Digital Commons Network^™

Elevation And Population Size Effects On The Survival Of Drosera Rotundifolia, Jessica Williams

Electronic Theses and Dissertations

Carnivorous plants face significant conservation challenges due to habitat destruction, climate change, and illegal harvesting. This study explores how elevation and population size influence key-life history traits of D. rotundifolia, such as flowering phenology, prey capture efficiency, seed production, and germination rates. Higher elevations and larger populations are associated with extended flowering durations and increased prey capture. However, seed production and germination rates show complex patterns that are likely influenced by genetic diversity, resource availability, or environmental conditions. These insights inform targeted conservation strategies, emphasizing habitat preservation, enhancing prey availability, and maintaining genetic diversity. Public education and community engagement …

Rice Response To Struvite And Other Phosphorus Fertilizers In A Phosphorus-Deficient Soil Under Simulated Furrow-Irrigation, Jonathan B. Brye, Diego Della Lunga, Kristofor R. Brye

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Wastewater-recovered phosphorus (P), in the form of the mineral struvite (MgNH₄PO₄⋅6H₂O), may provide a sustainable alternative to decreasing rock-phosphate reserves. Struvite can be generated via precipitation methods, potentially reducing the amount of P runoff to aquatic ecosystems. The objective of this greenhouse tub study was to evaluate the effects of chemically- and electrochemically precipitated struvite (CPST and ECST, respectively) on above- and belowground plant response in a hybrid rice (Oryza sativa) cultivar grown using furrow-irrigation compared to other common fertilizer-P sources [i.e., triple super phosphate (TSP) and diammonium phosphate (DAP)]. Rice was …

Genetic Diversity And Population Structure Of Tomato (Solanum Lycopersicum) From The Usda-Grin Germplasm Collection, Ibtisam Alatawi, Haizheng Xiong, Hanan Alkabkabi, Kenani Chiwina, Qing Luo, Kai-Shu Ling, Yuejun Qu, Renjie Du, Ainong Shi

Horticulture Faculty Publications and Presentations

The genetic diversity and population structure of tomato (Solanum lycopersicum) were investigated to support breeding strategies and germplasm conservation. A total of 276 accessions from the USDA-GRIN collection were analyzed using single-nucleotide polymorphisms (SNPs) generated through genotyping by sequencing (GBS). After stringent filtering, 5162 high-quality polymorphic SNPs were retained for analysis. Population structure analysis revealed three distinct genetic groups (Q1, Q2, and Q3) among the accessions. Accessions from the USA, Asia, and Central and South America were assigned to all three groups, while accessions from Europe and Oceania were predominantly clustered within Q2. Genetic diversity indices, including major …

Responses Of Medical Cannabis To Daily Light Integrals Higher Than Summer Sunlight: Yield, Morphology, And Quality, James D. Nielson

All Graduate Theses and Dissertations, Fall 2023 to Present

Cannabis sativa L. is a crop with growing medical and commercial significance. However, cannabis is not as well studied or understood as many of the most common crops. A novel area of research surrounds how much light the plant can tolerate or use to keep increasing flower yield. In agriculture, light intensity is often measured by how many light particles interact with a given area in a second, referred to as photosynthetic photon flux density (PPFD). For example, at Utah State University in Logan, Utah, during the peak of summer, the sun's light intensity can reach about 2000 μmol·m^{-2 …}

Enhancing Selection Intensity With High-Throughput Phenotyping Data In Plant Breeding, Ashmita Upadhyay

Graduate Theses and Dissertations

Genomic prediction (GP) has proven to be an essential tool to accelerate the cultivar development pipeline by predicting the performance of un-phenotyped lines in the field of plant breeding. However, the prediction accuracy is bounded by the heritability of the target trait, limiting the efficiency of the single-trait GP model. To overcome the limitation, a multi-trait genomic prediction model using high-throughput phenotyping (HTP) data can be used to leverage secondary traits to boost the predictive ability of the target trait. This study aimed to assess the efficiency of the multi-trait (MT)- GP model powered by HTP derived secondary traits in …

Compact Solar-Powered Plasma Water Generator: Enhanced Germination Of Aged Seed With The Corona Dielectric Barrier Discharger, Yiting Xiao, Yang Tian, Haizheng Xiong, Ainong Shi, Jun Zhu

