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Articles 12001 - 12030 of 16384

Full-Text Articles in Agronomy and Crop Sciences

Expression Of The Maize Dof1 Transcription Factor In Wheat And Sorghum, Pamela A. Pena, Truyen Quach, Shirley Sato, Zhengxiang Ge, Natalya Nersesian, Taity Changa, Ismail M. Dweikat, Madhavan Soundararajan, Tom E. Clemente Jan 2017

Expression Of The Maize Dof1 Transcription Factor In Wheat And Sorghum, Pamela A. Pena, Truyen Quach, Shirley Sato, Zhengxiang Ge, Natalya Nersesian, Taity Changa, Ismail M. Dweikat, Madhavan Soundararajan, Tom E. Clemente

Department of Agronomy and Horticulture: Faculty Publications

Nitrogen is essential for plant growth and development. Improving the ability of plants to acquire and assimilate nitrogen more efficiently is a key agronomic parameter that will augment sustainability in agriculture. A transcription factor approach was pursued to address improvement of nitrogen use efficiency in two major commodity crops. To this end, the Zea mays Dof1 (ZmDof1) transcription factor was expressed in both wheat (Triticum aestivum) and sorghum (Sorghum bicolor) either constitutively, UBI4 promoter from sugarcane, or in a tissue specific fashion via the maize rbcS1 promoter. The primary transcription activation target of ZmDof1 …

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High-Throughput Profiling And Analysis Of Plant Responses Over Time To Abiotic Stress, Kira M. Veley, Jeffrey C. Berry, Sarah J. Fentress, Daniel P. Schachtman, Ivan Baxter, Rebecca Bart Jan 2017

High-Throughput Profiling And Analysis Of Plant Responses Over Time To Abiotic Stress, Kira M. Veley, Jeffrey C. Berry, Sarah J. Fentress, Daniel P. Schachtman, Ivan Baxter, Rebecca Bart

Department of Agronomy and Horticulture: Faculty Publications

Sorghum (Sorghum bicolor (L.) Moench) is a rapidly growing, high-biomass crop prized for abiotic stress tolerance. However, measuring genotype-by-environment (G x E) interactions remains a progress bottleneck. We subjected a panel of 30 genetically diverse sorghum genotypes to a spectrum of nitrogen deprivation and measured responses using high-throughput phenotyping technology followed by ionomic profiling. Responses were quantified using shape (16 measurable outputs), color (hue and intensity), and ionome (18 elements). We measured the speed at which specific genotypes respond to environmental conditions, in terms of both biomass and color changes, and identified individual genotypes that perform most favorably. With this …

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Influence Of Tillage On Common Ragweed (Ambrosia Artemisiifolia) Emergence Pattern In Nebraska, Ethann R. Barnes, Rodrigo Werle, Lowell Sandell, John L. Lindquist, Stevan Z. Knezevic, Peter H. Sikkema, Amit J. Jhala Jan 2017

Influence Of Tillage On Common Ragweed (Ambrosia Artemisiifolia) Emergence Pattern In Nebraska, Ethann R. Barnes, Rodrigo Werle, Lowell Sandell, John L. Lindquist, Stevan Z. Knezevic, Peter H. Sikkema, Amit J. Jhala

Department of Agronomy and Horticulture: Faculty Publications

Spring tillage is a component of an integrated weed management strategy for control of early emerging glyphosate-resistant weeds such as common ragweed; however, the effect of tillage on common ragweed emergence pattern is unknown. The objectives of this study were to evaluate whether spring tillage during emergence would influence the emergence pattern or stimulate additional emergence of common ragweed and to characterize common ragweed emergence in southeast Nebraska. A field experiment was conducted for three years (2014 to 2016) in Gage County, Nebraska in a field naturally infested with glyphosate-resistant common ragweed. Treatments consisted of a no-tillage control and three …

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Evaluating Soil Physical And Chemical Properties Following Addition Of Non-Composted Spent Coffee And Tea For Athletic Fields, Shuang Zhou Jan 2017

Evaluating Soil Physical And Chemical Properties Following Addition Of Non-Composted Spent Coffee And Tea For Athletic Fields, Shuang Zhou

