Agricultural Science Commons^™

Effects Of Nitrogen And Phosphorus Fertilizer And Topsoil Amendment On Native Plant Cover In Roadside Revegetation Projects, Heidi L. Hillhouse, Walter H. Schacht, Jonathan M. Soper, Carol E. Wienhold

Department of Agronomy and Horticulture: Faculty Publications

Establishing vegetation on roadsides following construction can be challenging, especially for relatively slow growing native species. Topsoil is generally removed during construction, and the surface soil following construction (“cut-slope soils”) is often compacted and low in nutrients, providing poor growing conditions for vegetation. Nebraska Department of Transportation (NDOT) protocols have historically called for nitrogen (N) and phosphorus (P) fertilization when planting roadside vegetation following construction, but these recommendations were developed for cool-season grass plantings and most current plantings use slower-establishing, native warmseason grasses that may benefit less than expected from current planting protocols. We evaluated the effects of nitrogen and …

Profitability Of Diammonium Phosphate Use In Bush And Climbing Bean-Maize Rotations In Smallholder Farms Of Central Burundi, Marie Chantal Niyuhire, Pieter Pypers, Bernard Vanlauwe, Generose Nziguheba, Dries Roobroeck, Roel Merckx

All Peer-Reviewed Publications

Soil fertility decline is a major constraint to bean (Phaseolus vulgaris L.) and maize (Zea mays) production in the Central Highlands of Burundi. Nutrient sources, specifically fertilizers, are paramount to increasing the production in the regions. Hence, improving fertilizer use efficiency is considered as a key factor towards sustainable intensification. The use of grain legumes with low harvest indices, such as climbing beans, are assumed to improve soil fertility and fertilizer use efficiency. This study compares the rotational effects of bush and climbing bean varieties on maize and evaluates the profitability of diammonium phosphate (DAP, 18–46-0) fertilizer in the bean-maize …

The Gmo/Ge Debate, Joanna K. Sax

Texas A&M Law Review

We live longer and healthier lives because advances in science create easier and better ways to sustain and survive. Society has an intricate relationship with biotechnology. Vaccines save lives. Fluoridated water decreases dental issues. Antibiotics treat bacterial infections. Nuclear power is a form of clean energy. With any emerging technology, the benefits do not exist in a vacuum, thus, negative consequences result as well. Our widespread uses of antibiotics are creating antibiotic-resistant strains of bacteria. Our research into nuclear energy also facilitated the creation of nuclear bombs. Perhaps it is human nature to use scientific advances for good and for …

Recognizing Challenges And Opportunities In The Quest To End Hunger, Jennifer Williams Zwagerman

Texas A&M Law Review

As an attorney and professor that does not focus on intellectual property law, I was a bit apprehensive about providing a keynote address for a Symposium focusing on “Agriculture, Intellectual Property, and Feeding the World in the 21st Century.” As I thought about this topic, knowing that there were other speakers who would focus more on the IP issues and technical aspects of various topics, I kept coming back to the importance of technology as we worktowards the goal of feeding the world, and the many ways in which innovation plays a role in meeting that goal. It also brought …

Seeds From Fresh Conventional Tomatoes Germinate Faster Than Dried Or Organic Seeds, Christopher G. Brown, Kautz Evan, Cameron Kilpatrick, Mary Vu, Mallory Weaver

Georgia Journal of Science

Conventionally-grown and organically-grown tomato seeds sourced from both fresh tomatoes and store-bought packages were germinated for seven days to evaluate the effect of seed source on germination rates. Seeds from fresh Roma tomatoes were prepared by allowing them to ferment in their own pulp for 24 hours, while commercially packaged dry seeds did not require any preparation. Once prepared, the seeds were spaced evenly on wet paper towels and stored in resealable plastic bags in groups of 10 for a total sample size of 100 seeds in each of four treatments. The number of germinated seeds and the length of …

Economies Of Scale In Integrated Pest Management In Vegetable And Fruit Production, Franklin Quarcoo, Conrad Bonsi, David Nii O. Tackie, Walter A. Hill, Gertrude Wall, George Hunter

