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Dissertations / Theses on the topic 'Hydroponics'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Földhazy, Erik. "Smart Hydroponics : Conceptual Design of Hydroponic Plant System for Home Environment." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67827.

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Hydroponics is a method of cultivating plants without the use of soil. Soil acts as a growth medium which gives plants stability, provides nutrients and allows roots to be kept wet without drowning. In hydroponics the soil’s functions are replaced by synthesized methods. Stability comes from a substrate (i.e. LECA, rockwool perlite).The 16 essential nutrients are solved in water which are distributed to plants’ roots by different techniques. To generate photosynthesis natural light is replaced by artificial light, especially red light in the proximity of 660 nm. Hydroponics has been used as a
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2

Novotný, Tomáš. "Design domácího systému pro hydroponické pěstování rostlin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-231032.

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Research in the field of hydroponics from the second half of 20th century and 21st century described how the components of hydroponic systems are related to each other and established a basis for construction and operation of complex and reliable systems of hydroponic agriculture. These systems are predominantly constructed as means for mass production in agriculture or are built by individuals to be used in their garden or greenhouse. The role of design in production of these devices is rather limited. The goal of this work is to introduce hydroponics as a complex system of many interconnecte
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3

Lidholm, Viktor, and Pelle Lund. "Sensorelektronik för hydroponisk odling." Thesis, Linköpings universitet, Elektroniska Kretsar och System, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-166952.

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Projektet gick ut på att skapa ett system för att automatisera en hydroponisk odling, ta fram vilka storheter som är intressanta att mäta och sedan skapa elektronik för det. Det var snabbt tydligt att det är elektrisk konduktivitet (EC), pH och temperatur som är intressant att mäta. EC är ett estimat över näringsinnehållet i vattnet, pH i vattnet måste vara i rätt nivå för att växterna ska kunna ta upp näringen och temperaturen måste vara inom rätt område för att växterna ska växa. Sensorerna som valdes fungerar väldigt olika och därför skapades olika kretsar för vardera sensor. EC och tempera
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4

Al-Harbi, Abdulaziz R. A. K. "Salinity and the growth of cucumber in hydroponics." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46641.

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5

Littlefield, Joanne. "Controlled Environment Agriculture: Greenhouses Feature High-Tech Hydroponics." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/622255.

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6

Prieto, Yanes Andrés. "Development of an IoT Board for Indoor Hydroponics." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280305.

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This thesis has been written for Hollbium AB, a Stockholm based Startup that provides a system called the Loop that grows edible plants in office spaces. This degree project reviews literature on hydroponics systems and design formanufacturing (DFM). The reviewed material alongside identified needs from the stakeholders serve as input for the design of an electronics board that controls The Loop.<br>Denna masteruppsats har skrivits för Hollbium AB:s räkning, ett Stockholmsbaserat startupföretag som levererar ett system kallat The Loop vars syfte är att odla ätbara växter i kontorsmiljö. Det hä
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7

Lundin, Karl, and Oscar Olli. "Automated hydroponics greenhouse : Regulation of pH and nutrients." Thesis, KTH, Maskinkonstruktion (Inst.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226662.

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The purpose of this project is to create a fully automatedgreenhouse that can produce year-round crops, using sensorsand actuators. Temperature in both water and air,relative humidity, water level, nutrient level and pH are allmeasured with different sensors. Though only water level,pH and nutrients will be regulated. The greenhouse will berelying on a hydroponic growing technique, meaning thatthe growing is soil-less and will be done in water. Thismakes measuring and controlling said levels easier and alsominimizes water waste and makes for a more environmentalsystem. The main focus of this p
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8

Martin, Colin. "Towards a Hydroponic Architecture." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1554119967725464.

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9

Walker, Sara. "The multiplication, rooting and acclimatization of micropropagated roses." Thesis, University of Hertfordshire, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358566.

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10

com, nora_oyama@hotmail, and Noraisha Oyama. "Hydroponics system for wastewater treatment and reuse in horticulture." Murdoch University, 2008. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20091117.125236.

