Agronomy and Crop Sciences Commons^™

Assessment Of Foam Decontamination In Tomato Washing Process, Basim M. Alohali

Dissertations and Doctoral Documents from University of Nebraska-Lincoln, 2023–

The work of the dissertation investigated the efficacy of foam-based decontamination treatments to enhance microbial safety in Roma tomatoes, specifically targeting natural microflora and Salmonella contamination. Growing concerns over foodborne illnesses linked to fresh tomatoes and the limitations of conventional decontamination techniques, such as organic matter built-up and limited microbial reduction, are addressed. The primary objectives were to characterize the physiochemical properties of foams formed using various concentrations of Tween 20 (T20) and sodium dodecyl sulfate (SDS) with and without the addition of sodium hypochlorite (NaOCl) and peracetic acid (PAA), compare the efficacy of foam and traditional dump tank (DT) …

Influence Of Fertilizer Rate On Swollen Stem Formation (“Bulbing”) And Vitamin C Content In Different Kohlrabi Cultivars, Mark Iradukunda, Paul E. Read

Honors Theses

Kohlrabi (Brassica oleracea Gongylodes Group) is a vegetable crop found in the Brassicaceae, and it is rich in antioxidants such as vitamin C. Vitamin C helps in oxidative damage repair and strengthens the immune system, so exploring vitamin C sources may contribute to improving human health. The objective of this study was to determine the effect of different fertilizer rates on kohlrabi yield, in terms of the swollen stem and the vitamin C content, and if those effects are similar in different kohlrabi cultivars. In this greenhouse study, we fertilized four potted kohlrabi cultivars with a common water-soluble greenhouse fertilizer …

Techniques To Improve The Volume, Texture And Nutritional Quality Of Gluten-Free Bread, Zachary Christman

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

This article highlights the use of soy flour to improve the protein and fiber of gluten free bread. Also, the use of an extrusion process on soybean and corn flour blends improves the volume and texture of the bread. A full listing of the ingredients and method for production of higher quality gluten free bread is included.

Assessment Of Grain Safety In Developing Nations, Jose R. Mendoza

Department of Food Science and Technology: Dissertations, Theses, and Student Research

Grains are the most widely consumed foods worldwide, with maize (Zea mays) being frequently consumed in developing countries where it feeds approximately 900 million people under the poverty line of 2 USD per day. While grain handling practices are acceptable in most developed nations, many developing nations still face challenges such as inadequate field management, drying, and storage. Faulty grain handling along with unavoidably humid climates result in recurrent fungal growth and spoilage, which compromises both the end-quality and safety of the harvest. This becomes particularly problematic where there is little awareness about health risks associated with poor …

Growing Torula Yeast (Candida Utilis) For Food Grade Fatty Acids, Zachary Christman

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

The focus of this article is the cultivation of a food grade yeast for the production of fatty acids without the restrictions of climate or growing season. Torula yeast (Candida utilis) was selected since it can grow on a wide variety of culture media and has over 60 years of use in the food industry. The fatty acid composition of C. utilis grown on two different media are presented in this article; the first example using completely synthetic media and another using distiller’s vinasse. Also, the effect of different culturing conditions on the percentage of various fatty …

A Review Of Technologies For Malt Flour And Sourdough From Brewery Spent Grain, Zachary Christman

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

The utilization of brewer's spent grain for the production of malt flour is the focus of this article. The reader is presented with superheated steam and extrusion as technologies to reduce mycotoxin contamination and improve shelf life. Another option is the fermentation of brewer's spent grain with a cereal grade lactic acid bacteria for the production of sourdough bread. Milling of the brewer's spent grain for the production of bread is also covered.

Introduction To Sorghum Paper Production, Zachary Christman

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Sorghum is a tall grass used for many commercial products such as fodder and syrup. The 10 to 15 feet stalk of the plant has lower lignin than wood and provides a fiber length of 2.31 mm in the outer covering and 1.38 mm for the leaf. Sorghum fiber makes a high quality, strong paper suitable for printing, packaging and paperboard.

The Use Of Grape By-Products As A Nutrient Rich Cattle Feed, Zachary Christman

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

In this article you will learn about how to use the grape stems, skins and pulp that are generated by the wine industry. Ruminant animals such as cattle can digest this inexpensive yet nutrient rich material. The complete process from wine press to cattle feed is covered in this article. The historical background of using grape by-products and methods to preserve this food source is also presented.

Breeding For Resistance In California Strawberry To Verticillium Dahliae, Zachary Christman

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

This article focuses on breeding resistant strawberries to the fungus Verticillium dahliae, common name Verticillium wilt. This is a serious fungal disease that can result in a loss of 50% or more of a strawberry harvest when grown in infested soil. The main goal is to provide an example of how a cultivar can be made more resistant to a plant pathogen with the use of plant breeding methods.