Professional Agricultural Workers Journal

Abstract

Pest management is achieved directly using a variety of tools, including pesticides, and indirectly through a number of agronomic/cultural practices such as irrigation and fertilizer application; collectively these practices function to positively effect general plant health. Healthier plants are more resistant to or tolerant of pests. This study explores the scale differences that impact the pest management significance and suitability of certain agronomic practices. Scale differences were discussed using literature-based information, direct field observations, and anecdotal information on the relative advantages of drip and sprinkler irrigation systems; organic and conventional cultivation of crops; crop rotation versus mono-cropping systems; precision …

Summaries Of Arkansas Cotton Research 2016, Fred Bourland

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Organic Farming Provides Improved Management Of Plant Parasitic Nematodes In Maize And Bean Cropping Systems, Janet G. Atandi, Solveig Haukeland, George M. Kariuki, Danny L. Coyne, Edward N. Karanja, Martha W. Musyoka, Komi K.M. Fiaboe, David Bautze, Noah Adamtey

All Peer-Reviewed Publications

Intensification of agriculture, combined with poor agronomic practices have increased the incidence of plant parasitic nematodes (PPN) and other soil pathogens in East Africa, which consequently affects crop productivity in small holder farms. The objective of the study was to assess the effectiveness of farming systems in management of PPN and to recommend the best practice to farmers. Therefore, two field trials were established, one in farmer fields and one on-station, using maize (Zea mays L.), intercropped with beans (Phaseolus vulgaris L.) and in rotation with beans as a sole crop. Organic farming (that received compost, Tithonia diversifolia and neem …

An Assessment Of The Magnitudes And Factors Associated With Postharvest Losses In Off-Farm Grain Stores In Kenya, Joseph K. Mwangi, Christopher M. Mutungi, Soul Kifouly G. Midingoyi, Abdul K. Faraj, Hippolyte D. Affognon

All Peer-Reviewed Publications

Off-farm grain storage is an important postharvest undertaking by government, traders and processors in Kenya. A survey was conducted in 2014/2015 to assess the kinds and magnitudes of perceived losses experienced in off-farm stores, and the factors associated with them. Store supervisors or key personnel charged with grain storage in 39 public and 74 private stores, spread across the six maize growing agro-ecological zones, were interviewed using a structured questionnaire. Total perceived losses averaged 17.6± 2.3%, and were attributed to insects (7.2± 1.0%), molds (5.7± 2.1%), moisture loss (3.4± 0.5%), rodents (2.0± 0.5%), spillage (0.50 ± 0.0%) and birds (0.10± …

Mapping Leaf Nitrogen And Carbon Concentrations Of Intact And Fragmented Indigenous Forest Ecosystems Using Empirical Modeling Techniques And Worldview-2 Data, Galal Omer, Onisimo Mutanga, Elfatih M. Abdel-Rahman, Kabir Peerbhay, Elhadi Adam

All Peer-Reviewed Publications

Forest nitrogen (N) and carbon (C) are among the most important biochemical components of tree organic matter, and the estimation of their concentrations can help to monitor the nutrient uptake processes and health of forest trees. Traditionally, these tree biochemical components are estimated using costly, labour intensive, time-consuming and subjective analytical protocols. The use of very high spatial resolution multispectral data and advanced machine learning regression algorithms such as support vector machines (SVM) and artificial neural networks (ANN) provide an opportunity to accurately estimate foliar N and C concentrations over intact and fragmented forest ecosystems. In the present study, the …

Quality Of Charcoal Produced Using Micro Gasification And How The New Cook Stove Works In Rural Kenya, Mary Njenga, Yahia Mahmoud, Ruth Mendum, Miyuki Iiyama, Ramni Jamnadass, Kristina Roing De Nowina, Cecilia Sundberg

All Peer-Reviewed Publications

Wood based energy is the main source of cooking and heating fuel in Sub-Saharan Africa. Its use rises as the population increases. Inefficient cook stoves result in fuel wastage and health issues associated with smoke in the kitchen. As users are poor women, they tend not to be consulted on cook stove development, hence the need for participatory development of efficient woodfuel cooking systems. This paper presents the findings of a study carried out in Embu, Kenya to assess energy use efficiency and concentrations of carbon monoxide and fine particulate matter from charcoal produced using gasifier cook stoves, compared to …