Biological and Agricultural Engineering Faculty Publications and Presentations

Seed aging adversely affects agricultural productivity by reducing germination rates and seedling vigor, leading to significant costs for seed banks and companies due to the need for frequent seed renewals. This study demonstrated the use of plasma-activated water (PAW), generated by a solar-powered corona dielectric barrier discharger, to enhance germination rates of spinach seeds that had been stored at 4 °C for 23 years. Treating seeds with PAW at 17 kV for 15 min improved germination (by 135%) and seedling growth compared to untreated seeds. Through detailed analysis, beneficial PAW properties for seed development were identified, and a molecular mechanism …

Association Mapping For Water Use Efficiency In Soybean Identifies Previously Reported And Novel Loci And Permits Genomic Prediction, Siva K. Chamarthi, Larry C. Purcell, Felix B. Fritschi, Jeffrey D. Ray, James R. Smith, Avjinder S. Kaler, C. Andy King, Jason D. Gillman

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Soybean is a major legume crop cultivated globally due to the high quality and quantity of its seed protein and oil. However, drought stress is the most significant factor that decreases soybean yield, and more than 90% of US soybean acreage is dependent on rainfall. Water use efficiency (WUE) is positively correlated with the carbon isotopic ratio ¹³C/¹²C (C13 ratio) and selecting soybean varieties for high C13 ratio may enhance WUE and help improve tolerance to drought. Our study objective was to identify genetic loci associated with C13 ratio using a diverse set of 205 soybean maturity …

Genome-Wide Association Analysis And Genomic Prediction Of Salt Tolerance Trait In Soybean Germplasm, Rongqing Xu, Qing Yang, Zhi Liu, Xiaolai Shi, Xintong Wu, Yuenhan Chen, Xingyu Du, Qiqi Gao, Di He, Ainong Shi, Peijun Tao, Long Yan

Horticulture Faculty Publications and Presentations

Introduction:

Soybean is an important protein and oil crop, and improving yield has traditionally been a major breeding goal. However, salt stress is an important abiotic factor that can severely impair soybean yield by disrupting metabolic processes, inhibiting photosynthesis, and hindering plant growth, ultimately leading to a decrease in productivity.

Methods:

This study utilized phenotypic and genotypic data from 563 soybean germplasms sourced from over 20 countries. Employing four distinct models—we performed a genome-wide association study (GWAS) using four models, including MLM, MLMM, FarmCPU, and BLINK in GAPIT 3, we conducted a Genome-Wide Association Study (GWAS) to identify single nucleotide …

Harvesting And Processing Techniques Of Tropical Grass And Legume Seeds For Smallfarmers, Lumyai Kowithayakorn, Chaisang Phaikaew

IGC Proceedings (1977-2023)

For smallfarmers of forage legumes and grasses in Thailand, manual harvesting and cleaning of leguminous seeds have been widely practised because of cheap and available labour. Tropical grasses produce more seeds than can be harvested; hence it is necessary to find means to improve harvesting and processing techniques in order to obtain high standards of both quality and quantity of seed. The main obstacles could be due to prolonged flowering nnd grain filling periods of individual seedheads resulting in the uneven ripening of seeds at harvest. Premature seeds cause low yields and low quality nt harvests in many species. Flowering …

Yield, Composition And In Vitro Digestibility Of Russell Lupin, S M. Kitessa, G D. Hill, A M. Nicol

IGC Proceedings (1977-2023)

Six harvests were made (at 3-weekly intervals) from spring regrowth of Russell lupin (Lupinus polyphyllus x Lupinus arboreus ) to evaluate changes in yield and nutritive value with plant maturity. Dry matter (DM) yield and neutral detergent fibre (NDF) concentration increased from 40 to 160 g/plant and 24 to 46%, respectively, while nitrogen concentration, in vitro cellulase DM and organic matter digestibility decreased from 4.5-2.4%, 77-56% and 81-55%, respectively, as the lupins matured from late vegetative to hard pod stage. Peak digestible DM (DDM) yields of Russell lupins, at about 90 g/plant, occurred at full bloom and dry pod, …

Ruzi Grass (Brachiaria Ruziziensis) Seed Production In North-East Thailand, Chaisang Phaikaew, Chanchai Manidool, Pimpaporn Devahuti

IGC Proceedings (1977-2023)