Theses and Dissertations--Plant and Soil Sciences

Physical and chemical properties of non-composted spent coffee (CF) and tea (T) suggest they may have applications as soil amendments for improving poor soils. Studies were conducted to determine 1) the effect of amendments on grass growth and soil properties, 2) the effect of incorporation versus surface application of amendments on soil properties, and 3) the effect of amendment application frequency on grass growth and soil properties. In the first study, amendments were mixed with sand and planted to bermudagrass. Treatments included CF, T, and peat moss (PM) mixed with sand, and 100% sand as a control. In the second …

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Effects Of Fertilizer And Shade Management On Nitrogen Mineralization, Nitrifying Microbial Abundance And Nitrogen-Fixing Capacity Of Erythrina Poeppigiana In Coffee (Coffea Arabica) Agroforestry Systems In Costa Rica, Stuart E. Barker Iii Jan 2017

Effects Of Fertilizer And Shade Management On Nitrogen Mineralization, Nitrifying Microbial Abundance And Nitrogen-Fixing Capacity Of Erythrina Poeppigiana In Coffee (Coffea Arabica) Agroforestry Systems In Costa Rica, Stuart E. Barker Iii

College of Graduate Studies: Theses & Dissertations

Worldwide chemical fertilizer use has increased by four times during the last 50 years. Conventional agricultural systems have a high nitrifying nature, resulting in a loss of nearly 70% of overall nitrogen (N) fertilizer inputs, an estimated economic loss of $81 billion. Over application of fertilizer is rampant in tropical developing nations in Central America, where coffee is major crop. Agroforestry offers ecologically sustainable land management strategies that promote the provision of ecosystem services such as, protection of biodiversity, climate change mitigation, and water and soil regulation. When legume trees are incorporated as the shade tree in coffee production, direct …

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Using Gluten Index To Improve Spring Wheat Loaf Volume Prediction, Yaming Lu Jan 2017

Using Gluten Index To Improve Spring Wheat Loaf Volume Prediction, Yaming Lu

Electronic Theses and Dissertations

Wheat (Triticum aestivum L.) is the most widely cultivated crop in the world and contributes about 20% of the total dietary calories and proteins globally. Unique properties of doughs formed from wheat flour make it feasible to produce a range of food, including bread. Loaf volume is the most perceptible indicator for breadmaking quality. Selection in the early generations for loaf volume is difficult due to the requirement of the large volume of grains and due to the costly, time-consuming, and labor-intensive evaluation process. Identification of simple and reliable predictive tests for loaf volume is highly desirable. This study …

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Development Of Best Management Practices For Production Of Ethiopian Mustard (Brassica Carinata) In South Dakota, Phillip Kenneth Alberti Jan 2017

Development Of Best Management Practices For Production Of Ethiopian Mustard (Brassica Carinata) In South Dakota, Phillip Kenneth Alberti

Electronic Theses and Dissertations

Ethiopian mustard (Brassica carinata) is an alternative non-food oilseed crop which has received interest for its potential as a low-input option for production in the Northern Great Plains (NGP). As B. carinata is a new crop to the NGP, the best management practices have yet to be developed. The overall goal of this project was to develop best management practices for B. carinata production in two diverse agroenvironments in South Dakota. Two field experiments were conducted to assess the response of two B. carinata varieties to i) four seeding rates (4.5, 9, 13.5, and 18 kg ha-1 …

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Frost: Frequently Asked Questions, Department Of Primary Industries And Regional Development, Western Australia Jan 2017

Frost: Frequently Asked Questions, Department Of Primary Industries And Regional Development, Western Australia

Grain and other field crops published reports

Frequently asked questions regarding frost from the National Frost Initiative.

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Effect Of The National Accelerated Agricultural Inputs Access Subsidy Program On Fertilizer Usage And Food Production In Kakamega County, Western Kenya, Abednego Kiwia Mavuthu Jan 2017

Effect Of The National Accelerated Agricultural Inputs Access Subsidy Program On Fertilizer Usage And Food Production In Kakamega County, Western Kenya, Abednego Kiwia Mavuthu

Walden Dissertations and Doctoral Studies

Despite 25 years of concerted efforts by African governments to adopt consistent policies for increasing food production, hunger and poverty are still prevalent in the continent. Using Bernanke's conceptualization of the credit channel theory of monetary policy, the purpose of this correlational study was to investigate whether a subsidy program, the National Accelerated Agricultural Inputs Access Program (NAAIAP), affected the rates of fertilizer usage and food production in Kakamega County, Western Kenya. Purposive stratified sampling was used to select 114 participants consisting of 72 farmers in each of the 2 groups: NAAIAP beneficiaries and nonbeneficiaries. Participants completed a survey on …

