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Agronomy and Crop Sciences

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Characterization, Incidence, And Epidemiology Of Two Novel Strawberry Rhabdoviruses, Ava Wait May 2021

Characterization, Incidence, And Epidemiology Of Two Novel Strawberry Rhabdoviruses, Ava Wait

Graduate Theses and Dissertations

Strawberry is the most important berry crop, grown in most temperate regions around the world. In the early 2000s and in 2012-2013, viral disease devastated strawberry production in California and Florida respectively; causing multimillion dollar losses. This occurred because viruses were moving in the field undetected. The modern strawberry (Fragaria x ananassa Duch.) is tolerant to single and double infections; yet when several viruses infect plants, symptoms as severe as plant death can occur. To prevent future epidemics, the use of virus-tested planting materials is essential. In 2019, rhabdovirus-like sequences were detected in strawberry using a combination of high-throughput sequencing …


Resistance Screening And Association Mapping For Resistance To The Downy Mildew Pathogen Of Spinach, Dotun Olaoye May 2021

Resistance Screening And Association Mapping For Resistance To The Downy Mildew Pathogen Of Spinach, Dotun Olaoye

Graduate Theses and Dissertations

Spinach is an important cool leafy vegetable cultivated around the world, with large scale production in California and Arizona in the U.S. Spinach is a highly nutritious vegetable beneficial in the human diet. Spinach is affected by a number of biotic stressors. Downy mildew, caused by the oomycete pathogen Peronospora effusa, is a major threat to spinach as it affects the leaf quality and impacts the economic value of spinach. Several efforts have led to the development of resistant genotypes/cultivars to this pathogen. However, few studies have examined the genetics of resistance to the downy mildew pathogen in detail. This …


Does Integrating Crops With Livestock Production Impact Soil Properties And Crop Production?, Lindsey Anderson May 2021

Does Integrating Crops With Livestock Production Impact Soil Properties And Crop Production?, Lindsey Anderson

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

Re-integrating crop and livestock production through cover crop (CC) and corn residue grazing could efficiently utilize resources and ensure profitability while improving environmental quality, but how this integration affects soils and crops is not well understood. We conducted two studies to address this. In the first study, we evaluated the impact of cattle (1.3-3.7 head ha-1) grazing an oat (Avena sativa L.) CC on soil and crop yields in two adjacent irrigated no-till corn (Zea mays L.)-soybean (Glycine max L.) fields on silt loam soils in eastern Nebraska. Field I was grazed twice, while Field …


Starter Nitrogen Source And Preflood Nitrogen Rate Effects On Rice Grown On Clay Soils, Linda Rachelle Martin May 2021

Starter Nitrogen Source And Preflood Nitrogen Rate Effects On Rice Grown On Clay Soils, Linda Rachelle Martin

Graduate Theses and Dissertations

Seedling rice (Oryza sativa L.) grown on clayey-textured soils generally develops slowly as compared to loamy-textured soils. Our research examined the effects of starter-N source and preflood-N rates on canopy closure, total aboveground N uptake, and grain yield of rice grown on clayey-textured soils. Eleven field trials were established in Arkansas and Mississippi including five trials with a hybrid cultivar and six trials using a pure-line cultivar. Starter-N sources included no starter-N (NONE), ammonium sulfate (AMS), diammonium phosphate (DAP), and urea (UREA) applied at 24 kg N ha-1 at the rice 2-leaf stage and five preflood-N rates ranging from 0-224 …


Production, Evaluation, And Selection Of Elite Quality Protein Popcorn (Qpp) Hybrids, Leandra Marshall Parsons May 2021

Production, Evaluation, And Selection Of Elite Quality Protein Popcorn (Qpp) Hybrids, Leandra Marshall Parsons

