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2017

Horticulture

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Full-Text Articles in Life Sciences

Use Of An Alternative Natural Weed Suppressant: Effects Of Parboiled Rice Hull Mulch On The Growth Of Container Weeds, Amy R. Fields-Taylor, Vanessa Slinger-Friedman Dec 2017

Use Of An Alternative Natural Weed Suppressant: Effects Of Parboiled Rice Hull Mulch On The Growth Of Container Weeds, Amy R. Fields-Taylor, Vanessa Slinger-Friedman

The Kennesaw Journal of Undergraduate Research

The Chattahoochee Nature Center (CNC) is one of the leading educational centers in Georgia about the ecology of the Chattahoochee River. Due to lack of man power, keeping down the weeds in the CNC plant nursery is one of those tasks that often gets left undone. The nursery becomes overgrown with invasive weed species. Understandably, they must sometimes resort to the use of herbicides, such as Roundup®, to keep the hundreds of native and endangered species of plants housed at CNC from being choked out by invasive weeds. This study tests the ability to suppress weed growth by use of ...


Horticulture For Pollinator Conservation, Carter M. Westerhold Dec 2017

Horticulture For Pollinator Conservation, Carter M. Westerhold

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Pollinators worldwide are declining. Consequently, the agricultural and ecological services these insects provide are in danger of being lost. Land use intensification, via urbanization, has greatly influenced this decline in pollinators. Luckily, through targeted horticultural practices, stable populations of pollinators can be sustained within urban areas. The horticultural practices of planting diverse floral resources and managing pollinator habitat in urban areas can sustain these populations. Two studies were conducted with the intent to identify horticultural knowledge gaps that could be reduced to aid in pollinator conservation efforts. First, a study to compare Nebraska native and non-native ornamental plants was conducted ...


Arkansas Soybean Performance Tests 2017, R. D. Bond, J. A. Still, D. G. Dombek Dec 2017

Arkansas Soybean Performance Tests 2017, 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.


Shallow Aggregate Ebb-And-Flow System For Greenhouse Lettuce Production, Joseph Chidiac Dec 2017

Shallow Aggregate Ebb-And-Flow System For Greenhouse Lettuce Production, Joseph Chidiac

Graduate Theses and Dissertations

A novel soilless technique for the production of lettuce was developed and evaluated for its viability for ornamental greenhouse growers adapting their ebb-and-flood irrigation benching systems to diversify into growing lettuce, without having to purchase the conventional nutrient film technique (NFT) or deep flow technique (DFT) hydroponic systems. The experimental design was a three by four factorial, with three treatments for aggregate depth (19, 38, and 57 mm) and four treatments for irrigation frequency (once every 1, 2, 4, or 8 hours), for a total of twelve treatment combinations. Each treatment was replicated three times in a randomized complete block ...


New Technologies For Evaluating Putting Green Surface Characteristics, Daniel Patrick O'Brien Dec 2017

New Technologies For Evaluating Putting Green Surface Characteristics, Daniel Patrick O'Brien

Graduate Theses and Dissertations

Golf course putting greens require a high level of inputs predicated on timely, well informed decisions. Putting green quality is ultimately defined by performance of the turfgrass, and this performance encompasses both (i) the health and vitality of the turfgrass plants, and (ii) the ability of the turfgrass to exist as a playing surface, as it interacts with the golf ball. For golf course superintendents, accurately and efficiently assessing moisture levels and nutrient status are critical for guiding maintenance practices. This research sought to examine new ways for measuring each of these parameters, and compared them to ground-truth data and ...


Evaluation Of Insecticide Seed Treatments To Protect Rice (Oryza Sativa) Against Various Herbicides, Steven Michael Martin Dec 2017

Evaluation Of Insecticide Seed Treatments To Protect Rice (Oryza Sativa) Against Various Herbicides, Steven Michael Martin

Graduate Theses and Dissertations

The increase in herbicide-resistant weeds in Arkansas crop fields has led to the need for new herbicide modes of action for use in all crops. This need has led to the introduction of technologies that can be devastating to conventional rice crops. Field observation, noted that insecticide seed treatments used in rice could potentially reduce the effects of off-target movement of herbicides onto rice crops and possibly reduce the negative effects of some herbicides applied directly to rice. Research was conducted to determine if insecticide seed treatments could reduce the harmful effects of drift from imazethapyr and glyphosate onto conventional ...