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Aplikasi Pupuk Organik Terhadap Hasil Kacang Hijau (Vigna Radiate L.) Di Ultisol, Ida Widiyawati, T. Harjoso, T. T. Taufik Dec 2016

Aplikasi Pupuk Organik Terhadap Hasil Kacang Hijau (Vigna Radiate L.) Di Ultisol, Ida Widiyawati, T. Harjoso, T. T. Taufik

Jurnal Kultivasi

Permasalahan budidaya kacang hijau di Indonesia adalah produktivitas yang masih rendah dan lahan budidaya yang terbatas, sehingga dapat diatasi dengan mengoptimalkan lahan marginal seperti tanah ultisol untuk kegiatan budidaya kacang hijau. Tujuan pene-litian ini adalah untuk mengetahui varietas kacang hijau dan jenis pupuk organik yang mampu menghasilkan produksi tinggi di tanah ultisol. Penelitian dilakukan menggunakan polibag di Screen House, Fakultas Pertanian, Universitas Jenderal Soedirman pada bulan Juli-September 2015. Penelitian menggunakan Rancangan Acak Kelompok Lengkap (RAKL) dengan dua faktor. Faktor pertama adalah varietas kacang hijau yang terdiri atas tiga varietas, yaitu Vima 1, Betet, dan Murai. Faktor kedua adalah jenis pupuk, …

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Pengaruh Konsentrasi Pupuk Organik Cair (Poc) Dan Dosis Pupuk N, P, K Terhadap Pertumbuhan Dan Hasil Tanaman Jagung Manis (Zea Mays L. Var Rugosa Bonaf) Kultivar Talenta, S. Puspadewi, Wawan Sutari, Kusumiyati Dec 2016

Pengaruh Konsentrasi Pupuk Organik Cair (Poc) Dan Dosis Pupuk N, P, K Terhadap Pertumbuhan Dan Hasil Tanaman Jagung Manis (Zea Mays L. Var Rugosa Bonaf) Kultivar Talenta, S. Puspadewi, Wawan Sutari, Kusumiyati

Jurnal Kultivasi

Percobaan bertujuan untuk mencari konsentrasi pupuk organik cair dan pupuk N, P, K yang terbaik terhadap pertumbuhan dan hasil tanaman jagung manis kultivar Talenta. Percobaan dilaksanakan dari bulan Maret hingga Mei 2014 di Kebun Percobaan Fakultas Pertanian Universitas Padjadjaran, Jatinangor, Sumedang dengan ketinggian tempat ± 750 m di atas permukaan laut. Percobaan dilakukan menggunakan metode percobaan di lapangan dengan Rancangan Acak Kelompok (RAK) yang terdiri dari tujuh perlakuan dan diulang empat kali yaitu: 1 dosis rekomendasi pupuk N, P, K; 1 kali konsentrasi pupuk organik cair; 2 kali konsentrasi pupuk organik cair; 1 kali konsentrasi pupuk organik cair + ½ …

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Rerspon Tanaman Hanjeli (Coix Lacryma-Jobi L.) Akibat Kombinasi Jarak Tanam Dengan Dosis Pupuk Organik Cair Di Kecamatan Rancakalong, Agus Wahyudin, Ruminta, Yuyun Yuwariah, M. Fauzi Dec 2016

Rerspon Tanaman Hanjeli (Coix Lacryma-Jobi L.) Akibat Kombinasi Jarak Tanam Dengan Dosis Pupuk Organik Cair Di Kecamatan Rancakalong, Agus Wahyudin, Ruminta, Yuyun Yuwariah, M. Fauzi

Jurnal Kultivasi

Pertambahan jumlah penduduk yang sangat besar menyebabkan kebutuhan pangan meningkat.Salah satu alternatif yang dapat dijadikan solusi adalah program diversifikasi pangan.Hanjeli adalah salah satu tanaman pangan alternatif, namun petani belum mendalami teknik budidaya tanaman ini terutama pemupukan.Oleh karena itu dilakukan suatu upaya untuk meningkatkan pertumbuhan dan hasil hanjeli dengan kombinasi jarak tanam dengan dosis pupuk organik cair.Penelitian ini bertujuan untuk memperoleh kombinasi jarak tanam dengan dosis pupuk organik cair untuk meningkatkan hasil tanaman hanjeli. Percobaan dilaksanakan di Desa Pasir Biru, Kecamatan Rancakalong, Kabupaten Sumedang pada bulan Desember 2015 sampai dengan Mei 2016. Bibit Hanjeli yang dipergunakan adalah Hanjeli Pulut aksesi 37.Rancangan …

