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Agronomy and Crop Sciences Commons™

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2019

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Articles 331 - 360 of 470

Full-Text Articles in Agronomy and Crop Sciences

The Evaluation Of Low-Use-Rate Zinc Fertilization Strategies On Seedling Canopy Coverage, Zn Concentration, Biomass, And Grain Yield, Maxwell David Coffin May 2019

The Evaluation Of Low-Use-Rate Zinc Fertilization Strategies On Seedling Canopy Coverage, Zn Concentration, Biomass, And Grain Yield, Maxwell David Coffin

Graduate Theses and Dissertations

Zinc (Zn) is the most common micronutrient deficiency in flooded rice (Oryza sativa L.). Some new Zn fertilization methods have been advertised, but have limited research supporting their efficacy. This study mainly compared the effect of Zn-seed treatment rate in combination with other low-use-rate Zn-fertilization methods to the standard of 11 kg Zn ha-1 as ZnSO4 on rice early-season canopy cover, tissue-Zn concentration, and grain yield. A secondary objective evaluated an alternative method (to seed treatment with ZnO) of enhancing seed-Zn concentration using post-heading foliar-Zn application on seedling tissue-Zn concentration and grain yield. For the main objective, rice seed was …

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Using Cover Crops To Recycle Nutrients In An Arkansas No-Till Corn System, Kelsey Lynn Hoegenauer May 2019

Using Cover Crops To Recycle Nutrients In An Arkansas No-Till Corn System, Kelsey Lynn Hoegenauer

Graduate Theses and Dissertations

Cover crops can provide many benefits to cropping systems including erosion control, weed suppression, and increased soil organic matter. Regardless of the intended goal for using cover crops, the changes to the nutrient flux in a cropping system caused by cover crops retaining and recycling nutrients needs to be considered in order to maximize the productivity of the following commodity crops. This research encompassed complementary greenhouse, field, and laboratory experiments to evaluate nutrient uptake and release by tillage radish (Raphanus sativus) and cereal rye (Secale cereale) cover crops, as well as the subsequent early-season recovery of recycled nutrients by the …

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Heat-Shock-Inducible Crispr/Cas9 System Generates Heritable Mutations In Rice, Soumen Nandy, Bhuvan Pathak, Shan Zhao, Vibha Srivastava May 2019

Heat-Shock-Inducible Crispr/Cas9 System Generates Heritable Mutations In Rice, Soumen Nandy, Bhuvan Pathak, Shan Zhao, Vibha Srivastava

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Transient expression of CRISPR/Cas9 is an effective approach for limiting its activities and improving its precision in genome editing. Here, we describe the heat-shock-inducible CRISPR/Cas9 for controlled genome editing, and demonstrate its efficiency in the model crop, rice. Using the soybean heat-shock protein gene promoter and the rice U3 promoter to express Cas9 and sgRNA, respectively, we developed the heat-shock (HS)-inducible CRISPR/Cas9 system, and tested its efficacy in targeted mutagenesis. Two loci were targeted in rice, and the presence of targeted mutations was determined before and after the HS treatment. Only a low rate of targeted mutagenesis was detected before …

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Assessment Of Control Of Ppo-Resistant Palmer Amaranth And Salvage Options In Herbicide-Resistant Cotton, Wyatt D. Coffman May 2019

Assessment Of Control Of Ppo-Resistant Palmer Amaranth And Salvage Options In Herbicide-Resistant Cotton, Wyatt D. Coffman

Graduate Theses and Dissertations

Palmer amaranth has been the most limiting weed in cotton production in the state of Arkansas for many years. Recently, resistance of Palmer amaranth to the protoporphyrinogen oxidase (PPO)-inhibiting site of action has been discovered at various locations across the cotton-producing region of the state. Cotton varieties have been developed with resistance to synthetic auxin (WSSA Group 4) herbicides. However, research to date has shown PPO-resistant Palmer amaranth to be more difficult to control with herbicides that target alternative sites of action. Herbicide efficacy is also known to vary with weed size, varying spray parameters, and environmental conditions. Preliminary research …