Better Health Through Horticulture: Using Horticulture To Influence Behavior And Reduce Stress, Rachel Ochylski Nov 2017

Better Health Through Horticulture: Using Horticulture To Influence Behavior And Reduce Stress, Rachel Ochylski

All NMU Master's Theses

Horticultural intervention in the form of gardening workshops connect participants to nature while they nurture another living organism. Horticultural intervention provides opportunities to socialize and engage in a meaningful activity, which have been recognized as helpful in the treatment of common mental health difficulties such as depression and anxiety. There is a lack of experimental studies based on quantitative data that focus on the effects of horticulture on holistic human health. The author evaluated the effects of a horticultural intervention on two separate groups, older adults and college students. The behavioral effects of engaging in gardening activities were evaluated using ...


Impact Of Preemergent Herbicides, Mowing Height, And Fertilization On Centipedegrass Root Architecture And Drought Tolerance, Mike J. Adams Oct 2017

Impact Of Preemergent Herbicides, Mowing Height, And Fertilization On Centipedegrass Root Architecture And Drought Tolerance, Mike J. Adams

LSU Master's Theses

Mowing, N fertilization and the application of preemergence herbicides (PRE) are cultural practices performed on centipedegrass to improve overall turf quality. It is posited that increasing mowing height and application of fertilizers can lead to greater turfgrass rooting and increase drought survival; while the application of PRE is reported to potentially have negative impacts on rooting. At two locations in Louisiana, studies examining the effects of these practices on centipedegrass rooting and drought tolerance were conducted.

In the first 11-week study conducted, centipedegrass was treated with dithiopyr, pendimethalin, prodiamine, simazine, or indaziflam at the manufacturers’ labeled rates. During the 11-wk ...


Optimization Of Overhead Irrigation In Relation To Irrigation Water Use Efficiency In The Louisiana Nursery Industry, Mark A. Wilson Oct 2017

Optimization Of Overhead Irrigation In Relation To Irrigation Water Use Efficiency In The Louisiana Nursery Industry, Mark A. Wilson

LSU Master's Theses

Irrigation efficiency is an essential component of nursery production in the United States. To increase productivity of Louisiana growers, a series of studies were conducted to evaluate current nursery water practices. The objectives were to determine current irrigation practices; evaluate actual water usage; and compare nursery media for water utilization. A mailed survey determined that the majority of growers used can yard production (63%), overhead irrigation (79%), had no irrigation manager (82%) and did not collect/reuse water(61%); 50% do not test/calibrate their irrigation system. Based on this information, five nurseries using overhead irrigation were selected to determine ...


Substantial Contribution Of Genetic Variation In The Expression Of Transcription Factors To Phenotypic Variation Revealed By Erd-Gwas, Hung-Ying Lin, Qiang Liu, Xiao Li, Jinliang Yang, Sanzhen Liu, Yinlian Huang, Michael J. Scanlon, Dan Nettleton, Patrick S. Schnable Oct 2017

Substantial Contribution Of Genetic Variation In The Expression Of Transcription Factors To Phenotypic Variation Revealed By Erd-Gwas, Hung-Ying Lin, Qiang Liu, Xiao Li, Jinliang Yang, Sanzhen Liu, Yinlian Huang, Michael J. Scanlon, Dan Nettleton, Patrick S. Schnable

Agronomy & Horticulture -- Faculty Publications

Background: There are significant limitations in existing methods for the genome-wide identification of genes whose expression patterns affect traits.

Results: The transcriptomes of five tissues from 27 genetically diverse maize inbred lines were deeply sequenced to identify genes exhibiting high and low levels of expression variation across tissues or genotypes. Transcription factors are enriched among genes with the most variation in expression across tissues, as well as among genes with higher-than-median levels of variation in expression across genotypes. In contrast, transcription factors are depleted among genes whose expression is either highly stable or highly variable across genotypes. We developed a ...


Identifying Ecologically Relevant Scales Of Habitat Selection: Diel Habitat Selection In Elk, Caleb P. Roberts, James W. Cain Iii, Robert D. Cox Oct 2017

Identifying Ecologically Relevant Scales Of Habitat Selection: Diel Habitat Selection In Elk, Caleb P. Roberts, James W. Cain Iii, Robert D. Cox

Agronomy & Horticulture -- Faculty Publications

Although organisms make resource selection decisions at multiple spatiotemporal scales, not all scales are ecologically relevant to any given organism. Ecological patterns and rhythms such as behavioral and climatic patterns may provide a consistent method for identifying ecologically relevant scales of habitat selection. Using elk (Cervus canadensis) as an example species, we sought to test the ability of behavioral patterns to empirically partition diel scales for modeling habitat selection. We used model selection to partition diel scales by shifts in dominant behavior and then used resource selection probability functions to model elk habitat selection hierarchically at diel scales within seasons ...