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

In 2017, twelve Quality Protein Popcorn (QPP) inbred lines were developed and selected as premier dent by popcorn crosses fit for hybridization and testing. These QPP inbred lines were derived from specific Quality Protein dent Maize (QPM) by ConAgra Brands® popcorn line crosses to produce high lysine, vitreous popcorn lines capable of near-equal popping characteristics compared to the original popcorn parents. The QPP hybridization project commenced in the summer of 2018 utilizing these 12 inbred QPP lines and crossing them in a full diallel. Since then, the production of QPP hybrids has employed a diverse set of selection factors evaluating …


Seeding Rate, Herbicide, And Irrigation Effects On Spring-Seeded Oat-Alfalfa Companion Crops, Carson D. Roberts May 2021

Seeding Rate, Herbicide, And Irrigation Effects On Spring-Seeded Oat-Alfalfa Companion Crops, Carson D. Roberts

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Small grain companion crop seeding rate recommendations for alfalfa (Medicago sativa L.) establishment are dated and inconsistent, and how a small grain companion crop seeding rates should be adjusted at different moisture levels is unknown. A study was conducted to provide clarity about oat (Avena sativa L.) companion crop seeding rates that maximize weed suppression and forage yield and minimize the effect on alfalfa stand establishment. This experiment considered oat companion crop seeding rates at various irrigation levels. Companion crop treatments consisted of oats sown at 89, 45, 22, 10, and 0 (with and without herbicide) kg ha …


Quality Determinates Of Rice Price In Open Bag Markets In Sub-Saharan Africa, Bailey Peterson-Wilhelm May 2021

Quality Determinates Of Rice Price In Open Bag Markets In Sub-Saharan Africa, Bailey Peterson-Wilhelm

Graduate Theses and Dissertations

Weaknesses in the grades and standards system in low-income countries across Sub-Saharan Africa undermine the transparency of agricultural markets. In the Democratic Republic of the Congo (DRC), Ghana and Mozambique rice is predominately sold in open bags and if rice price does not reflect its quality, then inefficiencies may lead to consumer welfare losses. Importantly, it is possible that impoverished communities are priced out of the market due to inflated and inefficient prices. The objective of this study is to examine determinates of rice price by estimating the impact of selected rice quality attributes on rice prices in DRC, Ghana …


Sample Preparation Affects Non Structural Carbohydrates In Alfalfa, Gaëtan F. Tremblay, Annick Bertrand, Yves Castonguay, Gilles Bélanger, Sophie Pelletier, Réal Michaud Apr 2021

Sample Preparation Affects Non Structural Carbohydrates In Alfalfa, Gaëtan F. Tremblay, Annick Bertrand, Yves Castonguay, Gilles Bélanger, Sophie Pelletier, Réal Michaud

IGC Proceedings (1977-2023)

No abstract provided.


Nitrogen Intake And Utilisation Pattern In The Digestive Tract Of Sheep Grazing Four Subtropical Foggages, Willem A. Van Niekerk, Abubeker Hassen Apr 2021

Nitrogen Intake And Utilisation Pattern In The Digestive Tract Of Sheep Grazing Four Subtropical Foggages, Willem A. Van Niekerk, Abubeker Hassen

IGC Proceedings (1977-2023)

No abstract provided.


Effect Of Genotype And Cutting System On Agronomic And Feed Quality Characteristics Of Perennial Ryegrass (Lolium Perenne L.) Grown In Three Sites In Northern Germany, H. Salama, M. Lösche, Antje Herrmann, M. Gierus, Friedhelm Taube Apr 2021

Effect Of Genotype And Cutting System On Agronomic And Feed Quality Characteristics Of Perennial Ryegrass (Lolium Perenne L.) Grown In Three Sites In Northern Germany, H. Salama, M. Lösche, Antje Herrmann, M. Gierus, Friedhelm Taube

IGC Proceedings (1977-2023)

No abstract provided.


The Mulberry As A Source Of Forage For Ruminants: Effects Of Stand Density And Cutting Frequency On Dry Matter Yield And Nutritive Value, H. Manterola, D. Cerda Apr 2021

The Mulberry As A Source Of Forage For Ruminants: Effects Of Stand Density And Cutting Frequency On Dry Matter Yield And Nutritive Value, H. Manterola, D. Cerda

IGC Proceedings (1977-2023)

No abstract provided.


