Light Intensity Control For Plc-Based Hydroponic Demonstration System,
2021
University of Arkansas, Fayetteville
Light Intensity Control For Plc-Based Hydroponic Demonstration System, Christian Hitt
Biological and Agricultural Engineering Undergraduate Honors Theses
In order to demonstrate a skill set obtained through the University of Arkansas Biological Engineering, a group of students and I developed a hydroponic system where plants could be grown in a chamber. System parameters such as air quality, irrigation, and lighting were controlled by a Programmable Logic Computer (PLC) and an array of sensors and actuators. Each student focused on a certain aspect of this system, mine being the lighting. Developing this system involved researching the relationship between light intensity and plant growth, designing a system to suspend the lights above the growth chamber, and develop a system to …
Crop Response To Low-Dose Dicamba,
2021
University of Arkansas, Fayetteville
Crop Response To Low-Dose Dicamba, Mason Castner
Graduate Theses and Dissertations
The introduction of dicamba-resistant (DR) soybean [Glycine max (L.) Merr.] and cotton (Gossypium hirsutum L.) followed by a label allowing over-the-top applications of dicamba in the 2017 provided growers an additional option for broadleaf weed control. Because non-DR soybean is sensitive to low concentrations of dicamba, postemergence dicamba applications present growers choosing to plant non-DR soybean with concerns of damage from off-target movement through physical drift and volatilization of the herbicide as well as tank-contamination from prior dicamba application. Consequences of low-dose dicamba exposure on sensitive vegetative and reproductive soybean have been well researched, but little is known regarding the …
Starter Nitrogen Source And Preflood Nitrogen Rate Effects On Rice Grown On Clay Soils,
2021
University of Arkansas, Fayetteville
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 …
Short-Term Effects Of Winter Cover Crops On Soil Properties, Yield, And Partial Returns In A No-Tillage Soybean Rotation,
2021
University of Arkansas, Fayetteville
Short-Term Effects Of Winter Cover Crops On Soil Properties, Yield, And Partial Returns In A No-Tillage Soybean Rotation, Drew Dillon Kirkpatrick
Graduate Theses and Dissertations
Cover crops have the potential to provide many benefits including weed suppression, erosion control, and improvements to soil quality. These benefits can be affected by species, biomass accumulation, and management practices. Although large amounts of biomass are good for maximizing benefits, it can result in problems for establishing the subsequent crop. Soybean [Glycine max (L.) Merr.] accounts for over 50% of Arkansas crop hectares annually; therefore, understanding the effect that a cover crop can have on the following soybean crop is crucial to the successful implementation of cover crops within the state. A study was established to evaluate winter cover …
Screening And Breeding Soybean For Flood Tolerance,
2021
University of Arkansas, Fayetteville
Screening And Breeding Soybean For Flood Tolerance, Maria Roberta De Oliveira
Graduate Theses and Dissertations
Waterlogging can be detrimental to soybean [Glycine max (L.) Merr.] growth and development, with effects ranging from chlorosis and stunting to yield loss and plant death. Soybean responses to, and the effects of, waterlogging are dependent on the growth stage of the plant at the initiation of waterlogging. The objectives of this study were: (1) to assess the effectiveness of Genomic Selection (GS), Marker Assisted Selection (MAS) and Phenotypic Selection for flood tolerance at the progeny row stage as compared to random selection, for the development of high-yielding flood-tolerant lines; and (2) to compare field-screening and hydroponic greenhouse screening methodologies …
Evaluation Of Irrigation And Nutrient Management Strategies In Rice Using Alternative Irrigation Methods,
2021
University of Arkansas, Fayetteville
Evaluation Of Irrigation And Nutrient Management Strategies In Rice Using Alternative Irrigation Methods, Justin Lee Chlapecka
Graduate Theses and Dissertations