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Implications Of Rice Cultivar Selection To Optimize Returns From Crop Insurance, David Ethan Branscum May 2019

Implications Of Rice Cultivar Selection To Optimize Returns From Crop Insurance, David Ethan Branscum

Graduate Theses and Dissertations

Rice production differs from most other field crops by distinct differences in yields across cultivars and rice producers being paid for yield after post-harvest milling. Using eleven years (2003-2013) of Arkansas harvest data from performance trials in six different locations, hybrids have 19% higher paddy yields and head rice yield rate 1.7% lower than conventional cultivars. Given the 2014 Farm Bill’s emphasis on crop insurance as a risk management tool for producers, these variations in yield among cultivars have significant implications for rice producers. Comparing national level, crop insurance data on corn, soybeans and rice indicates rice producers strongly prefer …

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Pengaruh Perbedaan Waktu Turun Hujan Terhadap Aplikasi Herbisida Kalium Glifosat Dalam Mengendalikan Gulma Dominan Kelapa Sawit, Denny Kurniadie, Yayan Sumekar, Subhan Nulkarim Apr 2019

Pengaruh Perbedaan Waktu Turun Hujan Terhadap Aplikasi Herbisida Kalium Glifosat Dalam Mengendalikan Gulma Dominan Kelapa Sawit, Denny Kurniadie, Yayan Sumekar, Subhan Nulkarim

Jurnal Kultivasi

Rendahnya produktivitas kelapa sawit salah satunya disebabkan oleh adanya kompetisi tanaman dengan gulma. Pengendalian gulma dengan herbisida kalium glifosat 660 g/L sudah banyak dilakukan dan dinilai efektif. Hambatan yang terjadi yaitu terkadang turun hujan setelah aplikasi herbisida yang menyebabkan efikasi kurang efektif. Penelitian ini bertujuan untuk mengetahui ketahanan herbisida kalium glifosat 660 g/L akibat pencucian air hujan dalam mengendalikan gulma dominan pada tanaman kelapa sawit. Penelitian dilaksanakan di Rumah Kaca Fakultas Pertanian Universitas Padjadjaran Jatinangor pada bulan Februari sampai bulan April 2018. Rancangan yang digunakan dalam penelitian ini yaitu Rancangan Acak Kelompok yang terdiri dari 7 perlakuan dan 4 ulangan. …

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Model Gge Biplot Untuk Visualisasi Interaksi Genotip (G) X Naungan (E) Pada Jagung Toleran Naungan Pada Sistem Agroforestri, Muhammad Syafii, Dedi Ruswandi Apr 2019

Model Gge Biplot Untuk Visualisasi Interaksi Genotip (G) X Naungan (E) Pada Jagung Toleran Naungan Pada Sistem Agroforestri, Muhammad Syafii, Dedi Ruswandi

Jurnal Kultivasi

Jagung adalah serealia penting di Indonesia yang bernilai ekonomis dan strategis untuk dikembangkan sebagai bahan baku pangan (food), pakan (feed), dan minyak (fuel). Varietas jagung yang toleran terhadap intensitas naungan merupakan solusi tepat untuk meningkatkan produksi jagung melalui pemanfaatan lahan agroforestri. GGE biplot adalah model untuk visualisasi dan interpretasi data hasil pengujian genotipe pada lingkungan berbeda. Visualisasi aspek genotipe (G) dan lingkungan (E), dan hubungan keduanya (GXE) digambarkan sebagai biplot. Tujuan adalah untuk seleksi genotipe jagung toleran naungan pada sistem agroforestri. Penelitian dilaksanakan pada Maret-Agustus 2014 di Kebun Percobaan Cimalaka Sumedang menggunakan Split Plot Design diulang 2 kali. Data dianalisis …