Glycemic Response To Black Beans And Chickpeas As Part Of A Rice Meal: A Randomized Cross-Over Trial, Donna M. Winham, Andrea M. Hutchins, Sharon V. Thompson Oct 2017

Glycemic Response To Black Beans And Chickpeas As Part Of A Rice Meal: A Randomized Cross-Over Trial, Donna M. Winham, Andrea M. Hutchins, Sharon V. Thompson

Food Science and Human Nutrition Publications

Legumes, such as black beans (Phaseolus vulgaris L.) and chickpeas (Cicer arietinum L.), have a low glycemic index, and may reduce the glycemic load of meals in which they are included. Although the low glycemic response of beans consumed alone has been documented, few studies have examined the glycemic response to traditional food combinations such as black beans and rice or chickpeas and rice. This randomized cross-over study examined the glycemic and insulinemic impact of 50 grams of available carbohydrate from three test meals: plain white rice (control), black beans with rice, and chickpeas with rice among healthy adult women ...


Book Review Of Serendipity: An Ecologist’S Quest To Understand Nature, E. E. Ball, D. M. Adams, J. N. Dupuie Jr., M. M. Jones, P. G. Mcgovern, R. M. Ruden, S. R. Schmidt, G. J. Vaziri, J. S. Eeling, B. D. Kirk, A. L. Mccombs, A. B. Rabinowitz, K. M. Thompson, Z. J. Hudson, Robert W. Klaver Oct 2017

Book Review Of Serendipity: An Ecologist’S Quest To Understand Nature, E. E. Ball, D. M. Adams, J. N. Dupuie Jr., M. M. Jones, P. G. Mcgovern, R. M. Ruden, S. R. Schmidt, G. J. Vaziri, J. S. Eeling, B. D. Kirk, A. L. Mccombs, A. B. Rabinowitz, K. M. Thompson, Z. J. Hudson, Robert W. Klaver

Natural Resource Ecology and Management Publications

A common thought among graduate students is: “how do established scientists get where they are today?” In Serendipity: An Ecologist’s Quest to Understand Nature, James Estes offers a personal reflection on research experiences spanning his 50-year career, beginning as a Ph.D. student in 1970 and concluding with recognition as a member of the National Academy of Sciences in 2014. Estes chronologically outlines the foundational trophic cascade ecology research that he and colleagues conducted in the Aleutian Islands, examining key relationships among kelp forests, sea otters, sea urchins, and killer whales through anecdotal stories of achievement and challenge. Estes ...


Assessing A Reciprocal International Student Travel Exchange: The Iowa State University And University Of Costa Rica Intercambio, Mark L. Gleason, Amy Wang Wong, Donald R. Lewis, Luis Felipe Arauz Cavallini, Barbara Clawson, Kevin R. Duerfeldt, Hayley M. Nelson, Gaile R. Nonnecke Oct 2017

Assessing A Reciprocal International Student Travel Exchange: The Iowa State University And University Of Costa Rica Intercambio, Mark L. Gleason, Amy Wang Wong, Donald R. Lewis, Luis Felipe Arauz Cavallini, Barbara Clawson, Kevin R. Duerfeldt, Hayley M. Nelson, Gaile R. Nonnecke

Entomology Publications

The creation and educational impact of a reciprocal travel exchange program for student groups in horticulture and allied sciences between Iowa State University (ISU) and the University of Costa Rica (UCR) are described. The program, called the “Intercambio,” (“exchange,” in English), has facilitated group travel for 10- to 12-day periods to farms and agricultural research centers in the host country annually since 1999. The article explores how the Intercambio began and factors that have helped to sustain it, to provide ideas for educators interested in initiating similar exchanges. Analysis of responses to a 2015 written survey of student participants indicated ...


Arkansas Corn And Grain Sorghum Peformance Tests 2017, R. D. Bond, J. A. Still, D. G. Dombek Oct 2017

Arkansas Corn And Grain Sorghum Peformance Tests 2017, R. D. Bond, J. A. Still, D. G. Dombek

Arkansas Agricultural Experiment Station Research Series

Corn and grain sorghum performance tests are conducted each year in Arkansas by the University of Arkansas System Division of Agriculture. The tests provide information to companies marketing seed within the state, and aid the Arkansas Cooperative Extension Service in formulating recommendations for producers.


