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Dissertations / Theses on the topic 'Fertilizer value'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Sturgeon, Laura Wood C. W. "Fertilizer value of densified broiler litter." Auburn, Ala, 2008. http://hdl.handle.net/10415/1410.

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2

Van, der Merwe Petrus. "Phosphorus phyto-availability and fertilizer value of petrochemical and municipal wastewater sludges." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/46060.

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A growing population, urbanization and an increase in the number of industries is causing an increase in sewage sludge (SS) that needs to be either beneficially used or disposed of. Application of SS to agricultural lands is a well-known practice but the plant available phosphate and phosphate fertilizer value of SS has been of concern. This is especially due to the wide variety of soils that SS is applied to and the different phosphate removal processes that sewage waste water undergoes at the water care works and the source used to produce SS. Phosphate phyto-availability and phospha

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3

Massicotte, Luc. "Assessment of the agricultural value of sugar refinery by-products." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23410.

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The sugar refinery process used by Lantic Sugar Ltd generates three by-products having characteristics that give them potential as soil amendments or fertilizers, particularly as a phosphorous and calcium source. Laboratory and a field trials were conducted in order to examine the changes in agronomic properties of soil produced by the application of these residues.<br>During the laboratory experiment, the by-products examined were spend bone char (SBC), filter-press mud (FPM), clarification scum (SCU) and a compost (COM) produced using FPM and SCU, where as in a field experiment, COM, SBC and

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4

Mupondi, Lushian Tapiwa. "The effects of goat kraal manure, sewage sludge and effective microorganisms on the composting of pine bark and the nutritional value of the composts." Thesis, University of Fort Hare, 2005. http://hdl.handle.net/10353/d1001008.

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5

Mpabanga, Nkosi. "The effect of phosphorus fertilizer application on growth, biomass and nutritive value of Pigeon pea (Cajanus cajan (L.) Millsp.) varieties in Alice, South Africa." Thesis, University of Fort Hare, 2017. http://hdl.handle.net/10353/6180.

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Low soil fertility has been identified to be among the major causes of low pasture quantity and quality. Scarcity of high quality forage mainly during the dry season threatens animal productivity in some areas of South Africa, thus the need for identifying livestock feed alternatives. Pigeon pea is a woody legume that has continually been an important shrub in agroforestry and can provide protein-rich livestock feed during times of shortage. Soil fertility to support the production of pigeon pea can be enhanced by application of fertilisers. Therefore, this study was carried out firstly, to de

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6

Nordin, Andreas. "Heavy metal removal from sewage sludge by pyrolysis treatment." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-8807.

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Sewage sludge is the product from wastewater treatment that mostly is considered as a waste material. However, it contains several nutrients, especially phosphorus, potassium and nitrogen which are excellent fertilizers. The downside is the harmful content it also carries with pathogens, heavy metals and a variety of organic pollutants that in many cases have unknown effects on the ecosystem. A possible solution to this problem could be to pyrolyse the sewage sludge and by that decrease the levels of heavy metals and also render both pathogens and organic pollutants harmless. In this thesis pr

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7

Silva, Marcio Silveira da. "Efeitos de esterco bovino em atributos químicos e físicos do solo, produtividade de milho e créditos de nitrogênio." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/154592.

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Submitted by Marcio Silveira da Silva (marciode@hotmail.com) on 2018-07-26T10:55:51Z No. of bitstreams: 1 Tese-Marcio Silveira da Silva- Ciência do Solo.pdf: 2318239 bytes, checksum: 3034b4bf8c42da6d87fc4bc59a713b5a (MD5)<br>Approved for entry into archive by Karina Gimenes Fernandes null (karinagi@fcav.unesp.br) on 2018-07-26T11:24:31Z (GMT) No. of bitstreams: 1 silva_ms_dr_jabo.pdf: 2318239 bytes, checksum: 3034b4bf8c42da6d87fc4bc59a713b5a (MD5)<br>Made available in DSpace on 2018-07-26T11:24:31Z (GMT). No. of bitstreams: 1 silva_ms_dr_jabo.pdf: 2318239 bytes, checksum: 3034b4bf8c42da6d8

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8

Islam, Md Rafiqul. "Evaluation of oat straw for ruminants : effects of genotype, climate and agronomic factors on nutritive value and prediction of nutritive value." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363812.

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9

Balanco, Tannon Otto. "A continuous value proposition : waste created by food manufacturing companies and the conversion of bio-waste into biogas and fertiliser." Diss., University of Pretoria, 2015. http://hdl.handle.net/2263/52259.

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Sustainability has become a critical element in the way business strategies are designed. Many organisations have adopted best management practices and the corporate governance of modern companies have been aligned not only to look at profits but also to take into consideration the impacts that they have on people and on the planet. There has recently been a substantial acceptance towards renewable energy sources worldwide, however anaerobic digestion of bio-waste into bio-energy has been around for decades and has not seen the equivalent recognition in South Africa. The purpose of the researc

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10

Bertils, Elsa, and Herman Elvingson. "Utveckling av marknader för avfallsbaserade resurser : En fallstudie på återanvändning av komplexa avfallsströmmar ur ett värdekedjeperspektiv." Thesis, Linköpings universitet, Industriell miljöteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157430.