Influence Of Cutting Date On The Protein Quality Of Forage Legumes In The Autumn Regrowth, M. Gierus, J. Kleen, Friedhelm Taube Apr 2021

Influence Of Cutting Date On The Protein Quality Of Forage Legumes In The Autumn Regrowth, M. Gierus, J. Kleen, Friedhelm Taube

IGC Proceedings (1977-2023)

No abstract provided.


Voluntary Intake And Digestibility In Horses: Individual Variability In The Effect Of Forage Quality, N. Edouard, G. Fleurance, W. Martin‐Rosset, P. Duncan, J. P. Dulphy, S. Grange, R. Baumont, H. Dubroeucq, F. J. Pérez‐Barbería, I. J. Gordon Apr 2021

Voluntary Intake And Digestibility In Horses: Individual Variability In The Effect Of Forage Quality, N. Edouard, G. Fleurance, W. Martin‐Rosset, P. Duncan, J. P. Dulphy, S. Grange, R. Baumont, H. Dubroeucq, F. J. Pérez‐Barbería, I. J. Gordon

IGC Proceedings (1977-2023)

No abstract provided.


Effect Of Essential Oils Used As Inoculants On The Nutritive Value Of Barley Silage, A. V. Chaves, J. Baah, W. Z. Yang, T. A. Mcallister, C. Benchaar Apr 2021

Effect Of Essential Oils Used As Inoculants On The Nutritive Value Of Barley Silage, A. V. Chaves, J. Baah, W. Z. Yang, T. A. Mcallister, C. Benchaar

IGC Proceedings (1977-2023)

No abstract provided.


Forage Conservation In Tropical Zones: Potential And Limitations Of Grass Silages In South America, Luiz Gustavo Nussio, José Leonardo Ribeiro Apr 2021

Forage Conservation In Tropical Zones: Potential And Limitations Of Grass Silages In South America, Luiz Gustavo Nussio, José Leonardo Ribeiro

IGC Proceedings (1977-2023)

No abstract provided.


Progress In Silage Research In Relation To Animal Production And Food Safety, N. Nishino Apr 2021

Progress In Silage Research In Relation To Animal Production And Food Safety, N. Nishino

IGC Proceedings (1977-2023)

No abstract provided.


Alfalfa Growth And Reproduction As Influenced By Plant Growth Regulators, W. H. Du, G. Wang, Z. Z. Cao, Alan W. Humphries Apr 2021

Alfalfa Growth And Reproduction As Influenced By Plant Growth Regulators, W. H. Du, G. Wang, Z. Z. Cao, Alan W. Humphries

IGC Proceedings (1977-2023)

No abstract provided.


The Master Tasks Of Forage Breeding In China, Guowen Cui, Gang Li, Huiqing Liu Apr 2021

The Master Tasks Of Forage Breeding In China, Guowen Cui, Gang Li, Huiqing Liu

IGC Proceedings (1977-2023)

No abstract provided.


Phenotypic Plasticity Of Diverse Sorghum Varieties In Response To Nitrogen Deficit Stress, Mackenzie Zwiener Apr 2021

Phenotypic Plasticity Of Diverse Sorghum Varieties In Response To Nitrogen Deficit Stress, Mackenzie Zwiener

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

The movement of nutrients from old vegetative tissue to young leaves and reproductive organs is known as senescence. Senescence can be influenced by the environment of a plant, such as, drought, heat, and nutrient stress. These environmental stressors can also influence canopy architecture. Crop canopy consists of several traits including: leaf number, angle, length and width. Past research in crops like maize and rice have shown significant influences of more erect leaves, including, the ability for increased planting density, which optimizes light interception and increases yield. In a field trial of a sorghum association panel including 345 different sorghum varieties …


Short And Long Term Effects Of Lime And Gypsum Applications On Acid Soils In A Water-Limited Environment: 3. Soil Solution Chemistry, Geoff Anderson, Shahab Pathan, David Hall, Rajesh Sharma, James Easton Apr 2021