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As human population increases, the need for water increases in domestic, agricultural, industrial and urban sectors. Wastewater reuse after treatment is gaining acceptance world wide, as availability of fresh water sources decreases. However, it is also important to point out social and cultural differences that still exist in different pars of the world including those where reuse of wastewater for food production or any domestic use is not yet acceptable. The major concerns with effluent reuse are primarily its impact on human health and environmental risk. As a result, effluent reuse should
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11

Oyama, Noraisha. "Hydroponics system for wastewater treatment and reuse in horticulture." Thesis, Oyama, Noraisha (2008) Hydroponics system for wastewater treatment and reuse in horticulture. PhD thesis, Murdoch University, 2008. https://researchrepository.murdoch.edu.au/id/eprint/1679/.

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As human population increases, the need for water increases in domestic, agricultural, industrial and urban sectors. Wastewater reuse after treatment is gaining acceptance world wide, as availability of fresh water sources decreases. However, it is also important to point out social and cultural differences that still exist in different pars of the world including those where reuse of wastewater for food production or any domestic use is not yet acceptable. The major concerns with effluent reuse are primarily its impact on human health and environmental risk. As a result, effluent reuse should
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12

Oyama, Noraisha. "Hydroponics system for wastewater treatment and reuse in horticulture." Oyama, Noraisha (2008) Hydroponics system for wastewater treatment and reuse in horticulture. PhD thesis, Murdoch University, 2008. http://researchrepository.murdoch.edu.au/1679/.

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As human population increases, the need for water increases in domestic, agricultural, industrial and urban sectors. Wastewater reuse after treatment is gaining acceptance world wide, as availability of fresh water sources decreases. However, it is also important to point out social and cultural differences that still exist in different pars of the world including those where reuse of wastewater for food production or any domestic use is not yet acceptable. The major concerns with effluent reuse are primarily its impact on human health and environmental risk. As a result, effluent reuse should
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13

Wong, Ka-fu Katherine. "Roundabout transformation 3D park connector /." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B31987321.

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14

Qengwa, Viwe Keith. "Social perspectives on hydroponics production in the Nelson Mandela Metro Municipality." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/5246.

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Despite millions of Rands being disbursed to the three hydroponic projects in the Nelson Mandela Bay Municipality by Provincial Departments, Development Agencies and NGOs, relatively little is known about the impact of these projects. There is too little evaluative research on the effectiveness of such development projects. Questions arose as to what made these projects fail and what was required for sustainability over their intended life-spans. Evaluations assess a project’s ability to be sustained by examining different aspects of sustainability, including technical soundness, skills transf
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15

Cork, Justin Trevor James. "An integrated farm management information system for the South African hydroponic industry." Thesis, Nelson Mandela Metropolitan University, 2016. http://hdl.handle.net/10948/5500.

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The world’s population is growing at an average of 1.2 percent per annum and forecasts see the global population reaching 9.6 billion by 2050. This places great demands on the sustained production capacity of agricultural organisations to meet the desperate need for nutrition. This problem will continue to persist if production methods do not evolve to improve production and quality. Hydroponics and Controlled Environment Agriculture (CEA) was first seen in Rome during the 1st Century. Then sixteen Centuries later Greenhouses were developed in France and England as experimental hydroponics for
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16

Siraj-Ali, Mahmoud Saleh. "Influence of nutrient solution pH on the availability and uptake of plant nutrients and growth of Chrysanthemum morifolium 'Bright Golden Anne' in hydroponic culture /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487264603216396.

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17

Vrabec, Miroslav. "Řídící jednotka pro aeroponický pěstební systém." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219914.