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Pengaruh Pupuk Pelengkap Cair Dan Sistem Olah Tanah Terhadap Pertumbuhan Dan Hasil Kacang Tanah (Arachis Hypogaea L.) Kultivar Nkancil Pada Inceptisols Jatinangor, Aep Wawan Irwan, Fiky Yulianto Wicaksono Dec 2016

Pengaruh Pupuk Pelengkap Cair Dan Sistem Olah Tanah Terhadap Pertumbuhan Dan Hasil Kacang Tanah (Arachis Hypogaea L.) Kultivar Nkancil Pada Inceptisols Jatinangor, Aep Wawan Irwan, Fiky Yulianto Wicaksono

Jurnal Kultivasi

Percobaan ini bertujuan untuk mengetahui pengaruh dosis pupuk pelengkap organik cair dan sistem olah tanah terhadap pertumbuhan dan hasil kacang tanah (Arachis hypogaea L.). Percobaan dilaksanakan di Kebun Percobaan Fakultas Pertanian, Universitas Padjadjaran, Jatinangor, dari bulan Januari 2015 sampai April 2015.Rancangan percobaan yang digunakan adalah rancangan acak kelompok (RAK) dengan 18 perlakuan dan 2 ulangan. Perlakuannya meliputi: kontrol (50 kg/ha Urea + 125 kg/ha SP-36 + 100 kg/ha KC1) + tanpa olah tanah, kontrol (50 kg/ha Urea + 125 kg/ha SP-36 + 100 kg/ha KC1) + pengolahan tanah minimum, kontrol (50 kg/ha Urea + 125 kg/ha SP-36 + 100 kg/ha …

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Pertumbuhan Dan Hasil Padi Gogo Hubungannya Dengan Kandungan Prolin Dan 2-Acetyl-1-Pyrroline Pada Kondisi Kadar Air Tanah Berbeda, A. Y. Rahayu, T. A.D. Haryanto, S. N. Iftitah Dec 2016

Pertumbuhan Dan Hasil Padi Gogo Hubungannya Dengan Kandungan Prolin Dan 2-Acetyl-1-Pyrroline Pada Kondisi Kadar Air Tanah Berbeda, A. Y. Rahayu, T. A.D. Haryanto, S. N. Iftitah

Jurnal Kultivasi

Penelitian ini bertujuan untuk mengetahui respons varietas padi gogo pada kadar air tanah berbeda terhadap pertumbuhan, hasil dan kandungan prolin dan 2-acetyl-1-pyrroline biji. Penelitian dilaksanakan di Universitas Tidar Magelang mulai bulan September 2012 sampai dengan Maret 2013. Percobaan menggunakan Rancangan Acak Kelompok Lengkap terdiri atas dua faktor yaitu varietas padi gogo (Inpago Unsoed-1, galur JSPGA 136, varietas Situ-bagendit (non-aromatik) dan varietas Mentik Wangi) dan tingkat kadar air tanah (100 % kapasitas lapang dan 50 % kapasitas lapang). Variabel pengamatan meliputi: tinggi tanaman (cm), jumlah anakan total per rumpun (batang), jumlah anakan produktif (batang), total panjang akar (m), umur berbunga (hst), …

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Pertumbuhan Dan Hasil Gandum (Triticum Aestivum L.) Yang Diberi Perlakuan Pupuk Silikon Dengan Dosis Yang Berbeda Di Dataran Medium Jatinangor, Fiky Yulianto Wicaksono, Yudithia Maxiselly, Oviyanti Mulyani, M. I. Janitra Dec 2016

Pertumbuhan Dan Hasil Gandum (Triticum Aestivum L.) Yang Diberi Perlakuan Pupuk Silikon Dengan Dosis Yang Berbeda Di Dataran Medium Jatinangor, Fiky Yulianto Wicaksono, Yudithia Maxiselly, Oviyanti Mulyani, M. I. Janitra