The recent expansion of beef and dairy production in Thailand has increased demand for pasture seed. Ruzi grass (Brachiaria ruziziensis) seed production has increased from 18 tin 1983 to 466 tin 1991. The; production sites are in the north east, where soils and climate are most suitable for seed production. 60% of all ruzi seed is being produced by smallfarmers; the rest is produced by government stations. Average farmer yield of rilzi is 400 kg • seed/h'a, with each farmer contracted 'to grow 0.32 h�� of ruzi grass, at a guaranteed price of US$2/kg; Abo·ut 2700 farmers are …

Winter Cold Temperate Rangelands: Improvement Strategies For Intensive Rangeland Ecosystems, B E. Allan, D Scott

IGC Proceedings (1977-2023)

Transfer of developed grassland technologies to rangelands is discussed in terms of environmental gradients and the options and constraints they impose. Winier feed limitation can be overcome through conserved feeds and various in situ systems involving special purpose pastures and feed banks. General animal nutrition can be improved through intensive development, low input systems, better control of range utilisation and, where appropriate, correction of mineral deficiencies. The emphasis in seeking quick and easy solutions to rangeland management problems is questioned, A more informed, environmentally sound and sustainable approach to rangeland fanning atlitudes and management is proposed. A stepwise process to …

Responses Of Salvia Nemorosa L. To Silver Nanoparticle And Methyl Jasmonate Stimuli Under Salt Stress, Bi̇lal Andi̇ç, Pinar Orcan

Turkish Journal of Botany

The present study evaluated the effects of methyl jasmonate (MeJA) and silver nanoparticles (AgNP) on Salvia nemorosa L. under NaCl stress. To this end, total soluble sugar, total phenolic and flavonoid contents, total antioxidant capacity, H2O2 content, photosynthetic pigment, MDA, and proline contents, and enzymatic antioxidant activities were assessed. When the results for photosynthetic pigment contents were evaluated, the highest levels of total carotenoid content, chlorophyll a, and chlorophyll b were obtained with NaCl + AgNP + MeJA treatment. Under NaCl stress, MDA and H2O2 levels increased, but they decreased when AgNP and MeJA were applied. All treatment groups had …

Puccinellia (Puccinellia Ciliata) For Dryland Salinity Management, Department Of Primary Industries And Regional Development, Western Australia

Natural resources factsheets

Puccinellia (Puccinellia ciliata) is a potentially valuable fodder on waterlogged saline land. Puccinellia, Distichlis and marine couch are the most salt tolerant of the commercially available grasses. It is best suited to areas with more than 400mm annual rainfall and where the watertable is shallow over summer.

The Department of Primary Industries and Regional Development recommends that any dryland salinity management is part of a whole farm, and preferably a whole catchment, water management plan.

Nebline, November/December 2024

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Positive Insights Shared Regarding CHIME: Head Start University Partnership Project, Jaci Fogel

Diabetes Awareness: Small Changes, Big Impact, Kayla Colgrove

Recipe of the Month: Turkey Cranberry Meatballs, Kayla Colgrove

Commercial/ Noncommercial Pesticide License

Love Gardening? Become a Master Gardener!

Garden Guide: Things to Do This Month

Upcoming Green Industry Conferences

Managing the Demands of Water & Wastewater Systems Can Make Gatherings More Enjoyable, Becky Schauerman

It’s Time to Plant Fall Cover Crops, John Nelson

A Quick Guide to Fleas, Kait Chapman

Heart of 4-H Award: Shane Cuttlers and Dena Noe

4-H Specialty Clubs Invite New Members

Nebraska 4-H Fed Steer …

Guide To Supplementary Feeding And Budgeting, Department Of Primary Industries And Regional Development, Western Australia

Animal production and livestock factsheets

Supplementary feeding of sheep, with grain, hay or silage is necessary when pastures or stubbles are deficient in energy and protein.

A good supplementary feeding program will ensure sheep utilise as much dry paddock feed as possible as well as provide sufficient supplementary feed for maintenance or growth.

The Department of Primary Industries and Regional Development recommends supplementary or confined paddock feeding to maintain livestock productivity and avoid animal welfare and soil erosion problems.

Forage News [2024-11], University Of Kentucky

Forage News

No abstract provided.