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This thesis deals with the history of a method of plants cultivation without original substrate. The method is hydroponics and its subsequent development is called aeroponics. This work outlines the design of the whole aeroponic system including a control unit. The control unit has been designed to control the injection of nutrient solution, which is essential to the life of plants.Further, the control unit performs the control of lighting period, temperature, air flow and also regulation of nutrient solution pH. The control unit also keeps records of all data necessary for the monitoring proc
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18

Mashego, Ditshwanelo Cynthia. "The production of vegetable crops under protection for small-scale farming situations." Diss., University of Pretoria, 2001. http://hdl.handle.net/2263/26198.

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Experiments were conducted with tomato under shade netting and with lettuce in a vertical hydroponic system at the Hatfield Experimental Farm, University of Pretoria. The objectives of the study were: 1. To evaluate the effect of different types of shade netting on tomato production 2. To develop a vertical hydroponic system for lettuce production which would be suitable for use by small-scale farmers. In the tomato trial the highest number of fruit per plant (47) was produced under 12% white shade and 40% black shade nets, and the lowest fruit number (35) was produced under 30% black net. The
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19

Micó, Reche Mª del Mar. "Photo-Fenton and Slow Sand Filtration coupling for hydroponics water reuse." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/128571.

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The collaboration between the University of Barcelona and Acciona Agua was focused on optimizing greenhouses hydric resources. The functionality of a combined treatment had to be assessed, when applied to the discard stream of a recycling system of the Advanced Greenhouse leachates. The coupling consisted on an Advanced Oxidation Processes (AOP), photo-Fenton, based on hydroxyl radical oxidative potential, produced by the interaction between Fe2+ and H2O2, and a slow sand filtration column acting as a bioreactor. The recycling system will require the synergy of chemical and biological processe
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20

Norström, Anna. "Treatment of domestic wastewater using microbiological processes and hydroponics in Sweden." Doctoral thesis, KTH, School of Biotechnology (BIO), 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183.

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<p>Conventional end-of-pipe solutions for wastewater treatment have been criticized from a sustainable view-point, in particular regarding recycling of nutrients. The integration of hydroponic cultivation into a wastewater treatment system has been proposed as an ecological alternative, where nutrients can be removed from the wastewater through plant uptake; however, cultivation of plants in a temperate climate, such as Sweden, implies that additional energy is needed during the colder and darker period. Thus, treatment capacity, additional energy usage and potential value of products are impo
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Norström, Anna. "Treatment of domestic wastewater using microbiological processes and hydroponics in Sweden /." Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183.

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22

González-Lerma, Victoria Elizabeth. "Hydroponic production of selected flower and herb crops in red lava rock." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10597.

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Thesis (M.S.)--West Virginia University, 2009.<br>Title from document title page. Document formatted into pages; contains xiii, 178 p. : ill. (some col.), maps (some col.). Includes abstract. Includes bibliographical references (p. 112-115).
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23

Ndame, Loic Andre Stephane. "Wireless ICT monitoring for hydroponic agriculture." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/3605.

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It is becoming increasingly evident that agriculture is playing a pivotal role in the socio-economic development of South Africa. The agricultural sector is important because it contributes approximately 2% to the gross domestic product of the country. However, many factors impact on the sustainability of traditional agriculture in South Africa. Unpredictable climatic conditions, land degradation and a lack of information and awareness of innovative farming solutions are among the factors plaguing the South African agricultural landscape. Various farming techniques have been looked at in order
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24

McGinley, Susan. "Market Grade Fish with a Side of Basil: Sustainable Aquaculture and Hydroponics." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2007. http://hdl.handle.net/10150/622136.

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25

Dumitrescu, Vlad Andrei. "Comparative analysis of biogas slurry and urine as sustainable nutrient sources for hydroponic vertical farming." Thesis, Linköpings universitet, Tema vatten i natur och samhälle, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96368.

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Sustainable alternatives to using mined nutrients in agriculture must be found in order to limit environmental impacts such as eutrophication, habitat destruction and greenhouse gas emis-sions. Biogas slurry and urine recycled to hydroponic food production (a type of soilless agri-culture) have the potential of providing inorganic nitrogen and phosphorus, the main essential nutrients required for plant growth. A Life Cycle Inventory Assessment (LCI) methodology has been used to compare the systems of producing artificial fertilizer, biogas slurry and urine based nutrient solutions for the grow
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26

Bedasie, Simon. "The effect of intermittent flow on the growth and development of NFT lettuce /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65346.