Since 1930 the University of California, Davis, has been developing strawberry cultivars that are adapted to the agricultural industry and regional farms. Developing cultivars that require fewer inputs are of …

Towards The Development Of A Sustainable Soya Bean-Based Feedstock For Aquaculture, Hyunwoo Park, Steven Weier, Fareha Razvi, Pamela A. Peña, Neil A. Sims, Jennica Lowell, Cory Hungate, Karma Kissinger, Gavin Key, Paul Fraser, Jonathan Napier, Edgar B. Cahoon, Thomas Clemente

Center for Plant Science Innovation: Faculty and Staff Publications

Soya bean (Glycine max (L.) Merr.) is sought after for both its oil and protein components. Genetic approaches to add value to either component are ongoing efforts in soya bean breeding and molecular biology programmes. The former is the primary vegetable oil consumed in the world. Hence, its primary usage is in direct human consumption. As a means to increase its utility in feed applications, thereby expanding the market of soya bean coproducts, we investigated the simultaneous displacement of marine ingredients in aquafeeds with soya bean-based protein and a high Omega-3 fatty acid soya bean oil, enriched with alpha-linolenic …

How Good Is Good Enough? Data Requirements For Reliable Crop Yield Simulations And Yield-Gap Analysis, Patricio Grassini, Lenny G.J. Van Bussel, Justin Van Wart, Joost Wolf, Lieven Claessens, Haishun Yang, Hendrik Boogaard, Hugo De Groot, Martin K. Van Ittersum, Kenneth Cassman

Department of Agronomy and Horticulture: Faculty Publications

Numerous studies have been published during the past two decades that use simulation models to assess crop yield gaps (quantified as the difference between potential and actual farm yields), impact of climate change on future crop yields, and land-use change. However, there is a wide range in quality and spatial and temporal scale and resolution of climate and soil data underpinning these studies, as well as widely differing assumptions about cropping-system context and crop model calibration. Here we present an explicit rationale and methodology for selecting data sources for simulating crop yields and estimating yield gaps at specific locations that …

The Trehalose Pathway In Maize: Conservation And Gene Regulation In Response To The Diurnal Cycle And Extended Darkness, Clémence Henry, Samuel W. Bledsoe, Allison Siekman, Alec Kollman, Brian M. Waters, Regina Feil, Mark Stitt, L. Mark Lagrimini

Department of Agronomy and Horticulture: Faculty Publications

Energy resources in plants are managed in continuously changing environments, such as changes occurring during the day/night cycle. Shading is an environmental disruption that decreases photosynthesis, compromises energy status, and impacts on crop productivity. The trehalose pathway plays a central but not well-defined role in maintaining energy balance. Here, we characterized the maize trehalose pathway genes and deciphered the impacts of the diurnal cycle and disruption of the day/night cycle on trehalose pathway gene expression and sugar metabolism. The maize genome encodes 14 trehalose-6-phosphate synthase (TPS) genes, 11 trehalose-6-phosphate phosphatase (TPP) genes, and one trehalase gene. Transcript abundance of most …

Understanding The Factors Affecting Microbiological Quality Of Wheat Milled Products: From Wheat Fields To Milling Operations, Luis E. Sabillón Galeas

Department of Food Science and Technology: Dissertations, Theses, and Student Research

Although regarded as a low-risk commodity, wheat flour-based mixes have been implicated in several food safety incidents. The present thesis is a compilation of five scientific manuscripts on the effect of weather variation, milling steps and implementation of pre-milling interventions on the microbiological quality and safety of wheat and milled products. The first manuscript is a review of the microbiological quality and safety of wheat-based products. Despite the low water activity, wheat flour may harbor dormant but viable microorganisms, which could lead to safety concerns when flour is used to produce refrigerated dough products. The second manuscript illustrates the effect …

Guia Tecnica Para La Produccion Artesanal De Semilla De Variedades De Polinizacion Libre De Sorgo En America Central, René Clará Valencia

INTSORMIL Scientific Publications

La producción de semilla artesanal de sorgo es un complemento en la producción y uso de semilla certificada y tiene como objetivo el de atender a los agricultores que por diversas razones no acceden a la semilla certificada, pero son sujetos potenciales de producción y desarrollo del cultivo de sorgo. En términos generales son los agricultores de menos recursos, que representan la mayoría de productores de sorgo en América Central, los que se ven limitados a la utilización de las variedades mejoradas. Debemos de meditar sobre la utilización de las variedades mejoradas de polinización libre y probablemente el poco acceso …