Effects Of Nitrogen And Phosphorus Fertilizer And Topsoil Amendment On Native Plant Cover In Roadside Revegetation Projects, Heidi L. Hillhouse, Walter H. Schacht, Jonathan M. Soper, Carol E. Wienhold Oct 2017

Effects Of Nitrogen And Phosphorus Fertilizer And Topsoil Amendment On Native Plant Cover In Roadside Revegetation Projects, Heidi L. Hillhouse, Walter H. Schacht, Jonathan M. Soper, Carol E. Wienhold

Agronomy & Horticulture -- Faculty Publications

Establishing vegetation on roadsides following construction can be challenging, especially for relatively slow growing native species. Topsoil is generally removed during construction, and the surface soil following construction (“cut-slope soils”) is often compacted and low in nutrients, providing poor growing conditions for vegetation. Nebraska Department of Transportation (NDOT) protocols have historically called for nitrogen (N) and phosphorus (P) fertilization when planting roadside vegetation following construction, but these recommendations were developed for cool-season grass plantings and most current plantings use slower-establishing, native warmseason grasses that may benefit less than expected from current planting protocols. We evaluated the effects of nitrogen and ...


Stability Of Cacopsylla Pyricola (Hemiptera: Psyllidae) Populations In Pacific Northwest Pear Orchards Managed With Long-Term Mating Disruption For Cydia Pomonella (Lepidoptera: Tortricidae), Kaushalya G. Amarasekare, Peter W. Shearer Sep 2017

Stability Of Cacopsylla Pyricola (Hemiptera: Psyllidae) Populations In Pacific Northwest Pear Orchards Managed With Long-Term Mating Disruption For Cydia Pomonella (Lepidoptera: Tortricidae), Kaushalya G. Amarasekare, Peter W. Shearer

Agricultural and Environmental Sciences Faculty Research

This study focused on conservation biological control of pear psylla, Cacopsylla pyricola, in the Pacific Northwest, USA. We hypothesized that insecticides applied against the primary insect pest, codling moth Cydia pomonella, negatively impact natural enemies of pear psylla, thus causing outbreaks of this secondary pest. Hence, the objective of this study was to understand how codling moth management influences the abundance of pear psylla and its natural enemy complex in pear orchards managed under long-term codling moth mating disruption programs. We conducted this study within a pear orchard that had previously been under seasonal mating disruption for codling moth for ...


Economies Of Scale In Integrated Pest Management In Vegetable And Fruit Production, Franklin Quarcoo, Conrad Bonsi, David Nii O. Tackie, Walter A. Hill, Gertrude Wall, George Hunter Sep 2017

Economies Of Scale In Integrated Pest Management In Vegetable And Fruit Production, Franklin Quarcoo, Conrad Bonsi, David Nii O. Tackie, Walter A. Hill, Gertrude Wall, George Hunter

Professional Agricultural Workers Journal

Abstract

Pest management is achieved directly using a variety of tools, including pesticides, and indirectly through a number of agronomic/cultural practices such as irrigation and fertilizer application; collectively these practices function to positively effect general plant health. Healthier plants are more resistant to or tolerant of pests. This study explores the scale differences that impact the pest management significance and suitability of certain agronomic practices. Scale differences were discussed using literature-based information, direct field observations, and anecdotal information on the relative advantages of drip and sprinkler irrigation systems; organic and conventional cultivation of crops; crop rotation versus mono-cropping systems ...


Reciprocal Effect Of Parental Lines On The Physiological Potential And Seed Composition Of Corn Hybrid Seeds, Juliana F. Santos, Lynnette M. A. Dirk, A. Bruce Downie, Mauricio F. G. Sanches, Roberval D. Vieira Sep 2017

Reciprocal Effect Of Parental Lines On The Physiological Potential And Seed Composition Of Corn Hybrid Seeds, Juliana F. Santos, Lynnette M. A. Dirk, A. Bruce Downie, Mauricio F. G. Sanches, Roberval D. Vieira

Horticulture Faculty Publications

Obtaining corn hybrid seeds (Zea mays L.) with high vigour depends on the parental lines and the direction of the cross, and this relates to seed desiccation tolerance and composition. This research studied reciprocal crosses between pairs of proprietary, elite parent lines (L1 and L5; L2 and L4) producing hybrid seeds with different qualities attempting to correlate vigour with seed composition, focusing on storage proteins, starch and soluble sugar amounts. Four corn hybrid seed lots produced from reciprocal crosses were compared (HS 15 with HS 51, and HS 24 with HS 42) by assessing germination, vigour, and seedling emergence in ...