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27

Allum, Stephen. "Evaluation of the use of chlorophyll fluorescence in the detection of metal-induced stress in plants." Thesis, Staffordshire University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341404.

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28

Van, Zyl Sonet. "Open hydroponic systems in table grape production : a case study." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/49775.

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Thesis (MScAgric)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: An open air hydroponic production system (OHS) is based on classic hydroponic principles, with the difference that it lacks climatological control because the plants are not produced in greenhouses and are cultivated in the outside environment. In these systems the plant is provided with all the essential nutrients through the irrigation system, which is scheduled according to accurate measurements of the available soil water, in three to seven pulses a day. The rationale is that, by delivering nutrients each day,
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29

Francis, Jesse M. "THE EFFECTS OF HYDROPONIC WHEAT FODDER ON FECAL METABOLITES IN EQUINES." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2096.

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The use of hydroponic feeding systems for horses has gained in popularity during recent years. Typically, this feeding system allows for a more efficient use of the whole plant, including the shoot, root, and seed remnants rather than traditional grazing in which only the shoot of the plant is consumed. Vertical systems have practical uses in largely developed areas where traditional forage sources are limited, in arid countries or in areas with severe droughts where forage growth is minimal. Though there is some research on fodder utilization in production animals, there are currently no publ
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Ayeni, Olutoyosi Olaide. "Growth responses within the Genus Cyperus exposed to aluminium and iron in hydroponics." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2430.

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Thesis (DTech (Environmental Health))--Cape Peninsula University of Technology, 2016.<br>Generally, aluminium (Al) is required as a micronutrient by plants. The metabolism of Al within the plant can exert a number of effects within the plant. These include: interfering with cell division in both root tips and lateral roots, increasing cell wall rigidity, maintaining the correct cellular redox state, as well as the various other physiological and growth responses. Al is one of the most abundant elements in the earth’s crust and becomes toxic in many plants when the concentration is greater than
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31

Singh, Sahdev. "A computer simulation model for wastewater management in an integrated (fish production-hydroponics) system." Diss., Virginia Tech, 1996. http://hdl.handle.net/10919/37764.

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Sakuntala, Saijai. "Analysis and application of microbial consortia involved in ammonification and nitrification for organic hydroponics." Kyoto University, 2016. http://hdl.handle.net/2433/217184.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第20009号<br>農博第2193号<br>新制||農||1045(附属図書館)<br>学位論文||H28||N5018(農学部図書室)<br>33105<br>京都大学大学院農学研究科応用生命科学専攻<br>(主査)教授 小川 順, 教授 阪井 康能, 教授 栗原 達夫<br>学位規則第4条第1項該当
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Matanzima, Yonela. "Quantitative and qualitative optimization of antimicrobial bioactive constituents of Helichrysum cymosum using hydroponics technology." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/849.

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Thesis submitted in fulfilment of the requirements for the degree Master of Technology: Horticulture in the Faculty of Applied Sciences at the Cape Peninsula University of Technology<br>The high demand for medicinal plants has favoured over-exploitation of wild plants. The search for alternative and sustainable methods of medicinal plant cultivation is imperative and desirable. Biotechnological approaches particularly hydroponic technology has the potential for large scale plant cultivation and production of secondary metabolites. The current study aims at optimizing the production of a
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Muhlestein, Dawn J. "Effects of High Ammonium/Nitrate Ratios on Nitrification and Growth of Wheat in Hydroponics." DigitalCommons@USU, 2001. https://digitalcommons.usu.edu/etd/6708.

