial Redistribution Of Fallout 131iodine In A Small Temperate Catchment, Joshua D. Landis, Nathan T. Hamm, Carl E. Renshaw, W. Brian Dade, Francis J. Magilligan, John D. Gartner

Dartmouth Scholarship

Isotopes of iodine play significant environmental roles, including a limiting micronutrient (¹²⁷I), an acute radiotoxin (¹³¹I), and a geochemical tracer (¹²⁹I). But the cycling of iodine through terrestrial ecosystems is poorly understood, due to its complex environmental chemistry and low natural abundance. To better understand iodine transport and fate in a terrestrial ecosystem, we traced fallout ¹³¹iodine throughout a small temperate catchment following contamination by the 11 March 2011 failure of the Fukushima Daiichi nuclear power facility. We find that radioiodine fallout is actively and efficiently scavenged by the soil system, where it …

Changes In Run-Off And Groundwater Under Saltbush Grazing Systems: Preliminary Results Of A Paired Catchment Study, D L. Bennett, Richard J. George Dr, Richard Silberstein

Resource management technical reports

No abstract provided.

Farmer Panel--Getting More From Your Alfalfa, Charles Powell

Kentucky Alfalfa and Stored Forage Conference

Powell Farms started in 1996 with 15 acres of Alfalfa hay intended for cow/calf feed. A neighbor and his friends bought every bale that year. Over the next 14 years the only alfalfa hay our cows got to eat was when a cutting got wet and was rolled. Production per acre was good, demand exceeded production and price per bale continued to rise. Roundup Ready came on the market and we were finally able to produce clean pure high quality alfalfa. All was going well for our alfalfa business. Then came the 2008 challenge with the economic down turn, drought …

Farmer Panel--Managed Grazing And Profits, Bill Payne

Kentucky Alfalfa and Stored Forage Conference

Profits are the goal of any business model and mine is no exception. My plan assumes that available natural resources are efficiently utilized in a responsible manner.I have chosen to implement that plan by producing, managing and marketing our forage resources by utilizing Management Intensive Grazing (MIG.)

Farmer Panel--Managing A Commercial Hay Farm, Clayton Geralds

Kentucky Alfalfa and Stored Forage Conference

In his presentation Clayton will discuss equipment he utilizes for establishing, maintaining, and harvesting top quality horse hay. He will also provide an overview of his expectations for yield and quality of his product as well as proper input and storage requirements.

Role And Importance Of Alfalfa In Beef Diets, Jeff Lehmkuhler

Kentucky Alfalfa and Stored Forage Conference

Alfalfa is often referred to as the “Queen” of forage. Is this because of its high fertility needs and more finicky soil fertility needs along with greater management for optimal growth and persistency? Or is it because of it being on top of nearly all other forages for yield and quality? Truth be told, it is likely a combination of all these factors. Alfalfa is a versatile forage as it can be harvested for hay or silage and also grazed with proper management. For these reasons, this forage can fit well in beef operations.

Alfalfa Hay For Horses, Robert Coleman

Kentucky Alfalfa and Stored Forage Conference

When horse owners consider hay for their horses, a number of criteria are generally considered. Of major importance is the hay must be free of mold and dust. It needs to contain nutrients needed by the horse and it must be palatable. If these criteria are met, the type of hay should not matter. However, that is not the case with many horse owners. When discussing the selection of hay, many owners first consider the type of hay. Can it be alfalfa or should it be a grass or how about a mix of grass and a legume. If a …

National Alfalfa & Forage Alliance, Beth Nelson

Kentucky Alfalfa and Stored Forage Conference

The National Alfalfa & Forage Alliance (NAFA) was formed on April 6, 2006. Its membership consists of state/regional seed associations, state/regional hay associations, genetic suppliers, seed marketers, allied industry, and research/extension affiliates. Each of these industry segments has representation on the NAFA board of directors.

