Thesis (M.S.)--University of Missouri-Columbia, 2004. / Typescript. Includes bibliographical references. Also available on the Internet.

Thesis (M.S.)--Ohio State University, 1985. / Includes bibliographical references (leaves 60-61). Available online via OhioLINK's ETD Center

Orientador: João Antonio Galbiatti / Banca: Fábio Olivieri de Nobile / Banca: Emerson Fachini / Banca: Luiz Carlos Pavani / Banca: Danilo César Checchio Grotta / Resumo: Tem-se procurado incentivar o estudo de viabilidade do uso de sistemas integrados de produção de energia e alimentos para, da melhor forma possível, se utilizar os recursos específicos de cada agros sistema e se criar, sempre que possível, circuitos de realimentação entre diversas atividades. de modo a transformar resíduos em riquezas. Nesse contexto, desenvolveram-se estudos durante os anos de 2007 a 2011, em área experimental da Faculdade de Ciências Agrárias e Veterinárias da Universidade Estadual Paulista, em Jaboticabal-SP, Brasil.Utilizou-se de um latossol roxo com 12% de declividade e exposição Norte. Considerou-se como tratamentos a utilização de efluente de biodigestor incorporado ao solo em três doses diferentes, e como testemunha a adubação mineral convencional e sem adubação. Os principais aspectos analisados foram: densidade aparente do solo; Velocidade de infiltração da água no solo; desenvolvimento da área foliar, acumulação de matéria seca nas diferentes partes e produção de grãos da planta de milho. Da análise dos resultados e nas condições que se desenvolveu o estudo, concluiu-se que o efluente de biodigestor aplicado em anos consecutivos promove um melhor condicionamento do solo e um melhor desenvolvimento das plantas / Abstract: The use of integrate systems has been stimulated to produce energy and food, so that specific resources of each agrosystem can be used in the best way, as well to create always as possible circuits of feedback between various activities so as to transform residues in wealth. so, a study using corn crop was carried out from 2007 to 2011, in the FCAV/UNESP Experimental Farm, in Jaboticabal City, State of São Paulo, Brazil. Red soil with 12% slope and north exposition was used. The treatments consisted of three levels of biodigestor biofertilizant incorporated into soil, conventional mineral fertilization (control 1) and without fertilization (control 2). To reach the objectives the following parameters were evaluated: soil apparent density, water infiltration speed into the soil, development of corn foliar area, dry matter accumulation and yield. Based on the results and the experimental conditions it was concluded that the biodigestor biofertilizant applied during successive years into the soil promoted better soil conditioning, as well as plant development / Doutor

Orientador: Valdemir Antonio Rodrigues / Banca: Maurício Ranzini / Banca: Maria Helena Moraes Spinelli / Resumo: O solo e seus atributos específicos são capazes de fornecer informações relevantes para o diagnóstico do ambiente, de sua estrutura florestal e climática. O objetivo deste estudo foi avaliar e comparar de forma descritiva os atributos físico-hídricos do solo com diferentes tipos de vegetação sob as mesmas condições climáticas e condições controladas, ao longo do ano. A hipótese é que as propriedades físico-hídricas do solo se alteram com os diferentes tipos de vegetação estabelecidos em longo prazo. O estudo foi realizado em solo sob condição de lisímetros estabelecidos há mais de 30 anos com as espécies: Paspalum notatum (gramínea), Pinus elliottii, Eucalyptus urophylla e em uma área com Floresta Atlântica, sendo classificada como Ombrófila Densa Alto-Montana, no Parque Estadual da Serra do Mar - Núcleo Cunha, São Paulo. O solo é classificado como Latossolo Vermelho-Amarelo, de textura média. A coleta foi realizada em anéis volumétricos em três camadas: 0,00 - 0,05 m, 0,30 - 0,35 m e 0,50 - 0,55 cm, nos meses de março, junho, setembro e dezembro. Foram realizadas as comparações considerando densidade do solo, densidade de partículas, porosidade total, umidade do solo e armazenamento de água no solo e armazenamento acumulado de água no perfil do solo. Foi observada uma maior capacidade de armazenamento de água no solo para os meses com as menores precipitações na Floresta Atlântica, considerando que esta vegetação apresentou melhores condições para manter a água no sistema so... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The soil and its specific attributes are capable of providing relevant information for the diagnosis of the environment, its forest and climatic structure. The objective of this study was to evaluate and to compare in a descriptive way the physical-water attributes of the soil with different vegetation types under the same climatic conditions and controlled conditions, throughout the year. The hypothesis is that the physical-water properties of the soil change with the different types of vegetation established in the long term. The study was carried out in soil under lysimeters established for more than 30 years with the species: Paspalum notatum (grass), Pinus elliottii, Eucalyptus urophylla and in an area with Atlantic Forest, being classified as Ombrophilous Dense Alto-Montana, in the Park State of Serra do Mar - Cunha, São Paulo. The soil is classified as Red-Yellow Latosol, of medium texture. The collection was performed in volumetric rings in three layers: 0,00 - 0,05 m, 0,30 - 0,35 m and 0,50 - 0,55 cm, in the months of March, June, September and December. The comparisons were made considering soil density, particle density, total porosity, soil moisture and water storage in the soil and accumulated water storage in the soil profile. A higher soil water storage capacity was observed for the months with the lowest rainfall in the Atlantic Forest, considering that this vegetation presented better conditions to maintain water in the soil-plant-atmosphere system for longer in the environment. The Pinus elliottii presented the lowest moisture storage values of water in the soil for all evaluated months. There were significant differences by the Tukey test at the 5% significance level of the soil physical-hydric attributes among the different types of vegetation in the evaluated months. It can be mentioned that the methodology used is simple and in low cost, but able ... / Mestre

No description available.

No description available.

No-tillage establishment into a killed surface mulch on agricultural soil increased marketable acorn squash (Curcurbita pepo L. 'Table Ace’) yield by 29% as compared to a conventional tillage practice. These yield differences are attributed to increased plant population and possible improved water infiltration in no-tillage systems. A no-tillage system in which the surface mulch was suppressed by mowing decreased marketable yields due to possible competition with weeds and the suppressed living mulch cover for nutrients and water. The minesoil yields were reduced due to unavailability of nitrogen (N); however, no-tillage with a killed surface mulch was a more effective treatment when compared to the others. Levels of total N in tissue indicated that a N deficiency did occur in plants grown in all tillage systems in minesoil. Seven nitrogen treatments were investigated: no nitrogen, ammonium, nitrate, urea ammonium nitrate solution (UAN), and UAN in combination with a nitrification inhibitor, nitrapyrin. Two rates of each N source were used, the recommended rate, 80 kg N/ha, and 160 kg N/ha. Squash yields were not affected by the source of N used or by addition of nitrapyrin, but the use of N did increase yields compared to control plots of 0 kg N/ha at both sites. The double rate of N was effective in increasing yields on minesoil, but not on agricultural soil. / Master of Science

Thesis (M. Phil.)--University of Hong Kong, 1993.

Thesis (M.Phil.)--University of Hong Kong, 1993. / Also available in print.

Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 42-54). Also available on the World Wide Web.