Summaries Of Arkansas Cotton Research 2016, Fred Bourland Sep 2017

Summaries Of Arkansas Cotton Research 2016, Fred Bourland

Arkansas Agricultural Experiment Station Research Series

No abstract provided.


Identity Behind Glass: The Second Gore Place Greenhouse, Sean P. Romo Aug 2017

Identity Behind Glass: The Second Gore Place Greenhouse, Sean P. Romo

Graduate Masters Theses

This thesis examines the second greenhouse at Gore Place, a historic country estate in Waltham, Massachusetts. Gore Place was owned by and named for Christopher and Rebecca Gore, members of the 18th- and 19th-century political and economic elite in New England. The greenhouse was constructed in 1806, and excavation at the site took place in 2004, 2008, and 2012. The latter two projects were data recovery excavations, which exposed portions of the greenhouse’s foundations and interior, as well as several features in the yard surrounding the building. Historic greenhouses were prestigious structures, financially accessible only to institutions, governments, and ...


Notes On Some Of The Newer Vegetables, A. T. Erwin, E. S. Haber Aug 2017

Notes On Some Of The Newer Vegetables, A. T. Erwin, E. S. Haber

Bulletin

In presenting the following report on some of the newer vegetables recently tested at the Iowa Agricultural Experiment Station, no attempt is made to embrace all the new varieties or possible synonyms offered in the American seed trade. In cases where the results were so distinctly negative as to indicate that the variety was unsuited to the soil and climatic condition of central Iowa, it was omitted from the list.

The fact that a variety may be of special value for one purpose, but possibly inferior for another, should be borne in mind. The Ohio Canner beet is admirably adapted ...


Improving Wildflower Longevity In Roadside Seeding Areas, Walter Schacht, Jonathan M. Soper, Carol Wienhold Aug 2017

Improving Wildflower Longevity In Roadside Seeding Areas, Walter Schacht, Jonathan M. Soper, Carol Wienhold

Nebraska Department of Transportation Research Reports

Re-vegetation efforts on bare roadsides of newly-constructed highways are primarily focused on the stabilization of soil to reduce rates of erosion. The Nebraska Department of Transportation (NDOT) seeds roadsides with a diverse mixture of grasses and wildflowers for site stabilization as well as to enhance the visual quality of roadsides. Although grasses dominate roadside plantings in terms of cover and density, wildflowers are largely responsible for the visual enhancement of recently-seeded roadsides. In addition to the visual component, wildflowers provide essential ecological functions on roadsides. Wildflowers improve water and nutrient cycling in the compacted roadside soils by increasing water infiltration ...


Control Of Glyphosate-Resistant Common Ragweed (Ambrosia Artemisiifolia L.) In Glufosinate-Resistant Soybean [Glycine Max (L.) Merr], Ethann R. Barnes, Stevan Z. Knezevic, Peter H. Sikkema, John L. Lindquist, Amit J. Jhala Aug 2017

Control Of Glyphosate-Resistant Common Ragweed (Ambrosia Artemisiifolia L.) In Glufosinate-Resistant Soybean [Glycine Max (L.) Merr], Ethann R. Barnes, Stevan Z. Knezevic, Peter H. Sikkema, John L. Lindquist, Amit J. Jhala

Agronomy & Horticulture -- Faculty Publications

Common ragweed emerges early in the season in Nebraska, USA and is competitive with soybean; therefore, preplant herbicides are important for effective control. Glyphosate has been used as a preplant control option; however, confirmation of glyphosate-resistant (GR) common ragweed in Nebraska necessitates evaluating other herbicide options. The objectives of this study were to (1) evaluate the efficacy of preplant (PP) herbicides followed by (fb) glufosinate alone or in tank-mixture with imazethapyr, acetochlor, or S-metolachlor applied post-emergence (POST) for control of GR common ragweed in glufosinate-resistant soybean; (2) their effect on common ragweed density, biomass, and soybean yield; and (3) the ...