Status And New Developments In Seed Coatings, Bill Talley

Kentucky Alfalfa and Stored Forage Conference

The acceptance and use of coated alfalfa seed has become the standard of how alfalfa seed is being sold. Coated seed, refers to a buildup in coating material of 10-34%. Seventy percent of proprietary alfalfa seed is now buildup coated, and 80 % of that amount is a 34% coating. The remaining is a 10% buildup and is usually only used as a carrier for inoculation and fungicide. The higher buildup coatings are able to carry more active ingredients that also enhance the agronomic benefit to the young seedling. The benefits to the young seedling, from the components of the …

Kentucky Department Of Agriculture Hay Testing Program, Kim Field

Kentucky Alfalfa and Stored Forage Conference

The Kentucky Department of Agriculture offers a forage testing service which provides nutritional and energy value information. A Kentucky Department of Agriculture staff member will take sample(s) of hay and/or haylage at the farm and analyze them in the Kentucky Department of Agriculture Forage Laboratory located in Frankfort. Tested forages can mean higher profit, whether feeding cattle, horses, goats, sheep or other livestock. By knowing the nutritional and energy value, you can minimize your cost and maximize your production.

Marketing Quality Hay, Tom Keene

Kentucky Alfalfa and Stored Forage Conference

When marketing quality alfalfa hay, you basically have two markets that you are going to try to target. First, you are going to be in the cash hay market, that’s where you will sell alfalfa hay to several different entities…..locally, statewide, nationally, or potentially internationally. Secondly, and more commonly, you will be marketing your hay to your own livestock enterprise on your farm. Several times every month, I have people call me and ask me what their hay is worth. I tell them very honestly I have no idea what their hay is worth; only by keeping track of their …

How Are Roundup Ready Varieties Performing, S. Ray Smith

Kentucky Alfalfa and Stored Forage Conference

Roundup Ready® Alfalfa

The most significant new development in alfalfa varieties was the January 27, 2011 decision by USDA to deregulate Roundup Ready® Alfalfa (RRA) without conditions. This was the final step in an extensive environmental review process by the USDA that took place over a 4 year period of time. If you would like to know more about the safety of Roundup Ready® Alfalfa you can review the complete Environmental Impact Statement at: http://www.aphis.usda.gov/biotechnology/downloads/alfalfa/gt_alfalfa%20_feis.pdf.

Most importantly, seed dealers in Kentucky and surrounding states now have Roundup varieties available for sale.

Getting More From Your Alfalfa, Garry D. Lacefield

Kentucky Alfalfa and Stored Forage Conference

Today marks the 32nd consecutive year we have come together to discuss alfalfa and its role on your farm, in Kentucky, and our nation. Over these 32 years we have discussed many topics and seen many advances, unfortunately we aren’t making progress relative to acres, yield and quality that I would like to see. Maybe I am getting impatient as I am actually thinking about retirement. Now wait, you are one step ahead of me. I know you are thinking he has shown many graphs, tables and charts over the years showing how we have improved and yes, I know …

Foreword And Recipients Of Kentucky Alfalfa Awards [2012], Garry D. Lacefield, Christi L. Forsythe

Kentucky Alfalfa and Stored Forage Conference

No abstract provided.

The Ecology Of Pulse Events: Insights From An Extreme Climatic Event In A Polar Desert Ecosystem, U. N. Nielsen, D. H. Wall, B. J. Adams, R. A. Virginia

Dartmouth Scholarship

Climate change is occurring globally, with wide ranging impacts on organisms and ecosystems alike. While most studies focus on increases in mean temperatures and changes in precipitation, there is growing evidence that an increase in extreme events may be particularly important to altering ecosystem structure and function. During extreme events organisms encounter environmental conditions well beyond the range normally experienced. Such conditions may cause rapid changes in community composition and ecosystem states. We present the impact of an extreme pulse event (a flood) on soil communities in an Antarctic polar desert. Taylor Valley, McMurdo Dry Valleys, is dominated by large …