Yield Gap Analysis With Local To Global Relevance—A Review, Martin K. Van Ittersum, Kenneth Cassman, Patricio Grassini, Joost Wolf, Pablo Tittonell, Zvi Hochman

Department of Agronomy and Horticulture: Faculty Publications

Yields of crops must increase substantially over the coming decades to keep pace with global food demand driven by population and income growth. Ultimately global food production capacity will be limited by the amount of land and water resources available and suitable for crop production, and by biophysical limits on crop growth. Quantifying food production capacity on every hectare of current farmland in a consistent and transparent manner is needed to inform decisions on policy, research, development and investment that aim to affect future crop yield and land use, and to inform on-ground action by local farmers through their knowledge …

Sorghum Flour Production Manual For Compatible Technology International (Cti) Burr Grinders, Kris Emillee Duville

INTSORMIL Scientific Publications

The importance of sorghum in human nutrition and food security

The grinders of Compatible Technology International (CTI) were brought to El Salvador in 2009, for a project of CENTA-INTSORMIL/USAID to promote the grinding of sorghum for human nutrition. In 2011, ten of these grinders had been installed in small bakers associations, individual bakers, or persons producing ethnic drinks based on roasted and ground cereals. These people had been trained in sorghum use for human nutrition at the food technology laboratory of CENTA. The grinders are being used in areas were the access to other foods is limited and were sorghum …

Utilizacion De Molinos Cti Para La Produccion Artesanal De Harina De Sorgo, Vilma Ruth Calderón De Zacatares, Lily Marisol López, Kris Emillee Duville, Carla Elizabeth Bermúdez

INTSORMIL Scientific Publications

El aprovechamiento del sorgo para la alimentación humana permite agregar valor al cultivo y aumentar su rentabilidad, especialmente para pequeños y medianos productores, contribuyendo a la seguridad alimentaria y nutricional en El Salvador. El CENTA esta promoviendo el cultivo del sorgo como una alternativa para la produccion de alimentos en las areas rurales y urbanas. Desde 2010 cuando el trigo bajo de precio nuevamente, dejo de ser una alternativa para la sustitucion por sorgo en ciertos tipos de alimentos, pero se esta utilizando en mercados mas estables, como personas alergicas al gluten, personas diabéticas y para corregir deficiencias nutricionales como …

“Manual Para La Molienda De Sorgo O Maicillo, Usando Molinos Cti De Discos”, Kimberly Christiansen

INTSORMIL Scientific Publications

IMPORTANCIA EN LA NUTRICIÓN Y SEGURIDAD ALIMENTARIA

Los molinos CTI fueron introducidos por la ONG Tecnologia compatible internacional en el ano 2009, con la ayuda del proyecto CENTA‐INTSORMIL/USAID, para facilitar los procesos de molienda de granos en El Salvador, en especial para ser utilizados en la molienda de sorgo o maicillo. Existen ya un aproximado de 12 molinos en el país, los cuales están siendo utilizados por asociaciones de productores de sorgo, cooperativas, asociaciones de mujeres rurales, pequeñas empresas de alimentos y personas particulares, para la elaboración de diversos productos alimenticios, los cuales son usados para la alimentación familiar o …

Agriculture And Food In Crisis: Conflict, Resistance, And Renewal [Book Review], Charles A. Francis

Department of Agronomy and Horticulture: Faculty Publications

Edited by Fred Magdoff and Brian Tokar. 2010. Monthly Review Press, New York, New York, United States. 348 p. Paperback, cloth US$ 75.00, paper US$ 18.95, ISBN-13 978-1-58367-226-6.

That doubling of food production over the next four decades will be needed to adequately nourish our human population is not news, but the incredible steps essential to achieve that goal and their political and social implications are less well reported. In this series of 16 essays edited by Fred Magdoff and Brian Tokar, several thoughtful specialists in global food issues explore the historical, biological, economic, energy, political and social dimensions of …

Improvement Of Farmers' Incomes Through Improved Processing Of Sorghum And Millets In West Africa, Ababacar Sadikh N'Doye, Bruce Hamaker, Roy L. Whistler

INTSORMIL Presentations

Purdue University and ITA are very active in the USAID INTSORMIL CRSP Program for promoting the production and the consumption of millet and sorghum in West Africa. Countries involved in this program are : Burkina Faso, Mali, Niger, Nigeria and Sénégal.

Market-oriented objectives of the INTSORMIL Program on millet and sorghum in West Africa:

Objective 1: Increase the supply of high quality grain through the introduction of new production technologies at the farmer level in West Africa.