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Immense amounts of waste are generated daily by our society, and the management of these streams is a critical societal function. Part of this work is reusing and recycling materials with attractive properties, which is also an imperative step towards circular material flows. Although, the reuse of waste-based resources entails a conflict between efficient use of resources and minimal environmental toxicity, which hampers the reuse. The labeling of a resource as waste also makes using or trading the resource problematic, both regarding regulations, but also concerns from the society regarding

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11

Mupondi, Lushian Tapiwa. "Improving sanitization and fertiliser value of dairy manure and waste paper mixtures enriched with rock phosphate through combined thermophilic composting and vermicomposting." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/411.

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Thermophilic composting (TC) and vermicomposting (V) are the two most common methods used for biological stabilization of solid organic wastes. Both have their advantages and disadvantages but the proposed method of combining composting and vermicomposting (CV) borrows pertinent attributes from each of the two methods and combines them to enhance overall process and product qualities. Dairy manure and waste paper are two wastes produced in large quantities at the University of Fort Hare. The study was carried out to address the following specific objectives, to determine (i) the effectiveness

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12

FERREIRA, Erivaldo Alves. "Produtividade da videira itália no Vale Submédio do São Francisco sob adubação alternativa e coeficientes de demanda hídrica." Universidade Federal de Campina Grande, 2014. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/669.

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Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-05-14T19:37:32Z No. of bitstreams: 1 ERIVALDO ALVES FERREIRA - DISSERTAÇÃO PPGSA PROFISSIONAL 2014..pdf: 677272 bytes, checksum: c5d142ada24b2142e7d5406f5d757d92 (MD5)<br>Made available in DSpace on 2018-05-14T19:37:32Z (GMT). No. of bitstreams: 1 ERIVALDO ALVES FERREIRA - DISSERTAÇÃO PPGSA PROFISSIONAL 2014..pdf: 677272 bytes, checksum: c5d142ada24b2142e7d5406f5d757d92 (MD5) Previous issue date: 2014<br>A viticultura reveste-se de especial importância econômica e social no Submédio do Vale do São Francisco, à medida que en

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13

Daverede, Ines C. "Improving the fertilizer value of swine manure : in-depth study of nitrogen transformations in soils, corn nitrogen uptake, and swine diet manipulation to optimize manure as a resource for agriculture /." 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3242827.

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Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.<br>Source: Dissertation Abstracts International, Volume: 67-11, Section: B, page: 6119. Adviser: Robert G. Hoeft. Includes bibliographical references. Available on microfilm from Pro Quest Information and Learning.

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14

"Biomass production and nutrient cycling in short-rotation coppice willow (Salix spp.) bioenergy plantations in Saskatchewan, Canada." Thesis, 2013. http://hdl.handle.net/10388/ETD-2013-12-1322.

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Biomass energy is currently the largest renewable contributor to global energy supply and there is increasing demand for bioenergy feedstock. Consequently, the production of purpose-grown woody bioenergy crops, such as short rotation coppice (SRC) willow, is expected to proliferate. Although the economic and environmental benefits associated with SRC willow production are well documented, systematic assessments of nutrient cycling within these plantations are rare. The objective of this study was to examine biomass production and biogeochemical cycling of nitrogen (N), phosphorus (P), potassiu

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15

Dugmore, Trevor John. "The effect of nitrogen fertilization and stage of re-growth on the nutrititive value of kikuyu in the Midlands of KwaZulu-Natal." Thesis, 2011. http://hdl.handle.net/10413/8298.

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Kikuyu pasture was fertilized at low and high levels of nitrogen (N), namely 50 and 200 kg N/ha, after mowing and clearing the plots, to induce low and high levels of N in the herbage. The subsequent growth was harvested at 20-, 30- and 40-d re-growth. These treatments were conducted in spring, summer and autumn. Treatments included level of N, stage of re-growth and season as variables in digestion trials using sheep and voluntary feed intake (VFI) trials using long yearling heifers in pens equipped with Calan gates. Nitrogen fertilization level had no impact on herbage dry matter digestibili

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16

Bester, Lelanie. "Beneficiation of wastewater streams from gold mine process water systems with recovery of value-adding liquid waste products." Diss., 2012. http://hdl.handle.net/2263/29883.

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A strategy for beneficiation of wastewater streams from fissure and process water developed for a gold mine operation in the west of Johannesburg was tested for viability in a pilot study. The investigation was aimed at evaluating the compliance of the finally discharged effluent streams with the current Water Use Licence (WUL). The core of the water recovery process consisted of softening to remove divalent cationic species, followed by ion exchange processes employing Strong Acid Cationic (SAC) resins and Weak Acid Cationic (WAC) resins. An operational design limitation was that the crystala

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17

Rambau, Mashudu Daniel. "The effects of fertilization with bio-digester slurry and the inclusion of carbohydrate additives at ensiling on the nutritive value of Napier grass (pennisetum purpureum) silage." Diss., 2016. http://hdl.handle.net/11602/696.

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MSCAGR (Animal Science)<br>Department of Animal Science<br>The objective of the study was to determine the effects of fertilisation with bio-digester slurry and the inclusion of carbohydrate additives at ensiling on the fermentation characteristics, chemical composition, ruminal degradability, and in vitro digestibility of Napier grass silage. Napier grass planted at the School of Agriculture Experimental Farm, University of Venda in 5 m x 4 m plots replicated three times in a completely randomised design and was irrigated with either biodigester slurry or no bio-digester slurry (tap wate

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