Lupin Root Diseases - Diagnosis And Management, Department Of Primary Industries And Regional Development, Western Australia

Grains and other field crops factsheets

Root, hypocotyl and stem base diseases can be significant problems in lupin crops, reducing stand density, plant vigour and yield. Root disease is present in nearly all narrow leafed lupin (Lupinus angustifolius) paddocks but in the majority of paddocks has only a small impact on crop development. However, in paddocks where high levels of root rot occurs, plant establishment, seedling vigour and crop yield can be significantly affected.

When a root disease is present in a crop very little can be done to manage it in that cropping season. It is therefore vital that the cause is correctly identified to …

Time Of Lambing, Department Of Primary Industries And Regional Development, Western Australia

Animal production and livestock factsheets

Choosing the best time of lambing, and matching paddock feed availability to ewe and weaner needs is important for both productivity and profitability. The ewes' natural breeding season will also affect reproductive rates. The ewe flock is the key flock on the farm, so it is important to set up a system that matches their needs with the feedbase. A ewe’s condition will vary over the season depending on the feed available and her needs. A ewe’s energy needs will double in late pregnancy and triple in lactation. Having enough feed to meet her changing needs is important for production …

Pre-Plant Fertiliser For Brassica Crops On Loams, Department Of Primary Industries And Regional Development, Western Australia

Horticulture factsheets

Fertiliser is a major input cost in vegetable production along with labour and seedling costs. Optimising fertiliser rates and application methods is important to gain maximum benefit. The following information is based on trials carried out from 2008 to 2010 on broccoli and cauliflower crops grown in karri loams at Manjimup, about 300 kilometres south-west of Perth, Western Australia.

Trial results indicate that changes can be made to rates and application methods to optimise fertiliser use. Changes to application methods include strip incorporation of granular fertilisers and the potential for using liquid phosphorus for pre-transplant application.

Designing A Decision-Support Tool For Fertilizer Recommendations In Oil Palm Smallholders, Rana Farrasati

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

Oil palm (Elaeis guineensis Jacq.), originally from West Africa, now accounts for 42% of global vegetable oil production and mainly includes key regions cultivated in tropical regions of Southeast Asia, West Africa, South America, and Central America. Despite its economic significance, the oil palm industry faces challenges of stagnant yields and large yield gaps, particularly among independent smallholders. These issues often stem from inadequate nutrient management practices and limited agronomic knowledge. Our objective was to quantify nutrient requirements for mature oil palm plantations as a basis to design a decision support tool (DST) for fertilizer recommendations. To do so, …

Digital Agriculture Approaches: Uav-Based N Monitoring And Machine Learning For Maize Yield Prediction, And N Response Assessment Across Rice Varieties, Rejina Adhikari

LSU Master's Theses

Sustainable agriculture is essential for addressing global challenges such as food security, environmental degradation, and climate change while ensuring high productivity and resource conservation. Precision agriculture technologies, like UAV-based remote sensing and advanced sensors, offer tools to monitor real-time crop health, soil conditions, and nutrient levels, aiding in informed decision-making and resource optimization. In this research, field trials were conducted in maize and rice to assess the effectiveness of NDRE (Normalized Difference Red Edge) obtained from UAV-based remote sensing for nitrogen management. For maize, the study demonstrated that NDRE accurately assessed nitrogen levels during critical growth stages, with yields ranging …

Effects Of Cultivars And Fungicides On Foliar Fungal Diseases And Fusarium Head Blight In Winter Wheat, Mahnoor Asif

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Foliar fungal diseases and Fusarium head blight (FHB) are among the major causes of significant yield losses in wheat production, particularly in Nebraska. Resistant cultivars and fungicide applications are common management strategies, but the overuse of fungicides has raised concerns about resistance in Fusarium graminearum populations in Nebraska. This study evaluated the effects of cultivar resistance, fungicide timing and their economic benefits. It also assessed the sensitivity of Nebraska isolates of F. graminearum and F. boothii to a triazole fungicide. In 2022 and 2024, 14 fungicide treatments and a control were arranged in a split-plot experimental design with …

Confined Paddock Feeding And Feedlotting Of Sheep, Department Of Primary Industries And Regional Development, Western Australia

Animal production and livestock factsheets

Confinement feeding (also referred to as lot feeding or feedlotting) is an intensive feeding system in a confined area where all, or the majority of, feed and water is supplied to the contained animals. The department recommends using confinement feeding as part of a whole farm livestock, pasture and erosion management program.

