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Relevant bibliographies by topics / Tropical soil fertility / Dissertations / Theses

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Dissertations / Theses on the topic 'Tropical soil fertility'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Shariff, Amir Husni Mohd. "Site fertility and carrying capacity in two Malaysian tropical forest reserves." Thesis, University of Aberdeen, 1990. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU024669.

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Ten two hectare forest plots were established on two distinct reserves, one mainly on volcanic deposits and the other on sedimentary and alluvial soils. These were investigated for their site carrying capacity and species diversity in relation to edaphic factors, using accumulated basal area as the growth indicator. A soil survey was conducted in each reserve to classify the soil types at the series level. Five two hectare sites each reflecting different soil types were chosen from each reserve. All trees of 10 cm dbh and over were enumerated on each soil type and identified to species level.

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2

Bomeisl, Lauren. "Residual Soil Phosphorus in Tropical Oxisols: An Opportunity to Enhance Fertilizer Use Efficiency?" ScholarWorks @ UVM, 2019. https://scholarworks.uvm.edu/graddis/1159.

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Phosphorus (P) is essential to life on Earth and often the limiting nutrient in agricultural systems. P fertilizer is thus an essential resource to maintain food security. In the last half century, agricultural intensification has led to an increase in P fertilizer consumption from 4.6 to 17.5 Tg of P/year to meet rising global food demand. Mineral P (i.e., phosphate rock) is a non-renewable resource in the context of the Anthropocene, and its price is vulnerable to global market fluctuations. Increased efficiency of P use on farms is considered the most effective strategy to conserve P. The s

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3

Armendariz-Yanez, Ivan Rene. "Indigenous fodder legume trees : their influence on soil fertility and animal production on tropical pastures of Yucatan, Mexico." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285231.

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4

Nogueirol, Roberta Corrêa. "Práticas de manejo e avaliação de extratores em solos da região tropical úmida." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-26032012-110343/.

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A área cultivada sob sistemas conservacionistas aumentou no Brasil nos últimos anos. Paralelamente, ocorreu incremento na demanda de conhecimento a respeito da variabilidade dos índices de fertilidade do solo utilizados nas recomendações de adubação e calagem. Esse assunto vem preocupando técnicos e pesquisadores envolvidos nas redes regionais de laboratórios de análises de solo e comissões de fertilidade do solo encarregadas da elaboração das recomendações de adubação. O acúmulo de matéria orgânica (MO) no solo pode afetar a eficiência dos extratores químicos por causar alterações físico-quím

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5

Bahr, Etienne. "Assessment of soil fertility change and sustainability of agroecological management in different land use systems of the southern Ecuadorian Andes." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-171071.

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The thesis was conducted to investigate soil fertility changes and assess the sustainability of agroecological management in different land-use systems of the southern Ecuadorian Andes using quantitative and qualitative methods. Ecuador still holds the highest deforestation rate of all Latin American countries which also has a large impact in the research area by forest conversion into agricultural land. Agricultural land-use systems in the research area are multifaceted due to heterogeneous biophysical and socio-economic conditions. To map this diversity, land-use systems were investigated in

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6

Teklay, Tesfay. "Organic inputs from agroforestry trees on farms for improving soil quality and crop productivity in Ethiopia /." Umeå : Dept. of Forest Ecology, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/2005122.pdf.

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7

Junior, Elizio Ferreira Frade. "Atributos químicos, microbiológicos e emissões de CO2, CH4 e N2O do solo em experimento de corte e queima controlada na Amazônia Ocidental." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-21032018-110158/.

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Nas últimas décadas as mudanças climáticas foram evidenciadas pelo aumento da temperatura global, diminuição dos estoques de carbono terrestres, associados ao aumento nas emissões de gases de efeito estufa (GEE). A floresta Amazônica é o maior bioma tropical do mundo e desenvolve serviços ambientais estratégicos no planeta. Entretanto, há mais de duas décadas que o desmatamento na Amazônia impulsiona as emissões globais de GEE, diminuindo o armazenamento de carbono do solo com alterações na dinâmica nas populações microbianas e nos ciclos biogeoquimicos pela mudança de uso da terra. O objetivo

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8

Pinto, Leonardo Henrique Teixeira. "Restoration of plant diversity and ecosystem functioning: effects of species richness, phylogenetic distance, functional diversity and invasive plants." PROGRAMA DE P?S-GRADUA??O EM ECOLOGIA, 2017. https://repositorio.ufrn.br/jspui/handle/123456789/23964.

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9

Seck, Mamadou Amadou. "Le compostage des coques d'arachide : Une technique permettant d'améliorer la qualité des sols saheliens." Nancy 1, 1987. http://www.theses.fr/1987NAN10035.

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L'effet du compostage selon différentes techniques a été vérifié par des analyses physiques et chimiques, mais également en suivant la germination et la croissance de plantes locales (tomate, navet, oseille de Guinée, Gombo) en présence du substrat obtenu. Ces expériences ont permis de prouver que le compostage en Andins permettait d'obtenir les résultats les plus satisfaisants. Ces travaux ont été complétés par des études concernant l'origine des éléments toxiques (les substances hydrosolubles étant particulièrement inhibitrices) et par celles des caractéristiques hydriques et physiques du co

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10

Jol, Hamdan Bin. "Saprolite and soil fertility in the humid tropics (Malaysia)." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309365.