Short And Long Term Effects Of Lime And Gypsum Applications On Acid Soils In A Water-Limited Environment: 3. Soil Solution Chemistry, Geoff Anderson, Shahab Pathan, David Hall, Rajesh Sharma, James Easton

Grain and Other Field Crops Research Articles

Aluminum (Al) toxicity imposes a significant limitation to crop production in South Western Australia. This paper examines the impact of surface-applied lime and gypsum on soil solution chemistry in the short term (1 year) and the long-term (10 years) in water limited environments. In the experiments, we measured soil solution chemistry using a paste extract on soil profile samples collected to a depth of 50 cm. We then used the chemical equilibrium model MINTEQ to predict the presence and relative concentrations of Al species that are toxic to root growth (Al associated with Al3+ and AlOH2 or Toxic-Al) and less …


Dynamic Changes Of Tannin Contents In Five Varieties Of Tropical Leguminous Forages At Different Growth Stages And Their Responses To Fertilization, Y. B. Huang, Z. T. Chen, E. Chen, B. Q. Weng, J. G. Zheng Apr 2021

Dynamic Changes Of Tannin Contents In Five Varieties Of Tropical Leguminous Forages At Different Growth Stages And Their Responses To Fertilization, Y. B. Huang, Z. T. Chen, E. Chen, B. Q. Weng, J. G. Zheng

IGC Proceedings (1977-2023)

No abstract provided.


Study On The Adaptability Of Brachiaria Spp. In Subtropical Region Of Fujian, X. H. Luo, Y. S. Lin, Z. Y. Ying Apr 2021

Study On The Adaptability Of Brachiaria Spp. In Subtropical Region Of Fujian, X. H. Luo, Y. S. Lin, Z. Y. Ying

IGC Proceedings (1977-2023)

No abstract provided.


Domestication Of Leymus Paboanus (Claus) Pilger, Dusu Wen, Hailian Sun, Chunli Bai, A. Lata Apr 2021

Domestication Of Leymus Paboanus (Claus) Pilger, Dusu Wen, Hailian Sun, Chunli Bai, A. Lata

IGC Proceedings (1977-2023)

No abstract provided.


Evaluation Of The Performance Of Seventeen Varieties Of Alfalfa (Medicago Sativa L), Yan Sun, Qingchuan Yang Apr 2021

Evaluation Of The Performance Of Seventeen Varieties Of Alfalfa (Medicago Sativa L), Yan Sun, Qingchuan Yang

IGC Proceedings (1977-2023)

No abstract provided.


Effects Of Sowing Methods And Seeding Rates On Chemical Composition Of Tephrosia Bracteolata, Olufemi S. Onifade, T. A. Amole, Alaba O. Jolaosho, O. M. Arigbede, Jimoh A. Olanite, U. Y. Anele, A. M. Oyeladun Apr 2021

Effects Of Sowing Methods And Seeding Rates On Chemical Composition Of Tephrosia Bracteolata, Olufemi S. Onifade, T. A. Amole, Alaba O. Jolaosho, O. M. Arigbede, Jimoh A. Olanite, U. Y. Anele, A. M. Oyeladun

IGC Proceedings (1977-2023)

No abstract provided.


Pengaruh Metode Pemangkasan Dan Pendekatan Hormonal Terhadap Analisis Pertumbuhan Tanaman Teh Klon Gmb 7 Pada Periode Pemetikan Produksi, Intan Ratna Dewi Anjarsari, Erdiansyah Rezamela, Heri Syahrian Khomaeni, Vitria Puspitasari Rahadi Apr 2021

Pengaruh Metode Pemangkasan Dan Pendekatan Hormonal Terhadap Analisis Pertumbuhan Tanaman Teh Klon Gmb 7 Pada Periode Pemetikan Produksi, Intan Ratna Dewi Anjarsari, Erdiansyah Rezamela, Heri Syahrian Khomaeni, Vitria Puspitasari Rahadi

