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Concentration and removal of macronutrients by soybean seeds over 45 years in B...
Filippi, Dionata; Denardin, Luiz Gustavo de Oliveira; Ambrosini, Amanda; Alves, Lucas Aquino; Flores, João Pedro Moro; Martins, Amanda PosseltA good soil fertility management for soybean production must consider the amount of nutrients that are exported by seeds. In recent decades, soybean yield has increased due to better crop management and genetic improvements, which may affect the amount of nutrients removed. Therefore, this study aimed (i) to analyze the relationship between the concentration of macronutrients in soybean seeds in Brazil with soy...
Common bean yield responses to nitrogen fertilization in Brazilian no-till soil...
Pias, Osmar Henrique de Castro; Welter, Cristian Andrei; Tiecher, Tales; Cherubin, Maurício Roberto; Flores, João Pedro Moro; Alves, Lucas AquinoTexto completo; Although numerous studies have been conducted with common bean regarding nitrogen (N) dose, time of application, and source in no-till (NT) soils in Brazil, the heterogeneity of the results makes it difficult to establish technical recommendations based on individualized studies. This meta-analysis aimed to rank the main factors influencing common bean response to N management in NT areas. The d...
Manejo da acidez do solo e adubação sulfatada no sistema plantio direto
Pias, Osmar Henrique de CastroA acidez ao longo do perfil do solo e a deficiência de enxofre (S) são fatores que restringem a produtividade das culturas de grãos no Brasil. Dessa forma, objetivou-se, a partir da compilação de dados disponíveis na literatura e da condução de protocolos de campo, determinar as melhores estratégias de manejo da acidez do perfil do solo e da adubação com S para culturas de grãos em solos sob sistema plantio dir...
Caracterização da variabilidade espacial do índice relativo de clorofila na cul...
Pias, Osmar Henrique de Castro; Santi, Antônio Luis; Cherubin, Maurício Roberto; Berghetti, Juliano; Oliveira, Thiago Campos deA aplicação localizada de nitrogênio, baseada no índice relativo de clorofila das folhas, pode proporcionar inúmeros benefícios econômicos e ambientais, no entanto, o conhecimento sobre a metodologia de amostragem ainda é incipiente. Nesse sentido, este estudo objetivou avaliar o uso de diferentes malhas amostrais na caracterização da variabilidade espacial do índice relativo de clorofila das folhas da cultura ...
Eficiência de grades amostrais e zonas de manejo na acertividade da correção e ...
Pias, Osmar Henrique de CastroCoordenação de Aperfeiçoamento de Pessoal de Nível Superior; Soil samples from sampling grids is currently the leading precision farming tool used in Brazil. But it still has doubts about the economic feasibility of using grids with high density points. New technologies such as the use of management zones (MZ) to guide soil samples have been studied in order to reduce the number of samples and consequently the ...
Yield and physico-chemical quality of ‘Valencia’ orange in the region North of ...
Frighetto, Juliete Maria; Santi, Antônio Luis; Pias, Osmar Henrique de Castro; Trevisan, Renato; Corassa, Geomar Mateus; Damian, Junior MelloThe objective of this study was to perform the mapping of productivity and physico-chemical quality of fruit in orchard of 'Valencia' orange, as well as evaluating of the correlation between them valuables, aimed at precision agriculture. The study was conducted in a commercial orchard of 0.82 ha. The collections made on a sampling grid of 18 x 21 m, totaling 29 points. The parameters analyzed were: number of f...
Doses of controlled release fertilizers in the chlorophyll content and producti...
Pias, Osmar Henrique de Castro; Cantarelli, Edison Bisognin; Berghetti, Juliano; Leschewitz, Rogério; Kluge, Elizandro Ricardo; Somavilla, LucindoThe objective of this work was to define the best doses of Osmocote® for Apuleia leiocarpa seedling production for 60 and 90 days residence in the seedling nursery after the transplanting and to observe the chlorophyll index response of the seedlingsduring the studying period. The experimental design used was completely randomized, with five treatments and ten repetitions. The treatments consisted of increasing...