Control Of Glyphosate-Resistant Common Ragweed (Ambrosia Artemisiifolia L.) In Glufosinate-Resistant Soybean [Glycine Max (L.) Merr], Ethann R. Barnes, Stevan Z. Knezevic, Peter H. Sikkema, John L. Lindquist, Amit J. Jhala

Department of Agronomy and Horticulture: Faculty Publications

Common ragweed emerges early in the season in Nebraska, USA and is competitive with soybean; therefore, preplant herbicides are important for effective control. Glyphosate has been used as a preplant control option; however, confirmation of glyphosate-resistant (GR) common ragweed in Nebraska necessitates evaluating other herbicide options. The objectives of this study were to (1) evaluate the efficacy of preplant (PP) herbicides followed by (fb) glufosinate alone or in tank-mixture with imazethapyr, acetochlor, or S-metolachlor applied post-emergence (POST) for control of GR common ragweed in glufosinate-resistant soybean; (2) their effect on common ragweed density, biomass, and soybean yield; and (3) the …

A Comparison Of Soils And Their Associated Microbial Communities As Affected By Sugarcane Cultivation, Adam Francis Bigott

LSU Master's Theses

In Louisiana, sugarcane has been grown in the same soils for over 200 years. A phenomenon wherein soils with a long-term sugarcane cropping history produce decreased yields compared to adjacent land without a recent history of sugarcane cultivation has been documented in multiple sugarcane growing regions. Research in both Louisiana and internationally has shown positive plant growth responses when soils with a long-term cultivation history are sterilized or treated with selective biocides, suggesting there is a biological component to the underlying soil health issue. In this study, soil microbial ecology was compared for paired sites with short and long-term sugarcane …

Evaluating Mine Soil Prepared By Scraper Pans For Herbaceous Plants And Pine Seedlings At An East Texas Lignite Surface Mine, Hannah Z. Angel

Electronic Theses and Dissertations

Since 1974, Luminant Mining Company, LLC (Luminant) has planted over 38.7 million trees on its reclaimed lignite surface mine operations in Texas. For decades, the use of improved reclamation techniques on Luminant’s mined lands have resulted in over 31,160 ha reclaimed to forests, wildlife habitat, and pastures with productivity levels similar to those found on unmined lands. The development of new reclamation methodologies offers opportunities to further improve productivity of planted trees at Luminant’s Martin Lake Oak Hill Mine in east Texas. The conventional haulback or ‘truck shovel’ reclamation method uses haul trucks for the selective transport and placement of …

Pinching And Spacing Effects On Cut Sunflower (Helianthus Annuus) Production In East Texas, Rebecca B. Burnett

Electronic Theses and Dissertations

Three experiments evaluated pinching and spacing on Helianthus annuus in East Texas to determine their effects on growth and development. Experiment 1 was designed to determine the effects of pinching nodes 1, 2, 3, or 4 on ‘Pro Cut Gold’ sunflowers. Results from experiment 1 showed non-pinched plants produced marketable stem lengths and flower sizes, while pinched plants’ stem length, stem diameter, flower diameter, and disk diameter decreased compared to the non-pinched plants. The objective for experiment 2 was to evaluate pinching and spacing treatments on ‘Pro Cut Gold’ sunflowers. All spacings for non-pinched plants in experiment 2 produced marketable …

Pengaruh Pemangkasan Terhadap Pertumbuhan: Percabangan Dan Pembesaran Bonggol Tiga Kultivar Kamboja Jepang (Adenium Arabicum), Yayat Rochayat Suradinata, Adinda Cikal Amalia, Anne Nuraini

Jurnal Kultivasi

Ornamental plant of Adenium arabicum has a selling value and a high aesthetic value. The beauty of the exotic stump and branching lots are characteristic that differentiates it from other species of Adenium. However, to get a lot of branching and stump enlargement require a long time, so that should an effort to speed up the desired form A. aracium, that is by pruning. This research aimed to determine the effect of pruning on growth, that is branching and stump enlargement three cultivars of A. arabicum. Experiment as done on April until June 2016 at Ciparanje Experimental Station, Faculty of …

