Influence of spray mixture volume and flight height on herbicide deposition in aerial applications on pastures

The objective of the present study was to analyze the influence of spray mixture volume and flight height on herbicide deposition in aerial applications on pastures. The experimental plots were arranged in a pasture area in the district of Porto Esperidião (Mato Grosso, Brazil). In all of the treatments, the applications contained the herbicides aminopyralid and fluroxypyr (Dominum) at the dose of 2.5 L c.p. ha-1, including the adjuvant mineral oil (Joint Oil) at the dose of 1.0 L and a tracer to determine the deposition by high-performance liquid chromatography (HPLC) (rhodamine at a concentration of 0.6%). The experiment consisted of nine treatments that comprised the combinations of three spray volumes (20, 30 and 50 L ha-1) and three flight heights (10, 30 and 40 m). The results showed that, on average, there was a tendency for larger deposits for the smallest flight heights, with a significant difference between the heights of 10 and 40 m. There was no significant difference among the deposits obtained with the different spray mixture volumes.

Uma abordagem teórica e experimental do oscilador harmônico em duas dimensões utilizando as curvas de Lissajous

The study of oscillatory phenomena is an important topic in several areas of knowledge. The understanding and the solution of many problems that scientists and engineers confront nowadays can be formulated, at least as an analogy, in terms of an oscillatory movement. The description of the motion of this nature has remarkable contributions to the mathematical and conceptual formation of the students and for solving daily problems in several areas. In this paper we propose a theoretical and experimental approach involving the phenomenon of harmonic oscillations in two dimensions. Lissajous curves were used as experimental demonstration of the resulting trajectories. These curves were obtained from relatively simple experimental apparatus, which is affordable in most teaching laboratories of physics.

Physicochemical characteristics of experimental net melon hybrids developed in Brazil

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

Algoritmo genético aplicado ao controle do mosquito transmissor da dengue

Pós-graduação em Biometria - IBB

Critérios compostos para delineamentos ótimos robustos

Pós-graduação em Biometria - IBB

A história oral como uma abordagem didático-pedagógica na disciplina política educacional brasileira de um curso de licenciatura em matemática

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

O programa institucional de bolsas de iniciação à docência (PIBID) na formação de professores de matemática: perspectivas de ex-bolsistas

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Relax and cut: limitantes duais para o problema do caixeiro viajante

Pós-graduação em Matemática - IBILCE

Espaços vetoriais e topológicos de intervalos generalizados com alguns conceitos de cálculo e otimização intervalar

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo genômico e transcritômico de isolados selecionados de alto rendimento de dorna de fermentação alcoólica de Saccharomyces cerevisiae

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Planejamento do plantio e da colheita de cana-de-açúcar utilizando técnicas matemáticas de otimização

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