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dc.contributor.advisorMuñoz, Miguel A.
dc.contributor.authorQuiñonez-González, Katherine
dc.date.accessioned2018-05-16T16:08:10Z
dc.date.available2018-05-16T16:08:10Z
dc.date.issued2007
dc.identifier.urihttps://hdl.handle.net/20.500.11801/568
dc.description.abstractCuatro suelos ácidos de Puerto Rico fueron evaluados para determinar la cantidad de Al3+ extraíble utilizando soluciones de 1 M KCl, 0.33 M LaCl3 y 0.5 M CuCl2. Los suelos evaluados fueron Alonso (Oxic Dystrudepts), Consumo (Typic Haplohumults), Corozal (Typic Hapludults) y Humatas (Typic Haplohumults). Muestras de suelo fueron tomadas de 0-20 y 20-40 cm de profundidad. El Al3+ extraído fue determinado por espectroscopía de absorción atómica (AAS). El pH varió de 4.43 a 5.76, siendo menor de 20-40 cm de profundidad. El contenido de material orgánica varió de 0.86 a 3.51%, siendo menor de 20-40 cm de profundidad. La solución de 0.5 M CuCl2 extrajo la mayor cantidad de Al3+, seguido por 0.33 M LaCl3 y 1 M KCl a 0-20 cm de profundidad en todos los suelos. La solución de 0.33 M LaCl3 extrajo cantidades similares de Al3+ en los suelos Corozal y Humatas de 20-40 cm de profundidad. El menor contenido de Al3+ se observó en Alonso de 20-40 cm de profundidad, con un promedio de 0.02, 0.43 y 1.92 cmolc kg-1 con 1 M KCl, 0.33 M LaCl3 y 0.5 M CuCl2, respectivamente. La mayor cantidad de Al3+ extraído se observó en Corozal de 20-40 cm de profundidad, con un promedio de 13.2, 13.1 y 15.6 cmolc kg-1 con 1 M KCl, 0.33 M LaCl3 y 0.5 M CuCl2, respectivamente. Las soluciones de 0.33 M LaCl3 y 0.5 M CuCl2 extrajeron cantidades similares de Al3+ de 20-40 cm de profundidad, donde se encontraba el menor contenido de materia orgánica.
dc.description.abstractFour acid soils from Puerto Rico were evaluated for their extractable Al3+ with 1 M KCl, 0.33 M LaCl3, and 0.5 M CuCl2 solutions. The soils included in the study were Alonso (Oxic Dystrudepts), Consumo (Typic Haplohumults), Corozal (Typic Hapludults), and Humatas (Typic Haplohumults). Soil samples were collected at 0-20 and 20-40 cm depths. Extractable Al3+ was determined by Atomic Absorption Spectroscopy. Soil pH ranged from 4.43 to 5.76 and was lower at the 20-40 cm depth. Soil organic matter content ranged from 0.86 to 3.51% and was lower at the 20-40 cm depth. The 0.5 M CuCl2 solution extracted the highest amount of Al3+, followed by 0.33 M LaCl3, and 1 M KCl, at the 0-20 cm depth in all soils. At 20-40 cm depth LaCl3 extracted similar amounts of Al3+ from Corozal and Humatas soils. The lowest content of extractable Al3+ at 20-40 cm depth was observed on Alonso soil, with an average of 0.02, 0.43, and 1.92 cmolc kg-1 for 1 M KCl, 0.33 M LaCl3, and 0.5 M CuCl2, respectively. The highest amount of extractable Al3+ at 20-40 cm depth was observed on Corozal soil, with an average of 13.2, 13.1, and 15.6 cmolc kg-1 for 1 M KCl, 0.33 M LaCl3, and 0.5 M CuCl2, respectively. The 0.33 M LaCl3 and 0.5 M CuCl2 solutions extracted similar amounts of Al3+ at the 20-40 cm depth, where lower organic matter content was present.
dc.description.sponsorshipThe McIntire Stennis (MS-13)en_US
dc.language.isoenen_US
dc.subjectCoffee plantationsen_US
dc.subjectSoil climateen_US
dc.subjectP. carbonariumen_US
dc.subject.lcshSoils--Aluminum content--Puerto Rico.en_US
dc.subject.lcshCoffee--Soils--Puerto Rico.en_US
dc.subject.lcshCoffee--Effect of light on--Puerto Rico.en_US
dc.subject.lcshHumus--Composition.en_US
dc.titleOrganic matter and exchangeable aluminum interactions in soils cultivated with coffee (Coffea arabica)en_US
dc.typeThesisen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2007 Katherine Quiñonez Gonzálezen_US
dc.contributor.committeeFlores, Carlos A.
dc.contributor.committeeSnyder, Victor
dc.contributor.representativeRivera, Luis
thesis.degree.levelM.S.en_US
thesis.degree.disciplineSoil Sciencesen_US
dc.contributor.collegeCollege of Agricultural Sciencesen_US
dc.contributor.departmentDepartment of Crops and Agro-Environmental Sciencesen_US
dc.description.graduationYear2006en_US


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