Jurnal Kultivasi

Pemberian silikat diketahui dapat meningkatkan aktivitas antioksidan, stabilitas membran sel, dan kandungan klorofil meningkat sehingga dapat mengatasi cekaman panas. Penelitian ini bertujuan untuk mengetahui dosis silikon yang optimum terhadap pertumbuhan dan hasil tanaman gandum yang maksimum di dataran medium. Percobaan dilakukan sejak Maret hingga Agustus 2016 di Kebun Percobaan Fakultas Pertanian Universitas Padjadjaran, Jatinangor, dengan ketinggian tempat yaitu ± 750 m di atas permukaan laut. Rancangan percobaan adalah Rancangan Acak Kelompok, terdiri dari 7 perlakuan dosis pupuk silika yang diulang 3 kali. Perlakuan terdiri dari 0, 50, 100, 150, 200, 250, dan 300 kg ha-1. Perbedaan nilai rata-rata taraf diuji …

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Pengaruh Konsentrasi Giberelin Dan Pupuk Organik Cair Asal Rami Terhadap Pertumbuhan Dan Hasil Tanaman Rami (Boehmeria Nivea (L.) Gaud) Klon Ramindo 1, Cucu Suherman, Anne Nuraini, R. Damayanthi Dec 2016

Pengaruh Konsentrasi Giberelin Dan Pupuk Organik Cair Asal Rami Terhadap Pertumbuhan Dan Hasil Tanaman Rami (Boehmeria Nivea (L.) Gaud) Klon Ramindo 1, Cucu Suherman, Anne Nuraini, R. Damayanthi

Jurnal Kultivasi

Rami adalah salah satu jenis tanaman penghasil serat yang memiliki potensi hasil lebih tinggi dibanding tanaman kapas. Salah satu faktor penentu tinggi rendahnya hasil adalah panjang dan jumlah serat, yang antara lain ditentukan oleh tinggi dan diameter batang tanaman. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi giberelin dan pupuk organik cair rami serta memperoleh salah satu kombinasi konsentrasi giberelin dan POC rami yang memberikan pengaruh terbaik pada pertumbuhan dan hasil serat tanaman rami klon Ramindo 1. Percobaan dilaksanakan dari bulan Januari 2016 sampai bulan Maret 2016 di kebun percobaan CiparanjeFaperta Universitas Padjadjaran, Jatinangor, dengan ketinggian tempat mencapai 829 m di …

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Can Sub-Saharan Africa Feed Itself?, Martin K. Van Ittersum, Lenny G. J. Van Bussel, Joost Wolf, Patricio Grassini, Justin Van Wart, Nicolas Guilpart, Lieven Claessens, Hugo De Groot, Keith Wiebe, Daniel Mason-D'Croz, Haishun Yang, Hendrik Boogard, Pepijn A. J. Van Oort, Marloes P. Van Loon, Kazuki Saito, Ochieng Adimo, Samuel Adjei-Nsiah, Alhassane Agali, Abdullahi Bala, Regis Chikowo, Kayuki Kaizzi, Mamoutou Kouressy, Joachim H. J. R. Makoi, Korodjouma Ouattara, Kindie Tesfaye, Kenneth G. Cassman Dec 2016

Can Sub-Saharan Africa Feed Itself?, Martin K. Van Ittersum, Lenny G. J. Van Bussel, Joost Wolf, Patricio Grassini, Justin Van Wart, Nicolas Guilpart, Lieven Claessens, Hugo De Groot, Keith Wiebe, Daniel Mason-D'Croz, Haishun Yang, Hendrik Boogard, Pepijn A. J. Van Oort, Marloes P. Van Loon, Kazuki Saito, Ochieng Adimo, Samuel Adjei-Nsiah, Alhassane Agali, Abdullahi Bala, Regis Chikowo, Kayuki Kaizzi, Mamoutou Kouressy, Joachim H. J. R. Makoi, Korodjouma Ouattara, Kindie Tesfaye, Kenneth G. Cassman

Department of Agronomy and Horticulture: Faculty Publications

Although global food demand is expected to increase 60% by 2050 compared with 2005/2007, the rise will be much greater in sub- Saharan Africa (SSA). Indeed, SSA is the region at greatest food security risk because by 2050 its population will increase 2.5-fold and demand for cereals approximately triple, whereas current levels of cereal consumption already depend on substantial imports. At issue is whether SSA can meet this vast increase in cereal demand without greater reliance on cereal imports or major expansion of agricultural area and associated biodiversity loss and greenhouse gas emissions. Recent studies indicate that the global increase …

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High Tunnel Tomato Variety Report Uri 2016, Andy Mark Radin Dec 2016

High Tunnel Tomato Variety Report Uri 2016, Andy Mark Radin

University of Rhode Island Vegetable Production Research Reports

No abstract provided.