Irrigation For Vegetable Crops In Iowa, A. T. Erwin, E. S. Haber Aug 2017

Irrigation For Vegetable Crops In Iowa, A. T. Erwin, E. S. Haber

Bulletin

Does it pay to irrigate vegetable crops in Iowa?

What does it cost to irrigate? and under what conditions are these costs, plus a profit, returned to the vegetable grower?

No complete answer to these questions can be given, because of the widely varying conditions involved—differences of rainfall, of crops, of costs, of soil, of topography. But considerable light is thrown on them by experiments which the Vegetable Crops Subsection of the Iowa Agricultural Experiment Station has conducted during several years at Ames and on “Muscatine Island.’’


The Peppers, A. T. Erwin Aug 2017

The Peppers, A. T. Erwin

Bulletin

Peppers are native plants of tropical America, one of the few vegetables which still abound in the wild state. The earliest mention of them was in a report of Columbus’ first voyage.

The garden peppers are regarded as dwarf, early maturing forms of Capsicum frutescens. They are either annuals or perennials, according to climatic conditions.

The peppers are both self and cross-fertilized.

The collection of peppers grown in securing the data for this bulletin, included over 200 varieties, a large proportion of which were synonyms, secured from the American and European seed trade.


Applying Biodiversity And Ecosystem Function Theory To Turfgrass Management, Grant L. Thompson, Jenny Kao-Kniffin Aug 2017

Applying Biodiversity And Ecosystem Function Theory To Turfgrass Management, Grant L. Thompson, Jenny Kao-Kniffin

Grant Thompson

In the United States, there is a growing need for turfgrass management practices that protect community and environmental health. The proportion of the developed landscape in the United States covered by turfgrass is significant and, at present, covers at least 1.9% of the total land area and comprises 60% in parts of the country. As urbanization progresses, there is a critical need to re-examine turf management practices that reduce reliance on pesticide and fertilizer inputs while contributing additional beneficial ecosystem services. In this review, we discuss the functional role of turfgrass in urban ecosystems. We identify key urban ecosystem ...


Gladiolus Varieties In Floriculture Trial Gardens At Iowa State College, E. C. Volz, D. C. Fairburn Aug 2017

Gladiolus Varieties In Floriculture Trial Gardens At Iowa State College, E. C. Volz, D. C. Fairburn

Bulletin

One of the few gladiolus trial gardens in the United States is located at Ames, Iowa. This project was established in 1929 by the Iowa Gladiolus Society and the Department of Horticulture at Iowa State College. It has enjoyed the active cooperation of gladiolus breeders and commercial growers. The purpose of this garden is to make a comparative study of new and important varieties of gladioli to determine their commercial value and general adaptability. The value of this trial garden from a demonstration point of view alone can hardly be overestimated. Thousands of plant lovers visit the garden annually to ...


The Effect Of Various Containers On The Growth Of Vegetable Plants, E. S. Haber Aug 2017

The Effect Of Various Containers On The Growth Of Vegetable Plants, E. S. Haber

Bulletin

The experiments indicate that clay pots are superior, as a general rule, to composition pots, paper bands or flats as a growing medium for vegetable plants. If the plants in these substitute containers, however, are watered, about every week or 10 days with a solution of nitrate of soda, sulfate of ammonia or any other nitrogenous fertilizer at the rate of 1 ounce to 1 gallon of water, plants equal to those produced in clay pots are possible. A few species may do as well without nitrates; cabbage plants grown in peat pots were slightly better than those in clay ...


Pinching And Spacing Effects On Cut Sunflower (Helianthus Annuus) Production In East Texas, Rebecca B. Burnett Aug 2017

Pinching And Spacing Effects On Cut Sunflower (Helianthus Annuus) Production In East Texas, Rebecca B. Burnett

Electronic Theses and Dissertations

Three experiments evaluated pinching and spacing on Helianthus annuus in East Texas to determine their effects on growth and development. Experiment 1 was designed to determine the effects of pinching nodes 1, 2, 3, or 4 on ‘Pro Cut Gold’ sunflowers. Results from experiment 1 showed non-pinched plants produced marketable stem lengths and flower sizes, while pinched plants’ stem length, stem diameter, flower diameter, and disk diameter decreased compared to the non-pinched plants. The objective for experiment 2 was to evaluate pinching and spacing treatments on ‘Pro Cut Gold’ sunflowers. All spacings for non-pinched plants in experiment 2 produced marketable ...