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Perubahan Karakter Biokimia Dan Fisiologi Tanaman Kacang Hijau Pada Berbagai Kondisi Cekaman Kekeringan, Purwanto, Bambang Rudianto Wijonarko, Tarjoko Apr 2019

Perubahan Karakter Biokimia Dan Fisiologi Tanaman Kacang Hijau Pada Berbagai Kondisi Cekaman Kekeringan, Purwanto, Bambang Rudianto Wijonarko, Tarjoko

Jurnal Kultivasi

Penelitian ini bertujuan untuk mengkaji respons fisiologi dan biokimia tanaman kacang hijau terhadap cekaman kekeringan. Penelitian dilaksanakan di Screen House Exfarm Fakultas Pertanian Universitas Jenderal Soedirman Purwokerto dari bulan Maret sampai dengan Oktober 2018. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) dengan pola faktorial 3 x 3. Faktor pertama yang dicoba adalah tingkat kelengasan tanah, yakni kadar air kapasitas lapang sebagai kontrol, 75% kapasitas lapang, dan 50% kapasitas lapang. Faktor kedua adalah varietas unggul kacang hijau yang terdiri dari Varietas Vima 2, varietas Vima 3, dan Varietas Kutilang. Hasil penelitian menunjukkan bahwa cekaman kekeringan sampai 50 persen kapasitas …

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Mulch Treatment Effect On Weed Biomass And Yields Of Organic Sweetpotato Cultivars, Sochinwechi I Nwosisi, Dilip Nandwani, Dafeng Hui Apr 2019

Mulch Treatment Effect On Weed Biomass And Yields Of Organic Sweetpotato Cultivars, Sochinwechi I Nwosisi, Dilip Nandwani, Dafeng Hui

Biology Faculty Research

Weeds are a challenge, particularly in organic agriculture, due to restrictions on the application of synthetic herbicides and chemicals. A preliminary cultivar evaluation trial of organic sweetpotato was conducted in 2015 at Tennessee State University certified organic farm. Three mulches: wheat straw, pine needle, and black plastic mulch, along with a control (no mulch), were evaluated for their weed management abilities in a sweetpotato field. Four cultivars of sweetpotato were planted in 0.91 m wide mulch beds with 0.3 m row spacing anddrip irrigated with four replications. Data was collected during the growing season on the dry weight of weeds …

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Partisi Bahan Kering Bibit Kopi Arabika (Coffea Arabica L.) Yang Diberi Asam Humat Dan Pupuk Npk Tablet, Santi Rosniawaty, Rija Sudirja, Mira Ariyanti, Syariful Mubarok, Rachmad Akbar Apr 2019

Partisi Bahan Kering Bibit Kopi Arabika (Coffea Arabica L.) Yang Diberi Asam Humat Dan Pupuk Npk Tablet, Santi Rosniawaty, Rija Sudirja, Mira Ariyanti, Syariful Mubarok, Rachmad Akbar

Jurnal Kultivasi

Kopi merupakan salah satu produk perkebunan penghasil devisa negara. Saat ini tanaman kopi menjadi andalan beberapa daerah di Indonesia dengan kekhasannya. Namun demikian produksi kopi masih perlu ditingkatkan karena masih tidak sesuai dengan potensi produksi. Peningkatan produksi kopi dapat diawali dari pembibitan. Pengelolaan bibit yang baik dapat dilakukan dengan pemberian pupuk NPK tablet dan asam humat, yang nantinya akan mempengaruhi fotosintesis dan fotosintat yang dihasilkan. Tujuan penelitian adalah untuk melihat partisi bahan kering bibit kopi melalui bobot kering bagian-bagian tanaman pada bibit kopi yang diberi NPK tablet dan asam humat. Percobaan dilakukan di bulan Februari 2017 sampai bulan April 2017 …