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Nitrogen is the only plant nutrient taken up as both a cation (NH4 +) and anion (NO3-). Nitrate is considered the "safe" form of N and NH/ is generally thought to be toxic, especially at high levels. High NH/ /NO3- ratios are thought to be toxic because they result in a rhizosphere pH low enough to damage root membranes, induced cation deficiencies, and build-up of NH3 caused by delayed NH/ assimilation. These factors can be minimized in hydroponic culture. The objective of these studies was to quantify the effects of high NH4 + IN 0 3- ratios on nitrification and growth of wheat in hydroponic
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Storey, Nathaniel R. "An aquaponic system component comparisons and applications /." Laramie, Wyo. : University of Wyoming, 2009. http://proquest.umi.com/pqdweb?did=1939351881&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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36

Holliman, James Bret Adrian John. "An economic analysis of integrating hydroponic tomato production into an indoor recirculating aquacultural production system." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Fall/Theses/HOLLIMAN_JAMES_4.pdf.

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37

Sultan, Youneskhan 1957. "Rhythm of zoospore production of pythium on lettuce cultured hydroponically." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276687.

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Zoospore production of Pythium dissotocum Drechs. in the nutrient solution of hydroponically-grown lettuce, in the greenhouse, was shown to be cyclic. The number of zoospores detected in the nutrient solution was lowest around noontime, (11:00-14:00 hr) and highest around 20:00 hr. Growth chamber studies were conducted to determine the effect of different light periods on zoospore production. Under continuous light or continuous darkness, the population of zoospores in the nutrient solution decreased. But under 12 hours light, and 12 hours darkness or two periods of light each for 3 hours, zoo
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Licamele, Jason David. "Biomass Production and Nutrient Dynamics in an Aquaponics System." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/193835.

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The goal of this study was to prove that aquaponic systems can produce lettuce of equal growth and quality compared to hydroponic lettuce production and to determine the stocking density of fish required for plant growth. Aquaponics is the integration of recirculating aquaculture and hydroponic plant production. The project had four objectives. The first objective was to determine the biomass of fish required for plant growth to develop a fish to plant density ratio. The second objective was to compare lettuce grown with aquaponic water and a hydroponic solution under the same environmental co
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Lefever, Kerwin. "Effects of pH and phosphorus concentrations on the cultivation of Salvia chamelaeagnea grown in hydroponics." Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/837.

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Thesis submitted in fulfilment of the requirements for the degree Master of Technology: Horticulture in the Faculty of Applied Sciences at the Cape Peninsula University of Technology 2013<br>This study evaluated the effects of different pH levels and supplementary phosphorous concentrations on Salvia chamelaeagnea grown in hydroponics. The treatments consisted of 12 treatments of 4 differing nutrient solutions offering: low concentration of supplementary P (control), balanced concentration of supplementary P, moderate concentration of supplementary P and a high concentration of supplementary P
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Saif, Salman Mohammed 1958. "EFFECT OF SALINITY ON THE TOMATO PLANTS GROWN IN A HYDROPONIC SYSTEM." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/277070.

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Boshoff, Jane. "Biological control of Pythium wilt and root rot in hydroponically grown lettuce." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-02272007-163651/.

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Wees, David. "The effects of carbon dioxide enrichment and aeration of hydroponic nutrient solutions on the growth and yield of lettuce /." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66169.

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43

Rossouw, Alex. "The marketability of small scale hydroponic systems for the horticultural industry in South Africa." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2539.

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Thesis (MTech (Horticultural Science))--Cape Peninsula University of Technology, 2016.<br>Hydroponics, i.e. plant cultivation in mineral-rich water is a synergy between plant, human, and machine. For decades the hydroponic garden has been offered on horticultural markets, and was repeatedly innovated to better meet consumer horticultural needs. Currently, platform convergences with electronic control systems can possibly enable more efficient products for direct consumer hydroponic cultivation. This means that, like many appliances in the home; hydroponic plant cultivation can become somewhat
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Martineau, Vincent. "Comparison of light emitting diode and high pressure sodium light for hydroponics growth of Boston lettuce." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104605.