Pengaruh Inokulasi Trichoderma Sp Dan Varietas Bawang Merah Terhadap Penyakit Moler Dan Hasil Tanaman Bawang Merah (Allium Ascalonicum L), Deden, Uum Umiyati

Jurnal Kultivasi

Bawang merah (Allium ascalonicum L.) merupakan salah satu komoditas hortikultura unggulan yang sejak lama telah diusahakan oleh petani secara intensif, khusunya petani di wilayah Cirebon. Salah satu penyakit yang sering dijumpai pada tanaman bawang merah adalah penyakit moler. Saat ini pengendalian penyakit Moler masih bertumpu pada penggunaan kimia (Fungisida). Salah satu agen hayati yang sudah terbukti berperan ampuh sebagai pengendali hayati yaitu Trichoderma sp. Tujuan dari penelitian ini adalah (1) Untuk mengetahui pengaruh dan interaksi antara Trichoderma sp dan varietas bawang merah terhadap pengendalian penyakit moler dan hasil tanaman bawang merah (Allium ascalonicum L), (2) Untuk mengetahui jenis dan dosis …

Impact Of Seed Protein Alleles From Three Soybean Sources On Seed Composition And Agronomic Traits, Lillian F. Brzostowski, Timothy I. Pruski, James Specht, Brian W. Diers

Department of Agronomy and Horticulture: Faculty Publications

Evaluation of seed protein alleles in soybean populations showed that an increase in protein concentration is generally associated with a decrease in oil concentration and yield.

Soybean [Glycine max (L.) Merrill] meal is one of the most important plant-based protein sources in the world. Developing cultivars high in seed protein concentration and seed yield is a difficult task because the traits have an inverse relationship. Over two decades ago, a protein quantitative trait loci (QTL) was mapped on chromosome (chr) 20, and this QTL has been mapped to the same position in several studies and given the confirmed QTL …

Pengaruh Inokulasi Mikoriza Vesikular Arbuskula (Mva) Dan Pupuk Pelengkap Cair Terhadap Pertumbuhan, Komponen Hasil Dan Hasil Tanaman Kedelai Pada Tanah Inceptisols Jatinangor, Aep Wawan Irwan, Agus Wahyudin

Jurnal Kultivasi

Percobaan ini bertujuan untuk mengetahui pengaruh interaksi antara pupuk organik cair dan MVA sehingga diketahui dinamika pengaruh faktor pada taraf pupuk pelengkap cair yang berbeda dari faktor MVA yang diberikan terhadap pertumbuhan dan hasil tanaman kedelai kultivar Kaba pada tanah inceptisols di Jatinangor. Percobaan dilaksanakan di Kebun Percobaan Fakultas Pertanian, Universitas Padjadjaran, Jatinangor, dari bulan November 2014 sampai April 2015.Percobaan ini menggunakan metode dengan Rancangan Acak Kelompok (RAK) pola faktorial yang terdiri dari dua faktor, yaitu faktor pertama adalah dosis Mikoriza Vesikular Arbuskular (MVA), yaitu 5 g/polybag, 10 g/polybag dan 15 g/polybag dan faktor kedua yaitu dosis pupuk pelengkap cair …

Respons Tanaman Kedelai (Glycine Max) Varietas Wilis Akibat Pemberian Berbagai Dosis Pupuk N, P, K, Dan Pupuk Guano Pada Tanah Inceptisol Jatinangor, Agus Wahyudin, Fiky Yulianto Wicaksono, Aep Wawan Irwan, Ruminta, Rizka Fitriani

Jurnal Kultivasi

Penelitian ini bertujuan untuk melihat apakah pemberian Pupuk Organik Padat Guano dapat memberikan hasil yang sama dengan pemberian Pupuk N,P,K. Percobaan dilakukan di Rumah Kaca Fakultas Pertanian Universitas Padjadjaran, Jatinangor dengan ketinggian 754m dpl dan menggunakan tanah inceptisol dengan pH 6,18.Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok, terdiri dari 8 perlakuan kombinasi dosis pupuk, yang terdiri dari 100% N,P,K, 100% Pupuk Guano, 75% N,P,K + 100% Pupuk Guano, 50% N,P,K + 100% Pupuk Guano, 75% N,P,K + 75% Pupuk Guano, 50% N,P,K + 75% Pupuk Guano, 75% N,P,K + 50% Pupuk Guano serta 50% N,P,K + 50% Pupuk Guano. …

