Matéria orgânica do solo em rotações de culturas sob sistema semeadura direta

Pós-graduação em Agronomia (Agricultura) - FCA

Modelos de estimativa da radiação atmosférica em função da temperatura, umidade e dos índices radiométricos Kt e Kd para Botucatu - SP

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Comportamento de híbridos de milho transgênicos e respectivos híbridos isogênicos convencionais em relação à infestação de Spodoptera Frugiperda (j. E. Smith,1727) (Lepidoptera: Noctuidae) em duas localidades e épocas de semeadura

The fall armyworm Spodoptera frugiperda is one of the most important pests of maize. Various studies are conducted for their management, integrating chemical and biological control tactics as well as resistant plants. In order to offer alternatives for an efficient management of this pest with minimal use of pesticides, the technology of genetically modified plants resistant to insects has been widely studied. The aim of the present study was to evaluate the natural infestation of larvae of S. frugiperda and their injuries under field conditions in transgenic maize hybrids compared to their conventional isogenic counterparts at two sowing dates and two regions. The hybrids were planted in the off season of 2010 in Jaboticabal, SP, Brazil, and the summer of 2010/2011 in Jaboticabal, and Pindorama, SP, in a randomized block with seven treatments (hybrids) and four replications. Different levels of infestation of larvae occurred throughout the phenological development of plants in conventional and genetically modified hybrids with significant differences between the two groups in most evaluations. The hybrid 2B710HX was the least infested with caterpillars and had the least damaged leaf area. It follows that the Cry1F toxin was the most effective in protecting the plant in relation to other toxic proteins expressed by the other Bt hybrids against infestation and damage promoted by this pest, regardless of time of sowing.

Inter-relações da produtividade de cana soca com a resistência à penetração, umidade e matéria orgânica do solo

The sugarcane crop plays an important role on Brazilian economy,, especially in the aspect related to alternative energy sources. Yield of ratoon cane (2nd cycle) was evaluated in relation to resistance to penetration, gravimetric moisture and organic matter in a Typic Tropustalf, in the municipality of Suzanápolis (SP), 20º28'10'' S and 50º49'20'' W, in the Brazilian cerrado, in 2009. The main purpose was to select, among the attributes surveyed, the one with the highest linear and spatial correlations that explains the variability of sugar cane yield. A geostatistical grid was installed in order to collect data from the soil as well from the plant, with 120 sampling points in an area of 14.53 ha. Organic matter correlated linearly and negatively with penetration resistance, indicating that the soil management practices that aim its increase in the soil profile can improve soil physical conditions, and consequently, the development and yield of sugarcane. Both gravimetric moisture (UG) and content of soil organic matter (OM) correlated directly, linearly (UG2 and MO1) and spatially (UG1 and MO1) with sugarcane yield, proving to be the best attributes, among the evaluated ones, to estimate and increase the sugarcane yield.

Interação de genótipos de milho vs locais, anos e épocas de semeadura

Pós-graduação em Agronomia (Genética e Melhoramento de Plantas) - FCAV

Utilização de maturadores para antecipação da colheita do milho

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Efeitos do teor de umidade da madeira no fresamento de Pinus Elliottii

Pós-graduação em Engenharia Mecânica - FEG

Desempenho agronômico e qualidade tecnológica de cultivares de feijão-caupi em função da época de semeadura em Uberaba-MG

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Efeito de sistemas de manejo do solo e velocidade de semeadura no desenvolvimento do sorgo forrageiro

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação do efeito da inclinação e umidade antecedente na qualidade e quantidade das parcelas escoadas, percoladas e armazenadas em telhado verde extensivo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Arranjo espacial, densidade e época de semeadura no acúmulo de matéria seca e nutrientes de três adubos verdes

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Produtividade, eficiência energética e econômica em semeadura cruzada de soja

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Adubação nitrogenada em genótipos de soja associada à inoculação em semeadura direta no cerrado

Pós-graduação em Agronomia - FEIS

Morfometria, umidade do solo e risco de erosão laminar da microbacia do córrego pimenta da fazenda São Manuel

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Componentes produtivos do trigo afetados pela densidade de semeadura e aplicação de regulador vegetal

Improvement on yield potential of plants by crop management is the main research challenge due to the growing of food demand worldwide. The objective of this work was to study physiological and morphological traits and its relationship with yield components and yield of wheat as affected by sowing densities and plant growth regulators. The experimental design was a split-plot design with four replications. The plots were consisted by four sowing densities ( 30, 50 70 and 90 plants m(-1)) and the subplots were consisted by plant growth regulators [control, (IBA+GA+KT), Trinexapac-Ethyl e (IBA+GA+KT) + Trinexapac-Ethyl]. Dry matter accumulation, plant height, source-sink distance, gas exchange and yield were determined. Trinexapac-Ethyl application resulted in decreasing of plant height, source-sink distance and flag leaf length; however, the grain yield was not affected. The number of plants per unit area affected dry matter accumulation. Higher dry matter accumulation showed direct relationship with yield and yield components in lower plant densities.