Objective 2: Contribute to the development of the processing sector through technologies improvement , more effective technology transfer to processors, and better links …

Recetario De Productos Elaborados A Base De Sorgo (Sorghum Bicolor, L. Moench), Kimberly Christiansen

INTSORMIL Scientific Publications

El Centro Nacional de Tecnologia Agropecuaria y Forestal (CENTA), “Enrique Álvarez Córdova”, a través del Laboratorio de Tecnología de Alimentos, ha venido desarrollando por más de una década, investigaciones relacionadas al uso de sorgo en la alimentación humana, con la colaboración del instituto para la investigación en Sorgo y Mijo de los Estados Unidos de América (INTSORMIL). A partir del año 2000, las investigaciones en el cultivo del sorgo han tomado más auge, por lo que el Programa de Granos Básicos, como apoyo al trabajo que realiza el Laboratorio de Tecnología de Alimentos, ha desarrollado una serie de variedades mejoradas, …

Manejo Agronómico En La Producción De Sorgo, Máximo Antonio Hernández Valle, Carlos Borja

INTSORMIL Presentations

Gives an overview of some issues involved in cultivating sorghum in Central America.

The Role Of Sorghum In Food Security In Central America, Lloyd W. Rooney

INTSORMIL Presentations

Discusses the qualities of sorghum that make it suitable for human consumption, with a focus on its use in Central America.

Sorghum Clear Beer Value Chain, Bernadette C. Chimai

INTSORMIL Presentations

The markets and industrial utilization of agricultural commodities have undergone considerable change in the last few decades.

In Zambia, sorghum was considered a traditional crop with limited industrial uses.

Research and transformations in consumer tastes and preferences have led to the development of new uses for sorghum.

Potential markets for industrial utilization of sorghum have been identified as food processing, beer brewing, feed concentrates and energy production.

One of the success stories in industrial utilization of sorghum has been Eagle, a sorghum based clear beer produced by Zambian breweries.

The study reported in this paper aims to examine the main …

The Importance Of Sorghum Grain Colour And Hardness, And Their Causes And Measurement, Doreen Mwiita Hikeezi

INTSORMIL Presentations

Discusses sorghum grain color and kernel hardness, assessment methods, and the importance of each to the overall quality of the grain.

Industrial Sorghum Malting: Technologies That Can Be Used And Practical Considerations, Gyebi Duodu

INTSORMIL Presentations

What is malting?

– Germination of grain in moist air under controlled conditions

Objectives for opaque beer brewing

–Mobilization of endogenous enzymes of the grain

–Use of the endogenous enzymes to modify grain constituents for ready solubilisation

–Use of the endogenous enzymes to solubilise starchy adjunct during mashing

Market Development In Support Of Sorghum And Millet Farmers In Tanzania And Zambia, J. Mark Erbaugh, Emmanuel R. Mbiha, Fredy T.M. Kilima, Precious Hamukwala, Gelson Tembo, Donald W. Larson

INTSORMIL Presentations

Problem: Sorghum and millet productivity, production and consumption have been stagnant or declining for 20 years.

Challenge: How to increase the productivity and incomes of sorghum and millet farmers to improve food security and accelerate economic growth.

Solution: Better technology and linking producers to markets are important parts of the solution to the problem.

Objectives

Examine the effects of new production and marketing technology on sorghum and millet producers’ income and productivity in Tanzania and Zambia.

Identify better technologies, enhance market linkages between producers and buyers, improve quality and diversify utilization to ensure food security and increase farm income.

Conclusions: …

Sorghum Malting: Introduction, Objectives, And Scientific Principles, John R.N. Taylor

INTSORMIL Presentations

What is malting? It is limited germination of cereal grains in moist air under controlled conditions.

Why malt sorghum products?

Sorghum malt for home brewing

For brewing opaque beer, lager and stout

For “brewing” malt (malta) type non-alcoholic beverages

To produce malt extract for hot malted beverages,cereal and confectionery flavoring and coloring

For breakfast cereals

For “power flour”–enzyme active flour to “thin” infant porridges

Also explains the science of malting, and the importance of using high-quality grain.

Eagle Lager: A Sorghum Success Story On Many Levels, Ian Mackintosh

INTSORMIL Presentations

In 1999 in Uganda we were faced with a static but highly competitive market.

Needed to grow our market and to do this we needed to make beer cheaper

It was felt that a suitable local ingredient would reduce the cost of manufacture and stimulate local agriculture and the economy as well as provide opportunities for growth and profit for the company.

An extensive base line study of the Ugandan agricultural sector was undertaken to determine what was “out there.”

It was clear that there was enormous potential but little else.

Sorghum seemed the logical starting point because there was …

Improvements In Sorghum Milling Technologies, Martin M. Kebakile

INTSORMIL Presentations

Discusses in some detail various sorghum milling techniques.