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	Provedor de dados REA (2) Autor Cherubin,Maurício R. (2) Santi,Antônio L. (2) Basso,Claudir J. (1) Bayer,Cimélio (1) Dagios,Ravel F. (1) Farias,Marcelo S. de (1) Pias,Osmar H. de C. (1) Mais... Palavra-chave Management zones (1) Plant population (1) Precision agriculture (1) Sampling costs (1) Sampling grids (1) Section control (1) Spatial variability (1) Zea mays (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2020 (1) 2019 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última TRANSITION FROM SYSTEMATIC TO DIRECTED SOIL SAMPLING DESIGNS IN AN AREA MANAGED WITH PRECISION AGRICULTURE REA Pias,Osmar H. de C.; Cherubin,Maurício R.; Santi,Antônio L.; Basso,Claudir J.; Bayer,Cimélio. ABSTRACT In agricultural areas with a historical of systematic soil sampling, alternative methodologies such as directed sampling design based on management zones (MZ) have been proposed to reduce sampling costs. The aim of this study was to evaluate the technical and economic impacts of replacing a dense systematic soil sampling design (cell size of 0.5 ha) by a systematic sampling with a smaller number of samples (cell size ranging from 1 to 4.5 ha), directed or conventional sampling design on the mapping of soil plant-available phosphorus (P), exchangeable potassium (K), and pHwater. The study was carried out in an agricultural area of 120 ha with soil classified as an Oxisol. The directed sampling designs were based on MZ delimited from data of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Sampling costs; Sampling grids; Spatial variability; Management zones. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000300400 PRODUCTIVITY OF CORN HYBRIDS IN RELATION TO SOWING OVERLAP REA Farias,Marcelo S. de; Dagios,Ravel F.; Santi,Antônio L.; Cherubin,Maurício R.. ABSTRACT The automatic control of section shut-off in seed drills minimizes seeding overlap and can reduce productivity losses, especially in responsive crops such as corn. In that context, this study evaluated the effect of sowing overlap on the grain yield and productivity of three corn hybrids. A DB-50 precision seed drill, with 33 rows equipped with a 16-row automatic section control, was used in this experiment. A randomized block design was applied to test three corn hybrids under two sowing conditions (without sowing overlap - WOSO; and with sowing overlap - WSO), with four replications. The analyzed variables were the number of plants per hectare, the number of cobs per hectare, cob length, the number of grains per cob, the thousand grain weight,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Precision agriculture; Section control; Plant population. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400489 Registros recuperados: 2 Primeira ... 1 ... Última

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