As water resources gain value across the Mid-South, alternative irrigation strategies of rice (Oryza sativa L.) have garnered increasing attention. In 2015, an estimated 1.7% of Arkansas rice hectarage used alternate wetting and drying (AWD) irrigation and 0.9% used furrow irrigation. As of 2020, 2.5% used AWD and 16.9% used furrow irrigation, the latter accounting for near 99,000 ha in Arkansas. Little information exists in the scientific literature in relation to management of rice grown in the Mid-South without a conventional flood. This fact coupled with the rapid adoption rate, especially for furrow-irrigated rice (FIR), during the last five years …
Effects Of Am Fungi From Conventional And No-Till Michigan Crop Fields On Plant And Soil Health,
2021
Grand Valley State University
Effects Of Am Fungi From Conventional And No-Till Michigan Crop Fields On Plant And Soil Health, Derek Bennett
Masters Theses
Centuries of conventional till (CT) management in agriculture has depleted soil organic matter (SOM) by over 50%. While only comprising 5% in most soils, SOM provides soil with fertility and productivity. To compensate for SOM depletion, producers have been forced to increase their reliance on fertilizer and irrigation to maintain yields. In the coming decades, climate change is expected to challenge food production and threaten an already fragile system. With no remaining land left to cultivate, conservation management strategies such as no-till (NT) look to restore SOM and increase the resilience of food production for an ever growing, increasingly food …
Economic Feasibility Of Sub-Surfaced Poultry Litter,
2021
University of Arkansas, Fayetteville
Economic Feasibility Of Sub-Surfaced Poultry Litter, James Timothy Stults
Graduate Theses and Dissertations
Livestock producers routinely spread fertilizer or broadcast poultry litter to improve forage production. With poultry litter widely available across the Southeastern United States and a cheaper source of plant nutrition than fertilizer when proximal to application sites, the novel application of litter below the soil surface, while costly, allows for greater nutrient retention than broadcasting. Since quantifying costs and benefits of sub-surface litter application (SSLA) is complex, we develop and present a spreadsheet tool for automated comparison between SSLA, fertilizer, and broadcasted litter for user-specific scenarios involving equipment choices (new, used, custom), desired nutrient needs for crops grown, litter nutrient …
Rehabilitation Practices In Cocoa Agroforestry Systems Mitigate Outbreaks Of Termites And Support Cocoa Tree Development And Yield,
2021
Université de Yaoundé I
Rehabilitation Practices In Cocoa Agroforestry Systems Mitigate Outbreaks Of Termites And Support Cocoa Tree Development And Yield, Christian T.L. Djuideu, Hervé D.B. Bisseleua, Sévilor Kekeunou, Felicitas C. Ambele
All Peer-Reviewed Publications
Most smallholder cocoa farmers in West Africa are not equipped with the necessary tools, techniques, and practices to rejuvenate their aging cocoa farms. Instead, they rather prefer to establish new cocoa farms at the expense of forest remnants. Poor management of their overaged farms has resulted in the emergence and outbreaks of new pest species such as termites feeding on the remaining productive trees and negatively affecting overall yield. We investigated how rehabilitation pruning of cocoa trees influences termite outbreaks and yield in three cocoa agroforestry systems (rustic, intermediate and full sun systems). We monitored cocoa and non-cocoa trees at …
Estimation Of Spatial Change In Cropland Area And Evaluation Of Irrigation Performance In Imperial Valley Using Remotely Sensed Data,
2021
University of Nevada, Las Vegas
Estimation Of Spatial Change In Cropland Area And Evaluation Of Irrigation Performance In Imperial Valley Using Remotely Sensed Data, Usha Poudel
UNLV Theses, Dissertations, Professional Papers, and Capstones