Jurnal Kultivasi

Teh (Camellia sinensis L.(O) Kuntze) merupakan tanaman tahunan yang pucuknya rutin dipetik, sehingga proses fotosintesis harus optimal. Fotosintesis adalah proses fisiologis yang bertanggung jawab dalam hampir semua akumulasi bahan kering pada tanaman. Peningkatan bahan kering adalah bagian yang paling penting untuk analisis kuantitatif pertumbuhan tanaman. Tujuan penelitian ini adalah untuk menganalisis pertumbuhan pada tanaman teh setelah diberikan perlakuan jenis pangkasan, tinggi pangkasan, dan zat pengatur tumbuh. Percobaan dilaksanakan di Kebun Percobaan Pusat Penelitian Teh dan Kina, Gambung, Ciwidey. Penelitian dimulai Juli 2018 hingga Oktober 2018. Penelitian dilakukan secara deskriptif dengan membentuk model regresi polinomial untuk menentukan tinggi pangkasan dan konsentrasi …


Respons Perkecambahan Benih Jagung Manis Terhadap Konsentrasi Dan Lama Perendaman Giberelin Pada Suhu Lingkungan Yang Berbeda, Herlistin Mooy, Anne Nuraini, Sumadi Apr 2021

Respons Perkecambahan Benih Jagung Manis Terhadap Konsentrasi Dan Lama Perendaman Giberelin Pada Suhu Lingkungan Yang Berbeda, Herlistin Mooy, Anne Nuraini, Sumadi

Jurnal Kultivasi

Penanaman jagung manis pada daerah dengan suhu rendah dapat menyebabkan cekaman pada kecambah, sehingga performa kecambah perlu ditingkatkan. Penelitian ini bertujuan untuk menganalisis pengaruh interaksi antara konsentrasi giberelin (GA3) dan lama waktu perendaman benih pada suhu lingkungan tertentu terhadap pertumbuhan kecambah jagung manis. Penelitian ini dilaksanakan pada Laboratorium Teknologi Benih Fakultas Pertanian, Universitas Padjadjaran Bandung pada bulan Juni 2019. Rancangan percobaan menggunakan Rancangan Acak Kelompok pola faktorial dengan dua faktor dan tiga ulangan. Faktor perlakuan adalah konsentrasi GA3 dan lama perendaman. Faktor konsentrasi giberelin terdiri dari 50 ppm, 100 ppm dan 150 ppm, sedangkan faktor lama perendaman terdiri dari 3 …


Effects Of Selection For Seed Size On Grazing‐Type Population Of An Inter‐Specific Hybrid (Pennisetum Purpureum × P. Glaucum), R. Usberti, J. A. Usberti Jr., P. B. Alcantara, A. T. Tsuhako Apr 2021

Effects Of Selection For Seed Size On Grazing‐Type Population Of An Inter‐Specific Hybrid (Pennisetum Purpureum × P. Glaucum), R. Usberti, J. A. Usberti Jr., P. B. Alcantara, A. T. Tsuhako

IGC Proceedings (1977-2023)

No abstract provided.


Brachiaria Hybrids: Their Origin And Potential Forage Use, Esteban A. Pizarro, Michael D. Hare, John W. Miles Apr 2021

Brachiaria Hybrids: Their Origin And Potential Forage Use, Esteban A. Pizarro, Michael D. Hare, John W. Miles

IGC Proceedings (1977-2023)

No abstract provided.


Seed Production And Seed Quality Of Brachiaria Hybrids (Mulato And Mulato Ii) At Different Sites Of Thailand, Chaisang Phaikaew, Pimpaporn Pholsen, Ganda Nakamanee, Weerapon Poonpipat Apr 2021

Seed Production And Seed Quality Of Brachiaria Hybrids (Mulato And Mulato Ii) At Different Sites Of Thailand, Chaisang Phaikaew, Pimpaporn Pholsen, Ganda Nakamanee, Weerapon Poonpipat

IGC Proceedings (1977-2023)

No abstract provided.