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Pumpkin Variety Trial Uri 2016, Rebecca Brown Dec 2016

Pumpkin Variety Trial Uri 2016, Rebecca Brown

University of Rhode Island Vegetable Production Research Reports

No abstract provided.

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Butternut Squash Variety Trial Uri 2016, Rebecca Brown Dec 2016

Butternut Squash Variety Trial Uri 2016, Rebecca Brown

University of Rhode Island Vegetable Production Research Reports

No abstract provided.

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Dissecting Salt Tolerance In Soybean By Profiling Differential Physiological Responses Under Salt Stress, Jade Amber Newsome Dec 2016

Dissecting Salt Tolerance In Soybean By Profiling Differential Physiological Responses Under Salt Stress, Jade Amber Newsome

Graduate Theses and Dissertations

Saline soils are common worldwide and limit the yield potential of many crops. Plants respond in a variety of ways to the stress imposed by saline soils. Plants under salt stress must first sense their surroundings and transmit a signal alerting the rest of the plant to the saline conditions. Salt tolerance in soybeans is typically defined by exclusion of chloride ions from foliar tissues. Though differences in ion uptake among soybean genotypes is well documented, the key mechanisms employed by tolerant cultivars to cope with salt stress on the whole-plant level are still largely unknown. Objectives of the current …

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Residual Effects Of Nitrogen Fertilization On Soil Nitrogen Pools And Corn Growth, Meghan E. Moser Dec 2016

Residual Effects Of Nitrogen Fertilization On Soil Nitrogen Pools And Corn Growth, Meghan E. Moser

Open Access Theses

Given the dynamic nature of soil nitrogen (N), inorganic N fertilization to corn (Zea mays L.) has potential to alter N pool balance by creating an accumulation or depletion of soil N. Current corn N recommendations in the common corn-soybean rotation of Indiana strive to find the best N rate that maximizes producer profit. Increasing our understanding of soil N will inform producers if they should adjust fertilizer rates for corn to influence maintenance of organic N and Carbon. Our objective was to determine residual N effects from fertilized corn in a corn-soybean rotation by measuring (1) soil N …

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Annual Forage Cropping-Systems For Midwestern Ruminant Livestock Production, John Ernest Mcmillan Dec 2016

Annual Forage Cropping-Systems For Midwestern Ruminant Livestock Production, John Ernest Mcmillan

Open Access Dissertations

Annual forage cropping systems are a vital aspect of livestock forage production. One area where this production system can be enhanced is the integration of novel annual forages into conventional cropping systems. Two separate projects were conducted to investigate alternative forage options in annual forage production. In the first discussed research trial, two sets of crops were sown following soft red winter wheat (Triticum aestivum L.) grain harvest, at two nitrogen application rates 56 and 112 kg ha-1 . The first set of crops were C4 summer annuals seeded within two weeks of wheat grain harvest and included, brown …

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A Study Of Short-Season Winter Cover Crops For Organic High Tunnel Production Systems, Luke Riley Freeman Dec 2016

A Study Of Short-Season Winter Cover Crops For Organic High Tunnel Production Systems, Luke Riley Freeman

Graduate Theses and Dissertations

This two-year study investigated short-season winter cover crops to improve soil quality and growth of subsequent vegetable crops in an organic high tunnel production system. Five winter cover crop treatments including a nontreated control, Austrian winter peas (Pisum arvense), bell beans (Vicia faba), mustard (Brassica juncea cv. Kodiak), and Daikon radish (Raphanus sativus var. longipinnatus) were grown in a high tunnel in a randomized complete block design from mid-November to mid-March, mowed and incorporated into the soil, and followed by a succession of vegetable crops including tomato (Lycopersicon lycopersicum, cv. ‘Plum Dandy’) and broccoli (Brassica oleracea var. italica, cv. ‘Bay …

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Winter Desiccation Prevention And Recovery In Turfgrass, Darrell James Michael Dec 2016