The Imperial Valley (IV) in the US is an extensively irrigated agricultural region, which includes multiple crops changing on an annual and semiannual basis. The valley is facing grave concerns about water management due to its semi-arid environment, water intensive crops, and limited water supply. A simple, inexpensive, and repeatable method to detect changes in cropping patterns may assist irrigation managers to understand crop diversification and associated consumptive use. In addition, a spatial assessment of existing water irrigation system performance and productivity is crucial to benchmark and improve current water management strategies. This thesis estimates the spatial pattern of change …
Transcriptional Activation Of Phytochrome-Interacting Factor 4 Is A Conserved Mechanism Of Thermomorphogenesis In Dicotyledenous Plants,
2021
University of Mississippi
Transcriptional Activation Of Phytochrome-Interacting Factor 4 Is A Conserved Mechanism Of Thermomorphogenesis In Dicotyledenous Plants, Caroline Clutton
Honors Theses
In the model dicotyledonous plant Arabidopsis thaliana, the basic helix-loop-helix (bHLH) transcription factor Phytochrome-Interacting Factor 4 (AtPIF4) plays a central role in regulating the ambient temperature-regulated hypocotyl growth response. Warm temperatures induce AtPIF4 transcription and the accumulated AtPIF4 promotes thermomorphogenesis by enhancing the expression of a group of growth-related genes. However, whether this thermo-induced growth response is universal, and more importantly, whether there is a conserved thermomorphogenetic mechanism shared in dicots is largely unknown. Here we show that higher ambient temperatures promote the hypocotyl growth in four other dicotyledonous plants, including Brassica rapa, Camelina sativa, Nicotiana benthamiana …
The Flowering Dynamics And Seedset Of Cichorium Intybus L. Cv. Puna,
2021
Guizhou Institute of Prataculture, China
The Flowering Dynamics And Seedset Of Cichorium Intybus L. Cv. Puna, Yongfeng Han, Chengbin Tang, Mouqiong
IGC Proceedings (1977-2023)
No abstract provided.
The Effects Of Time Of Application Of Nitrogen On Seed Yield, Efficiency Of N Fertilizer Use And Apparent N Fertilizer Recovery Of Russian Wildrye [Psathyrostachys Juncea (Fisch.) Nevski],
2021
China Agricultural University, China
The Effects Of Time Of Application Of Nitrogen On Seed Yield, Efficiency Of N Fertilizer Use And Apparent N Fertilizer Recovery Of Russian Wildrye [Psathyrostachys Juncea (Fisch.) Nevski], Jianguo Han, Yunwen Wang, Shengquan Jiang, Bo Liu
IGC Proceedings (1977-2023)
No abstract provided.
Seed Yield Formation Of Festulolium And Lolium X Boucheanum Under Climatic Condition Of Latvia,
2021
Latvia University of Agriculture, Latvia
Seed Yield Formation Of Festulolium And Lolium X Boucheanum Under Climatic Condition Of Latvia, Iveta Gutmane, Aleksandr Adamovich
IGC Proceedings (1977-2023)
No abstract provided.
Callus Induction And Plant Regeneration Of Poa Pratensis 'Nasu' Seeds Carried By China Recoverable Satellite Shijian‐8,
2021
Chinese Academy of Forestry, China
Callus Induction And Plant Regeneration Of Poa Pratensis 'Nasu' Seeds Carried By China Recoverable Satellite Shijian‐8, Yinghua Guo, Lei Han, Guansheng Ju, Zhenyuan Sun
IGC Proceedings (1977-2023)
No abstract provided.
Tannin Contents Of Sainfoin (Onobrycyhis Viciifolia Scop) Grown With Or Without Irrigation And Harvested At Different Growth Stages,
2021
Agriculture and Agri‐Food Canada, Canada
Tannin Contents Of Sainfoin (Onobrycyhis Viciifolia Scop) Grown With Or Without Irrigation And Harvested At Different Growth Stages, Y. Wang, T. A. Mcallister, S. N. Acharya, K. H. Ominski, D. O. Krause
IGC Proceedings (1977-2023)
No abstract provided.
Implications Of Excess Nitrogen For Intake, Diet Choice And Production Of Sheep Fed Temperate Pastures,
2021
DairyNZ, New Zealand
Implications Of Excess Nitrogen For Intake, Diet Choice And Production Of Sheep Fed Temperate Pastures, Garry C. Waghorn, G. P. Cosgrove
IGC Proceedings (1977-2023)
No abstract provided.
Sample Preparation Affects Non Structural Carbohydrates In Alfalfa,
2021
Agriculture and Agri-Food Canada, Canada
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,
2021
University of Pretoria, South Africa
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,
2021
University of Kiel, Germany
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.