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Pengaruh Pupuk Organik Tandan Kosong Kelapa Sawit Terhadap Pertumbuhan Dan Kualitas Bunga Seruni, Libria Widiastuti, Tri Pamujiasih, Srie Juli Rachmawatie Apr 2019

Pengaruh Pupuk Organik Tandan Kosong Kelapa Sawit Terhadap Pertumbuhan Dan Kualitas Bunga Seruni, Libria Widiastuti, Tri Pamujiasih, Srie Juli Rachmawatie

Jurnal Kultivasi

Seruni merupakan tanaman bunga yang paling banyak dibudidayakan di Indonesia dalam lima tahun terakhir, baik untuk pasar domestik maupun ekspor. Tingginya permintaan bunga potong menuntut pula tingginya kualitas bunga. Salah satu upaya yang dapat dilakukan adalah dengan pemberian pupuk organik tandan kelapa sawit (TKS) pada media tanam untuk pemenuhan nutrisi dan perbaikan media tanam. Tujuan penelitian ini adalah mempelajari efek interaksi varietas dan macam pupuk organik tandan kosong kelapa sawit terhadap pertumbuhan dan kualitas bunga pada tanaman seruni. Penelitian ini dilaksanakan pada bulan Juli sampai Oktober 2018 di Setiya Aji Flower Farm Bandungan Semarang Jawa Tengah dengan ketinggian tempat 800 …

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Pengaruh Perbedaan Ukuran Polen Pada Penyerbukan Buatan Terhadap Potensi Jumlah Buah Pada Tanaman Kelapa Sawit (Elaeis Guinensis Jacq.), Enceng Sobari, Ahmad Akmal Hasibuan, M. Subandi Apr 2019

Pengaruh Perbedaan Ukuran Polen Pada Penyerbukan Buatan Terhadap Potensi Jumlah Buah Pada Tanaman Kelapa Sawit (Elaeis Guinensis Jacq.), Enceng Sobari, Ahmad Akmal Hasibuan, M. Subandi

Jurnal Kultivasi

Pembentukan buah tanaman kelapa sawit yang menurun berimbas pada produksi tandan buah segar. Hal ini diakibatkan oleh penyerbukan secara alami yang kurang efektif. Tujuan penelitian ini adalah mengetahui pengaruh perbedaan ukuran serbuk sari terhadap potensi jumlah buah dalam satu tandan, persentase keberhasilan pembentukan buah, dan bentuk buah kelapa sawit dengan cara penyerbukan buatan. Metode yang digunakan merupakan metode eksperimen dengan rancangan percobaan berupa Rancangan Acak Lengkap, yang terdiri dari 2 perlakuan ukuran serbuk sari dan 3 ulangan. Perlakuan terdiri dari ukuran serbuk sari 10 mesh dan 12 mesh. Pengujian lanjut dilakukan dengan Uji Jarak Berganda Duncan. Hasil penelitian menunjukkan bahwa …

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Comparison Of Peat-Based Planting Media To Sustainably Produced Planting Medias: Watering And Other Considerations, Mary Grace Jackson Apr 2019

Comparison Of Peat-Based Planting Media To Sustainably Produced Planting Medias: Watering And Other Considerations, Mary Grace Jackson

Scholars Week

Researchers are actively addressing the questions that haunts all agriculturalists: Will we be able to feed the projected population of 9.8 billion people in 2050? Newly developed soil mixes might be the key to solving this daunting question. Research is proving that this sustainable media is a way to add nutrients back into our existing soil.