We recommend having a confinement feeding system as an integral part of a whole farm livestock, pasture and erosion management program. Guides and resources that provide more detailed information are listed at the bottom of this fact sheet.

Sheep Feed Value Guide, Department Of Primary Industries And Regional Development, Western Australia

Animal production and livestock factsheets

Sheep are supplementary fed for either survival or production purposes. Efficient supplementary feeding should aim to supply sheep with a diet that is sufficient in digestible energy and protein. We recommend testing feedstuffs, although the feed tables supplied here can be used to help roughly estimate the amount of grain and fodder required.

Knowing the value of different feedstuffs is critical when making decisions about livestock nutrition, for survival, maintenance and growth.

Supplementary feeding is a key part of a Western Australian (WA) sheep enterprise because most sheep systems are on annual pasture which is dry over the Mediterranean summer. …

Comparison The Impact Of Co2 And Uvb On Moringa Peregrina And Moringa Oleifera Growth Under Open Top Chamber, Omar Mohammed Alshehhi

Theses

Climate change has had a tremendous impact on ecosystems, with an apparent connection between farming methods and environmental change. Climate change has a substantial effect on both abiotic and biotic factors that affect crop plants. The increasing number of abiotic stressors has highlighted the impact of global warming on plant productivity. This study compared and evaluated the abiotic stress resistance of two Moringa species (Moringa oleifera and Moringa peregrina) to UV radiation, increased CO₂ levels, and their combined effects. The evaluation mainly focused on key morphological features, including plant height (cm) and fresh and dry weights, to assess …

Improving Rice Yield Using Sensor Based Nitrogen Application And Best Management Practices (Bmps) In Rice-Soybean And Rice-Crawfish Rotational Systems, Charles Darnall

LSU Master's Theses

Sustainable rice farming requires effective nutrient management and conservation practices to maintain high yields and minimize environmental impact. Implementing best management practices (BMPs) promotes lower fertilizer application rates, increased N use efficiency, improves soil health, and water quality. Demonstration fields established in two different rotational cropping systems (rice-soybean and rice-crawfish) in Kaplan, LA in 2023. In each rotation system, the benefits of BMPs (sensor based mid-season N management and cover cropping) compared to farmer’s practice (FP) were evaluated using yield, yield components, soil and water quality as metrics. The rice-soybean fields in 2023 and 2024 were both planted with PVL03 …

Compost Comparison In High Tunnels, Elizabeth Maynard, Marian Rodriguez-Soto, Rebecca Koetz

Midwest Vegetable Trial Reports

Compost is frequently used in market garden production systems, both in the field and in high tunnels. This trial was conducted in northern Indiana to evaluate four composts for use in high tunnel tomato production, with primary emphasis on their value as sources of macronutrients. The results reported here document effects of the composts on tomato yield, leaf tissue nutrient concentrations, and soil nutrients at the end of one growing season.

Electric Interrow Control Of Lupine Plants Does Not Adversely Affect The Neighboring Non-Target Lupine Plants, Catherine Borger, Miranda J. Slaven

Journal articles

Interrow weed control is used in a wide range of crops, traditionally applied via physical cultivation or banded herbicide application. However, these methods may result in crop damage, development of herbicide resistance, or off-target environmental impacts. Electric interrow weed control presents an alternative, although its potential impact on crop yield requires further investigation. One of the modes of action of electric weed control is the continuous electrode–plant contact method, which passes a current through the weed and into the roots. As the current passes into the roots, it can potentially disperse through the soil to neighboring root systems. Such off-target …

Exploring The Interconnectivity Between Soilless Substrate Hydraulic Properties And Plant Root Morphology, Kristopher S. Criscione

LSU Doctoral Dissertations

Horticultural container production heavily relies upon porous soilless substrates to mass produce specialty crops. Soilless substrates are responsible for continuously maintaining optimal water, mineral nutrients, and air balances to promote healthy root growth and support productive shoot yield (foliage or fruit). Increasing evidence of substrate research continues to highlight the strong relationships associated with root development and substrate physiochemical properties. Despite the importance of the root system for overall plant health, most horticultural research to-date has focused on shoot development. Research tends to report total root biomass as the primary root-growth metric; however, this results in several developmental features becoming …