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Sustained developments in light emitting diode (LED) technology have brought their irradiance to a suitable level for being considered as a replacement to traditional high pressure sodium (HPS) lamps in hydroponics growth environments. LED lamps are anticipated to replace HPS lamps in most applications due to their reduced electricity consumption, improved quality of light and the possibility for customization of the light spectrum for increased yields. While equipment costs are still high, as is the case with most new technologies, greenhouse growers across the world stand to substantially
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Summerhays, Jeffrey Sean Christian. "Effectiveness of Phosphorus Fertilizers in Hydroponics and Glasshouse Settings with Moderate and High Organic Matter Soils." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3754.

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Phosphorus (P) is poorly soluble in most soils and, thus, has poor plant uptake efficiency. AVAIL® and Carbond P (CBP) are new fertilizer products shown to increase P use efficiency (PUE) and increase crop yields when grown in P limiting soils. Carbond P has specifically been seen to increases P uptake and crop yields in soils low in P, although effectiveness in regards to soil organic matter is unknown. The objectives of these studies were to determine if the mode of action for these products is related to physiological response, to determine if Carbond P is toxic to plant roots when in dire
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De, Villiers Chris Johan. "The effect of Phosphorus on the growth, plant mineral content and essential oil composition of Buchu (Agathosma betulina)." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019.1/1867.

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Dayananda, Hithaishi. "One Square Meter Yield: A Hydroponic System Design." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446249.

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Vertical hydroponic farming is a developing sector that has the potential to mitigate the adverse effects of conventional farming while also meeting the demands of rapidly urbanizing populations. The global food system is responsible for up to 30% of anthropogenic GHG emissions, with primary production accounting for the majority of these emissions. Hydroponic farming is a type of crop production in which the plants grow without the use of soil. It is mainly done indoors. Hydroponic production has various advantages for the food system, including water efficiency, space efficiency, year-round
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48

Butcher, Joshua David. "A comparative study of oxygenation techniques in the hydroponic cultivation of Pelargonium Tomentosum." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2427.

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Thesis (MTech (Horticultural Science))--Cape Peninsula University of Technology, 2016.<br>This aim of this study was to investigate the viability of growing P. tomentosum in deep water culture (DWC) hydroponics and to assess the effects of various methods of oxygenating the nutrient solution with regards to growth, development and chlorophyll responses. The experiment was conducted over a period of 74 days. In chapter 3, 16 different methods of oxygenation were applied to 9 replicates. The control had passive aeration. The treatments were made up of air-pumps, vortex oxygenators and the applic
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49

Haghighi, Maryam, Atena Sheibanirad, and Mohammad Pessarakli. "Effects Of Selenium as a Beneficial Element on Growth and Photosynthetic Attributes of Greenhouse Cucumber." Taylor & Francis, 2015. http://hdl.handle.net/10150/615120.

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Selenium (Se) is an essential element for human and livestock with antioxidant and anticancer characteristics. Although Se is not an essential element for plants, it has been reported that it can improve plant growth. This experiment was conducted at the Isfahan University of Technology in winter 2010. The experiment was factorial based on a completely randomized design (CRD) with 4 replications. Se was added to nutrient solution in 4 concentrations 2, 4, and 6 mg/l sodium selenite (Na2SeO3). Root volume, fresh and dry weights of shoots and roots, number and weight of fruits, chlorophyll conte
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50

Kacheris, William, and William Kacheris. "A Novel Approach for Calculating the Feasibility of Urban Agriculture using an Enhanced Hydroponic System." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/620674.

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With a continued worldwide trend in population shift from rural to urban areas predicted to increase, new approaches to agricultural production must be considered and implemented. Little academic interest has been applied to determining economically viable urban agriculture crop production sites for business investment. A feasibility model to aid investors in selecting appropriate sites for the development of urban agriculture food production within population centers was created. Lettuce crop trials were performed from August 2015 to December 2015 at the University of Arizona Controlled Envir
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