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Pengaruh Asam Humat Dan Pupuk Kandang Sapi Terhadap Pertumbuhan Tanaman Kakao (Theobroma Cacao L.) Belum Menghasilkan Klon Sulawesi 1, Arkan Azis Kusuma, Santi Rosniawaty, Yudithia Maxiselly Apr 2019

Pengaruh Asam Humat Dan Pupuk Kandang Sapi Terhadap Pertumbuhan Tanaman Kakao (Theobroma Cacao L.) Belum Menghasilkan Klon Sulawesi 1, Arkan Azis Kusuma, Santi Rosniawaty, Yudithia Maxiselly

Jurnal Kultivasi

Permasalahan tanaman kakao di Indonesia adalah produktivitasnya rendah. salah satu penyebabnya akibat kekurangan nutrisi pada fase tanaman belum menghasilkan TBM. Upaya yang dapat dilakukan adalah memberikan pupuk organik, yaitu asam humat dan pupuk kandang sapi. Percobaan ini bertujuan untuk mengetahui pengaruh macam pupuk organik (asam humat susulan dan pupuk kandang sapi) terhadap pertumbuhan tanaman kakao klon Sulawesi 1 umur 7 bulan setelah tanam. Percobaan dilakukan dari bulan September sampai dengan Desember 2017 di Kebun Percobaan Ciparanje Fakultas Pertanian Universitas Padjadjaran, Jatinangor, Kabupaten Sumedang, Jawa Barat pada ketinggian ± 752 m di atas permukaan laut (dpl). Tipe curah hujan di lokasi …

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Soil Responses To Various Farming Systems In Western Kentucky, Samantha Peterson Apr 2019

Soil Responses To Various Farming Systems In Western Kentucky, Samantha Peterson

Scholars Week

The interactions among the farming systems and the soil, water, biota, and atmosphere control the effects of cultivation on soil properties. Land conversion from forest or pasture ecosystems into crop fields altered soil properties due to the loss of soil organic matter (SOM) and the increase of soil compaction. However in Kentucky, the magnitude of the changes varied among the soil properties. Therefore, the objective of this research was to investigate the changes of selected soil properties include SOM, soil pH, and compaction under different crop fields such as corn-soybean-tobacco rotation (Field #1), continuous corn field (Field #2), hemp field …

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Evaluating Soil Surface Properties In Two Contrasting Tillage Systems, Riley Mabe, Kaeden Mollett, Marcus Robertson Apr 2019

Evaluating Soil Surface Properties In Two Contrasting Tillage Systems, Riley Mabe, Kaeden Mollett, Marcus Robertson

Scholars Week

Soil properties are affected by tillage practices. Tillage practices that provides an adequate growing environment for crops and maintains good soil structure is crucial. The objective of this study was to compare selected soil properties collected from no-till (NT) and conventional tillage (CT) systems in Kentucky, Indiana, and Illinois. Three undisturbed and three disturbed soil samples were taken from the topsoil at the depth of 0 to 7.5 cm. The samples were analyzed for bulk density (BD), water holding capacity (WHC), field capacity (FC), soil pH, soil organic matter (SOM), and compaction. Bulk density, WHC, and FC of the soil …

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Sustainability Of Organic Soil Amendments On Soil Fertility And Earthworms, Mackenzie Hoffman Apr 2019

Sustainability Of Organic Soil Amendments On Soil Fertility And Earthworms, Mackenzie Hoffman

Scholars Week

One of the growing concerns of farmers is soil fertility which is defined as the ability of soil to grow and support plant life by minerals and nutrients needed for the plants. Healthy soil leads to better yields which lead to more food produced. Traditionally, soil fertility has been maintained with the use of chemical fertilizers. This research looked at an alternative method of increasing soil fertility: the addition of a soil amendment. Chemical fertilizers can lead to an oversupply of nitrogen which can make the plants more susceptible to diseases and pests and can also reduce the colonization of …

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Chemical Amendments Of Dryland Saline–Sodic Soils Did Not Enhance Productivity And Soil Health In Fields Without Effective Drainage, Girma A. Birru, David E. Clay, Thomas M. Desutter, Cheryl L. Reese, Ann C. Kennedy, Sharon A. Clay, Stephanie A. Bruggeman, Rachel K. Owen, Douglas D. Malo Apr 2019