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11

Grandisson, Mariane. "Gestion des systèmes d'agriculture itinérante sur brûlis dans l'ouest Guyane : contribution à l'étude de la reproductibilité et de la fertilité." Antilles-Guyane, 1997. http://www.theses.fr/1997AGUY0024.

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L'agriculture itinérante sur brulis (ai) est un mode de culture pratique sans intrant. Après deux ou trois cycles de cultures, la dégradation de la fertilité des sols contraint les agriculteurs à déplacer leurs cultures et le terrain est laisse en jachère. La jachère permet de reconstituer une biomasse, qui libèrera lors de la période de production suivante, après brulis, des éléments minéraux nécessaires à la croissance et au développement des cultures. Cette étude consistait, à fournir des éléments d'appui à la décision, dans le but d'une fixation à terme de ces systèmes traditionnels. Elle

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12

Kintche, Kokou. "Analyse et modélisation de l'évolution des indicateurs de la fertilité des sols cultivés en zone cotonnière du Togo." Phd thesis, Université de Bourgogne, 2011. http://tel.archives-ouvertes.fr/tel-00728812.

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Des données synchroniques de sols observées pendant 20 à 40 ans dans différentes zones agro-écologiques du Togo ont été utilisées pour analyser l'évolution de la fertilité du sol sous différentes pratiques culturales. Trois modèles de complexité croissante d'évolution du stock de C du sol ont été testés et le plus performant a été couplé au modèle QUEFTS pour apprécier l'effet des pratiques culturales sur l'évolution de cette fertilité. Bien que la fertilisation NPK ait été continuellement appliquée à la dose recommandée par la recherche (RR) ou à cette dose augmentée de 50% (1.5RR), les rende

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13

Dechert, Georg. "Nutrient dynamics and their control in land use systems of forest margins in Central Sulawesi, Indonesia." Doctoral thesis, [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970744676.

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14

Hartemink, Alfred E. "Soil fertility decline in the tropics with case studies on plantation crops." Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394197.

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15

Samba, Arona Ndiaye Samba. "Influence de Cordyla pinnata sur la fertilité d'un sol ferrugineux tropical et sur le mil et l'arachide dans un système agroforestier traditionnel au Sénégal." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25455.pdf.

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16

Chopart, Jean-Louis. "Relations entre état physique du sol, systèmes racinaires et fonctionnement hydrique du peuplement végétal : outils d'analyse in situ et exemples d'études en milieu tropical à risque climatique élevé." Grenoble 1, 1999. http://www.theses.fr/1999GRE10163.

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L'etude, fondee sur des travaux au senegal, en cote d'ivoire et au burkina-faso, interesse les cultures annuelles de la zone tropicale ouest-africaine soumise a un risque eleve de deficit hydrique. On y met en evidence une grande variabilite du rendement et de l'effet des modes de gestion du sol rendant difficile le choix de nouveaux systemes de culture. Dans cette region, il faut pourtant promouvoir des innovations conduisant a une production durable, plus elevee et plus stable. Pour comprendre et spatialiser l'interet des modes de gestion du sol, il faut caracteriser des variables intermedia

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17

Blavet, Didier. "Hydro-pédologie d'un versant représentatif d'un paysage sur socle granito-gneissique d'Afrique de l'Ouest (Togo) : Relations avec le comportement d'une plante cultivée." Montpellier 2, 1996. http://www.theses.fr/1996MON20281.

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18

Murovhi, Nndamuleleni. "Contribution to soil fertility by litter of selected sub-tropical fruit trees in the Ehnlanzeni District Municipality of Mpumalanga Province, South Africa / Nndamuleleni Murovhi." Thesis, 2010. http://hdl.handle.net/10394/14792.

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19

Bahr, Etienne. "Assessment of soil fertility change and sustainability of agroecological management in different land use systems of the southern Ecuadorian Andes." Doctoral thesis, 2014. https://tud.qucosa.de/id/qucosa%3A28753.

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The thesis was conducted to investigate soil fertility changes and assess the sustainability of agroecological management in different land-use systems of the southern Ecuadorian Andes using quantitative and qualitative methods. Ecuador still holds the highest deforestation rate of all Latin American countries which also has a large impact in the research area by forest conversion into agricultural land. Agricultural land-use systems in the research area are multifaceted due to heterogeneous biophysical and socio-economic conditions. To map this diversity, land-use systems were investigated in

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20

Unger, Malte Arne. "Relationships between soil chemical properties and forest structure, productivity and floristic diversity along an altitudinal transect of moist tropical forest in Amazonia, Ecuador." Doctoral thesis, 2010. http://hdl.handle.net/11858/00-1735-0000-0006-ADA3-B.

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21

Guillaume, Thomas. "Effects of rainforest transformation systems on carbon cycle and soil fertility." Doctoral thesis, 2015. http://hdl.handle.net/11858/00-1735-0000-0028-8682-5.

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22

Samba, Arona Ndiaye. "Influence de Cordyla pinnata sur la fertilité d'un sol ferrugineux tropical et sur le mil et l'arachide dans un système agroforestier traditionnel au Sénégal /." 1997. http://proquest.umi.com/pqdweb?did=737015851&sid=20&Fmt=2&clientId=9268&RQT=309&VName=PQD.

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