Winter Desiccation Prevention And Recovery In Turfgrass, Darrell James Michael

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

Desiccating winters in the Northern Great Plains can lead to widespread turf death. This loss of turf results in poor aesthetics and can be financially burdensome. Financial implications include the cost of re-establishing turf and the loss of potential revenue from poor playing conditions in the spring which can both be devastating for financial success. The winter of 2013-2014 was particularly devastating, leaving many golf course superintendents re-evaluating their desiccation prevention management plans. There are many prevention practices available to turf managers that vary greatly in affordability, effectiveness, and labor. These prevention practices aim to prevent excessive water loss and …

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Mechanism Of Resistance, Gene Flow, And Integrated Management Of Ragweeds (Ambrosia) In Nebraska, Zahoor Ahmad Ganie Dec 2016

Mechanism Of Resistance, Gene Flow, And Integrated Management Of Ragweeds (Ambrosia) In Nebraska, Zahoor Ahmad Ganie

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

Common ragweed (Ambrosia artemisiifolia L.) and giant ragweed (Ambrosia trifida L.) are native annual broadleaf weeds in the United States found in diverse agroecosystems, roadsides, and wastelands. They are economically important weed species in the Midwest and sources of pollen allergies. Confirmation of glyphosate-resistant (GR) common and giant ragweed in Nebraska justified the need to determine the mechanism of resistance, dispersal of resistance genes via pollen, and to develop an integrated management program. The objectives of this research were to: 1) determine the mechanism of glyphosate resistance in a common ragweed biotype from Nebraska; 2) evaluate the effect …

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Determination Of Plant Architecture And Component Phenotyping Based On Time-Lapse Image Analysis, Srinidhi Bashyam Dec 2016

Determination Of Plant Architecture And Component Phenotyping Based On Time-Lapse Image Analysis, Srinidhi Bashyam

School of Computing: Dissertations, Theses, and Student Research

Plant breeding and the development of new food production depend on accurate measurement of different phenotypes (observable physical traits) of a plant. The plant phenotypes play a very important role in the agronomic production. The successful computation of plant phenotypes largely depends on the determination of the architecture of the plant, i.e., the arrangement of its parts (leaves, stems, flowers, etc.) relative to each other, and how the size, shape, and positions of those parts change over time. Researchers and breeders extract valuable information from these types of data to make an informed decision on which individuals to advance to …

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Arkansas Soybean Performance Tests 2016, R. D. Bond, J. A. Still, D. G. Dombek Dec 2016

Arkansas Soybean Performance Tests 2016, R. D. Bond, J. A. Still, D. G. Dombek

Arkansas Agricultural Experiment Station Research Series

Soybean variety and strain performance tests are conducted each year in Arkansas by the University of Arkansas System Division of Agriculture’s Arkansas Crop Variety Improvement Program. The tests provide information to companies developing varieties and/or marketing seed within the State, and aid the Arkansas Cooperative Extension Service in formulating variety recommendations for soybean producers.

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Effect Of Smooth Bromegrass Management On Grazing Cattle Dung Decomposition, Co2 Flux, And Soil Nutrient Movement, Bradley D. Schick Dec 2016

Effect Of Smooth Bromegrass Management On Grazing Cattle Dung Decomposition, Co2 Flux, And Soil Nutrient Movement, Bradley D. Schick

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

Rapid nutrient cycling improves forage quality and livestock production in pastures. Interseeding legumes may be a strategy to enhance N cycling, but effects of dung excreted from cattle grazing pastures with legumes on dung decomposition rates and soil N cycling have not been studied. Our objective was to evaluate how dung excreted from cattle grazing legume-interseeded, N-fertilized, and unfertilized smooth bromegrass (Bromus inermis Leyss.) pastures affects dung chemical composition, dry matter decomposition, CO­2 flux, and N availability in soil. Freshly deposited dung from yearling steers grazing legume-interseeded, N-fertilized, and unfertilized pastures was collected and placed as pats in …

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Characterization Of Ground Nozzles For Pesticide Applications, Ryan Henry Dec 2016

Characterization Of Ground Nozzles For Pesticide Applications, Ryan Henry

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

Pesticide applications are a common component of crop production systems in the United States (US). For row crop systems (e.g. corn, soybean, or wheat), pesticides are applied by ground, aerial, or chemigation methods. The exact method of pesticide delivery is not universally regulated/ prescribed in the US, and the equipment and application technique are largely defined by the individual applicator. A wide variety of choices and decisions must be made by applicators to result in a successful pesticide application. Examples of these choices include proper active ingredient(s), carrier volume and equipment (e.g. nozzle type, spacing, and operating pressure) selection while …

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