Respons Pertumbuhan Dan Hasil Benih Kentang G0 Di Dataran Medium Terhadap Waktu Dan Cara Aplikasi Paklobutrazol, Nuzula Suci Azima, Anne Nuraini, Sumadi, Jajang Sauman Hamdani

Jurnal Kultivasi

Aplikasi paklobutrazol pada penanaman kentang di dataran medium dapat mengurangi sintesis giberelin yang menyebabkan penurunan hasil kentang. Efektifitas paklobutrazol tidak hanya dipengaruhi oleh konsentrasi, tetapi juga waktu dan cara aplikasinya. Tujuan penelitian ini adalah untuk memperoleh waktu dan cara aplikasi paklobutrazol yang memberikan pengaruh paling baik dalam meningkatkan hasil benih kentang G0 di dataran medium. Rancangan penelitian menggunakan Rancangan Acak Kelompok (RAK) Faktorial dengan 3 ulangan. Perlakuannya terdiri dari waktu aplikasi paklobutrazol yaitu 28, 35 dan 42 HST (Hari Setelah Tanam) dan cara aplikasi paklobutrazol yaitu disemprot ke daun, disiram ke media tanam dan kombinasi antara penyemprotan ke daun dan …

Pengaruh Dosis Silika Terhadap Karakter Fisiologı Dan Hasil Tanaman Padi (Oryza Sativa L.) Kultivar Lokal Poso (Kultıvar 36-Super Dan Tagolu), Wan Priando Tampoma, Tati Nurmala, Meddy Rachmadi

Jurnal Kultivasi

Padi (Oryza sativa L.) merupakan salah satu jenis tanaman yang memegang peran penting di Indonesia dalam memenuhi kebutuhan pangan. Tanaman padi kultivar lokal merupakan salah satu jenis padi yang memiliki poduktivitas rendah. Pemberian silika pada pertanaman padi dapat membantu mengoptimalkan pertumbuhan dan hasil tanaman padi. Tujuan penelitian ini adalah untuk mengetahui pengaruh silika terhadap karakter agronomi kultivar lokal Poso. Rancangan percobaan yang digunakan dalam penelitian ini adalah menggunakan Rancangan Petak Terbagi (RPT). Faktor pertama sebagai petak utama terdiri dua taraf perlakuan yaitu K1 (Kultivar 36-Super) dan K2 (Kultivar Tagolu). Sedangkan faktor ke dua sebagai anak petak terdiri atas 4 taraf …

A Public–Industry Partnership For Enhancing Corn Nitrogen Research And Datasets: Project Description, Methodology, And Outcomes, Newell R. Kitchen, John F. Shanahan, Curtis J. Ransom, Christopher J. Bandura, Gregory M. Bean, James J. Camberato, Paul R. Carter, Jason D. Clark, Richard B. Ferguson, Fabian G. Fernandez, David W. Franzen, Carrie A.M. Laboski, Emerson D. Nafziger, Zhisheng Qing, John E. Sawyer, Matt Shafer

Agronomy, Horticulture and Plant Science Faculty Publications

Due to economic and environmental consequences of N lost from fertilizer applications in corn (Zea mays L.), considerable public and industry attention has been devoted to the development of N decision tools. Needed are research and databases and associated metadata, at numerous locations and years to represent a wide geographic range of soil and weather scenarios, for evaluating tool performance. The goals of this research were to conduct standardized corn N rate response field studies to evaluate the performance of multiple public-domain N decision tools across diverse soils and environmental conditions, develop and publish new agronomic science for improved …

Application Of X-Ray Imaging As A Technique For Fissure Detection In Rough Rice Kernels, Zephania R. Odek