Chemical Amendments Of Dryland Saline–Sodic Soils Did Not Enhance Productivity And Soil Health In Fields Without Effective Drainage, Girma A. Birru, David E. Clay, Thomas M. Desutter, Cheryl L. Reese, Ann C. Kennedy, Sharon A. Clay, Stephanie A. Bruggeman, Rachel K. Owen, Douglas D. Malo

Agronomy, Horticulture and Plant Science Faculty Publications

A common restoration treatment for saline–sodic soils involves improving soil drainage, applying soil amendments (e.g., CaSO4, CaCl2, or elemental S), and leaching with water that has a relatively low electrical conductivity. However, due to high subsoil bulk densities and low drainable porosities, these treatments many not be effective in glaciated dryland systems. A 3-yr field study conducted in three model systems determined the impact of chemical amendments (none, CaCl2, CaSO4, and elemental S) on plant growth, microbial composition, temporal changes in electrical conductivity (ECe ), and the relative sodium content (%Na). …

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Río Muchacho: La Interacción Entre Agricultura Orgánica, Educación Ambiental Y Ecoturismo, Tatum Contreras Apr 2019

Río Muchacho: La Interacción Entre Agricultura Orgánica, Educación Ambiental Y Ecoturismo, Tatum Contreras

Independent Study Project (ISP) Collection

El enfoque principal de mi proyecto fue crear un documental sobre cómo Río Muchacho combinada lo orgánico, el ecoturismo y la educación ambiental. Hice mi proyecto en la provincia de Manabí cerca del pueblo Canoa. Documenté y entrevisté a todas las personas involucradas en Río muchacho- de los dueños, a los visitantes. Empecé mi proyecto el 8 de abril y terminé con la filmación y las entrevistas el 26 de abril. En la primera semana trabajé en la finca orgánica de 7 de la mañana hasta las 4 de la tarde. Las dos otras semanas trabajé de 7 a la …

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Genome-Wide Association Studies In Maize And Sorghum, Preston Hurst Apr 2019

Genome-Wide Association Studies In Maize And Sorghum, Preston Hurst

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

Genome-wide association studies are used to identify genetic variants associated with a particular phenotype. GWAS has been used in a variety of taxa, from humans, to fish to plants . The present analysis is focused on two species important to the human species: maize and sorghum. A GWAS in maize was carried out on the modification of the Ga1-s allele. The Ga1 locus has long been studied as being involved in a unilateral crossing barrier . However, it has long been suspected that the locus is modified by background genetic factors . GWAS was used to observe candidates for this …

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Modeling And Economic Analysis Of A Crop–Livestock Production System Incorporating Cereal Rye As A Forage, Eric R. Coufal Apr 2019

Modeling And Economic Analysis Of A Crop–Livestock Production System Incorporating Cereal Rye As A Forage, Eric R. Coufal

Department of Agricultural Economics: Dissertations, Theses, and Student Research

This thesis consists of two chapters using agent-based modeling for a crop-livestock production system incorporating human labor. The first chapter examines the principles used to develop a fundamental simulation pertaining to grazing cereal rye (Secale cereal L.) with calves. Within the software guidelines, the base model has the ability to capture diverse system interactions between livestock/plants and land management with human labor efficiency. AnyLogic incorporates agent-based modeling while combining with discrete event modeling and system dynamics. The purpose of the model was to find the economic returns of grazing cover crops relative to the area of Mead, Nebraska. In …

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Nutrient Management Suggestions For Corn, Charles A. Shapiro, Richard Ferguson, Charles S. Wortmann, Bijesh Maharjan, Brian T. Krienke Apr 2019

Nutrient Management Suggestions For Corn, Charles A. Shapiro, Richard Ferguson, Charles S. Wortmann, Bijesh Maharjan, Brian T. Krienke

Department of Agronomy and Horticulture: Faculty Publications

Fertilizer nutrient requirements for corn are based on expected yield and soil nutrient availability. The preplant nitrogen (N) recommendation equation, with adjustment for fertilizer cost and time of application, is retained from the previous edition of this publication. Suggestions for in-season nitrogen decisions are briefly outlined. The major change is providing a phosphorus (P) recommendation based on yield history with an implied intent to build and maintain soil test P above the critical level, which has not changed.

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Strategies To Overcome Antagonism Of Quizalofop-P-Ethyl When Applied In Mixture With Other Herbicides, Lucas C. Webster Mar 2019

Strategies To Overcome Antagonism Of Quizalofop-P-Ethyl When Applied In Mixture With Other Herbicides, Lucas C. Webster

LSU Master's Theses

A field study was conducted in 2017 and 2018 at the LSU Agricultural Center H. Rouse Caffey Rice Research Station (RRS) near Crowley, LA. to evaluate the influence of different adjuvants in overcoming the antagonism of quizalofop when mixed with bispyribac in Louisiana rice production. The antagonism of quizalofop mixed with bispyribac plus HCOC at 14 DAIT was overcome with a neutral interaction observed at 28 DAIT for barnyardgrass control with an observed control of 91%, compared with an expected control of 97%. The addition of COC, SNS or HCOC into a mixture of quizalofop plus bispyribac provided synergistic or …

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Development Of Sheath Blight-Resistant Breeding Lines For Southern U.S. Environments And Morphological And Genetic Survey Of Giant Salvinia Populations In Louisiana And Texas, Dominique Clark Galam Mar 2019

Development Of Sheath Blight-Resistant Breeding Lines For Southern U.S. Environments And Morphological And Genetic Survey Of Giant Salvinia Populations In Louisiana And Texas, Dominique Clark Galam

LSU Doctoral Dissertations

The southern US environment is a very conducive environment for agriculture and fisheries. Rice farming, shrimping and water related activities help drive the local economy. However, there are several factors that impede the success of these activities. Sheath blight (SB) disease caused by Rhizoctonia solani is one of the major biotic constraints to high grain yield and quality for most commercial U.S. rice varieties. Although different breeding lines with high levels of "partial resistance" have been developed none has been used directly as a commercial variety. The first research objective of this research was to identify and develop advanced breeding …

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Development Of A Nitrogen Recommendation Tool For Corn Considering Static And Dynamic Variables, Laila A. Puntel, Agustin Pagani, Sotirios V. Archontoulis Mar 2019

Development Of A Nitrogen Recommendation Tool For Corn Considering Static And Dynamic Variables, Laila A. Puntel, Agustin Pagani, Sotirios V. Archontoulis

Department of Agronomy and Horticulture: Faculty Publications

Many soil and weather variables can affect the economical optimum nitrogen (N) rate (EONR) for maize. We classified 54 potential factors as dynamic (change rapidly over time, e.g. soil water) and static (change slowly over time, e.g. soil organic matter) and explored their relative importance on EONR and yield prediction by analyzing a dataset with 51 N trials from Central-West region of Argentina. Across trials, the average EONR was 113 ± 83 kg N ha−1 and the average optimum yield was 12.3 ± 2.2 Mg ha−1, which is roughly 50% higher than the current N rates used …

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Impact Of Row Spacing, Sowing Density And Nitrogen Fertilization On Yield And Quality Traits Of Chia (Salvia Hispanica L.) Cultivated In Southwestern Germany, Samantha J. Grimes, Timothy D. Phillips, Filippo Capezzone, Simone Graeff-Hönninger Mar 2019

Impact Of Row Spacing, Sowing Density And Nitrogen Fertilization On Yield And Quality Traits Of Chia (Salvia Hispanica L.) Cultivated In Southwestern Germany, Samantha J. Grimes, Timothy D. Phillips, Filippo Capezzone, Simone Graeff-Hönninger