Graduate Theses and Dissertations

Fissured rice kernels break during milling, leading to head rice yield (HRY) reductions. Conventional fissure detection instruments cannot be used to observe fissures in rough rice kernels, the form in which rice in normally dried and stored. X-rays can penetrate hulls allowing visualization of the internal structure of a rough rice kernel. This study evaluated the capability of X-ray imaging to adequately detect fissures in rough rice and established a correlation between HRY and the fissured kernel percentage (FKP) in a rough rice sample. Fifteen long-grain rice cultivars, harvested in Arkansas in 2015 and 2016 were dried using heated air …

B. R. Wells Arkansas Rice Research Studies 2016, R. J. Norman, K.A. K. Moldenhauer

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Comparison Of Understory Chemical And Mechanical Treatments To Promote Regeneration Of Desirable Forestland Species, Rebecca Rachael Tyler

Graduate Theses/Dissertations

Invasive woody plants and trees can have a negative impact on desired tree regeneration in the understory of forest stands, and forage density in grassland sites. An assessment of chemical and mechanical treatments on woody plants in the understory of forestland and in grassland is needed. Two experiments were set up in two forest stands and in two grassland/forest edge sites, with two treatment times during the growing season in the first year of the study. On the forestland sites, chemical and mechanical treatments were applied on undesired woody plants to see if they effect the regeneration of desired tree …

Arkansas Wheat Cultivar Performance Tests 2016-2017, R. E. Mason, R. G. Miller, D. E. Moon, J. P. Kelley

Arkansas Agricultural Experiment Station Research Series

Wheat cultivar performance tests are conducted each year in Arkansas by the University of Arkansas System Division of Agriculture’s Arkansas Agricultural Experiment Station, Department of Crop, Soil and Environmental Sciences. The tests provide information to companies developing cultivars and marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating cultivar recommendations for small-grain producers.

A Laboratory-Scale Study On The Production Of High-Value Products From Broiler Litter Involving Solid-State Anaerobic Digestion And Mushroom Cultivation, Joe Barrett Carter Iii

Graduate Theses and Dissertations

There is a need to investigate alternate uses and treatments of broiler litter that lessen environmental impacts and decrease costs associated with its disposal. Anaerobic digestion is a biological process in which organic material is converted to a renewable fuel source. However, the substrate for anaerobic digestion often requires some form or pretreatment. Certain types of fungus have been investigated as a pretreatment for anaerobic digestion, one of which is Pleurotis ostreatus or the oyster mushroom, which also produces an edible fruiting body. Thus, this study was performed to investigate the use of broiler litter for oyster mushroom cultivation and …

Drought-Tolerant Desmodium Species Effectively Suppress Parasitic Striga Weed And Improve Cereal Grain Yields In Western Kenya, Charles A.O. Midega, Charles J. Wasonga, Antony M. Hooper, John A. Pickett, Zeyaur R. Khan

All Peer-Reviewed Publications

The parasitic weed Striga hermonthica Benth. (Orobanchaceae), commonly known as striga, is an increasingly important constraint to cereal production in sub-Saharan Africa (SSA), often resulting in total yield losses in maize (Zea mays L.) and substantial losses in sorghum (Sorghum bicolor (L.) Moench). This is further aggravated by soil degradation and drought conditions that are gradually becoming widespread in SSA. Forage legumes in the genus Desmodium (Fabaceae), mainly D. uncinatum and D. intortum, effectively control striga and improve crop productivity in SSA. However, negative effects of climate change such as drought stress is affecting the functioning of these systems. There …

Application Of Secondary Nutrients And Micronutrients Increases Crop Yields In Sub-Saharan Africa, Job Kihara, Gudeta Weldesemayat Sileshi, Generose Nziguheba, Michael Kinyua, Shamie Zingore, Rolf Sommer

All Peer-Reviewed Publications

Secondary and micronutrients are important in enhancing crop productivity; yet, they are hardly studied in sub-Sahara Africa. In this region, the main focus has been on macronutrients but there is emerging though scattered evidence of crop productivity limitations by the secondary and micronutrients. Elsewhere, widespread deficiencies of these nutrients are associated with stagnation of yields. Here, we undertake a meta-analysis using 40 articles reporting crop response to secondary and micronutrients to (1) determine the productivity increase of crops and nutrient use efficiency associated with these nutrients, and (2) provide synthesis of responses to secondary nutrients and micronutrients in sub-Sahara Africa. …