Plant and Soil Sciences Faculty Publications

To obtain high chia seed yields and seed qualities, a suitable crop management system needs to be developed for the given growing conditions in southwestern Germany. Field experiments were conducted at the experimental station Ihinger Hof in two consecutive years (2016, 2017). The study aimed to evaluate yield and quality traits of chia depending on different (i) row spacing (35, 50 and 75 cm), (ii) sowing densities (1, 1.5 and 2 kg ha−1) and, (iii) N-fertilization rates (0, 20 and 40 kg N ha−1). It consisted of three independent, completely randomized field experiments with three replications. …

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Using Drones For Precision Agriculture, Jiyul Chang, Madhav P. Nepal Mar 2019

Using Drones For Precision Agriculture, Jiyul Chang, Madhav P. Nepal

iLEARN Teaching Resources

In this teaching module, students will learn what Precision Agriculture is and how to apply drone into Precision Agriculture practices. To use data (images) taken by drone, students will learn the basic theory of Remote Sensing. Using images, students learn how to make NDVI (Normalized Difference Vegetation Index) maps and how to apply drone (remote sensing technique) in agriculture.

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Improving The Distribution And Use Of Biogas By Conversion To Methanol, Zachary Christman Mar 2019

Improving The Distribution And Use Of Biogas By Conversion To Methanol, Zachary Christman

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

In this technology review, the process of turning an average biogas into methanol will be presented. The purpose is to find a better method of transporting the energy contained within biogas so that it may be used in industry as a value added product. The first step is removal of hydrogen sulfide, a corrosive chemical that can breakdown mechanical parts. The second step is carbon capture and conversion of the biogas into hydrogen. The final step is the hydrogenation of carbon dioxide into methanol using a copper catalyst and an alcohol co-catalyst.

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Phomopsis Stem Canker Of Sunflower In North America: Correlation With Climate And Solutions Through Breeding And Management, Brent S. Hulke, Samuel G. Markell, Nolan C. Kane, Febina M. Mathew Mar 2019

Phomopsis Stem Canker Of Sunflower In North America: Correlation With Climate And Solutions Through Breeding And Management, Brent S. Hulke, Samuel G. Markell, Nolan C. Kane, Febina M. Mathew

Agronomy, Horticulture and Plant Science Faculty Publications

Climate change is occurring in the central US and is interacting with agroecological factors to increase biotic stress in sunflower. Certain species of Diaporthe cause Phomopsis stem canker in sunflower and other dicotyledonous weeds and crops. The increase in precipitation already observed in the states of North Dakota, South Dakota, and Minnesota have increased the chances of outbreaks of necrotrophic pathogens, like Diaporthe. We discuss how climate trends, combined with technological, management, and economic interactions, are correlated with increasing incidence of Phomopsis stem canker in these and adjacent areas in North America. Further, we discuss management options and the …

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Nitrogen Requirements Of Ethiopian Mustard For Biofuel Feedstock In South Dakota, Phillip Alberti, Shannon Osborne, Febina Mathew, Shakaut Ali, Heidi Sieverding, Sandeep Kumar, Thandiwe Nieya Mar 2019

Nitrogen Requirements Of Ethiopian Mustard For Biofuel Feedstock In South Dakota, Phillip Alberti, Shannon Osborne, Febina Mathew, Shakaut Ali, Heidi Sieverding, Sandeep Kumar, Thandiwe Nieya

Agronomy, Horticulture and Plant Science Faculty Publications

Ethiopian mustard (Brassica carinata A. Braun) is a non-food oilseed crop that has received attention for its potential as a low-input biofuel feedstock suitable for production in the semiarid regions of the Northern Great Plains (NGP). Because B. carinata is a new crop to the NGP, the best management practices have yet to be developed. The objective of the study was to evaluate the effects of N fertilizer rate on seed yield, seed oil concentration, and oil yield of B. carinata and to determine the economic optimum N fertilizer rates. Field studies were conducted at two locations in South …

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