Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

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	Provedor de dados 111 (1) 31 (1) 63 (1) 65 (1) Autor Amorim,Fernando Rodrigues de (1) Bredemeier,Christian (1) Drum,Maicon Andreo (1) Fochesatto,Elizandro (1) Giordano,Cecília Paz da Silva (1) Hemmat, Abbas (1) Lowenberg-DeBoer, James (1) Patino,Marco Tulio Ospina (1) Santos,David Ferreira Lopes (1) Silva,Jhonatan Alves da (1) Taghadomi-Saberi, Saeedeh (1) Turra,Marcos Alexandre (1) Vian,André Luis (1) Mais... Palavra-chave Variable rate (4) Biosystems engineering Precision agriculture (1) Corn (1) Crop Production/Industries (1) Field management (1) GPS (1) Greenseeker (1) Image processing (1) Mechanization (1) Precision farming (1) Production economics (1) Profitability (1) Saccharum spp (1) Triticum aestivum (1) Vegetation sensor (1) Yield (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Working or Discussion Paper (1) Ano 2022 (1) 2018 (1) 2015 (1) 1998 (1) País Brazil (2) China (1) United States (1) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Improving field management by machine vision - a review 111 Taghadomi-Saberi, Saeedeh; Hemmat, Abbas. Growing population of people around the world and thus increasing demand to food products as well as high tendency for declining the cost of operations and environmental preserving cares intensify inclination toward the application of variable rate systems for agricultural treatments, in which machine vision as a powerful appliance has been paid vast attention by agricultural researchers and farmers as this technology consumers. Various applications have introduced for machine vision in different fields of agricultural and food industry till now that confirms the high potential of this approach for inspection of different parameters affecting productivity. Computer vision has been utilized for quantification of factors affecting crop growth in field; such... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosystems engineering Precision agriculture; Field management; Image processing; Variable rate. Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3250 Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) 65 Vian,André Luis; Bredemeier,Christian; Turra,Marcos Alexandre; Giordano,Cecília Paz da Silva; Fochesatto,Elizandro; Silva,Jhonatan Alves da; Drum,Maicon Andreo. ABSTRACT: Biomass production and nitrogen (N) accumulated in wheat shoots may be used for quantifying optimal topdressing nitrogen doses. The objective of this study was to develop and validate models for estimating the amount of biomass and nitrogen accumulated in shoots and the N topdressing dose of maximum technical efficiency in wheat using the normalized difference vegetation index (NDVI) measured by an active optical canopy sensor. Field experiments were carried out in two years and treatments consisted of N doses applied at plant emergence and as topdressing. NDVI, shoot biomass and N accumulated in shoots at the growth stage of six fully expanded leaves and grain yield were evaluated, being determined the topdressing N dose of maximum technical... Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Vegetation sensor; Variable rate; Greenseeker. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900251 ECONOMICS OF VARIABLE RATE PLANTING FOR CORN 31 Lowenberg-DeBoer, James. This analysis works out the economic implications for variable rate seeding of the corn population response curves estimated by Pioneer Hi-Bred agronomists. Examples are developed for various mixes of low, medium and high yield potential soil, as well as for a range of seed costs and variable rate equipment costs. The strategies analyzed were: variable rate planting using agronomic recommendations for each yield potential zone, variable rate planting using an economic decision rule for each yield potential zone, an information strategy which sets the uniform planting rate at the highest population indicated by agronomic recommendations for any part of the field and a second information strategy which uses an economic decision rule for the whole field based... Tipo: Working or Discussion Paper Palavras-chave: Precision farming; Variable rate; Corn; GPS; Production economics; Crop Production/Industries. Ano: 1998 URL: http://purl.umn.edu/28685 Soil tillage and sugarcane planting: an assessment of cost and economic viability 63 Amorim,Fernando Rodrigues de; Patino,Marco Tulio Ospina; Santos,David Ferreira Lopes. ABSTRACT Yield and profitability levels in sugarcane crops demonstrate the importance of the agricultural practices adopted, especially for soil preparation and planting systems. This study evaluated the costs involved in 40 alternative methods for the establishment of sugarcane crops resulting from the combination of eight soil preparation systems and five planting options, followed by an assessment of the economic viability of sugarcane production for suppliers and sugar mills. Data were collected from 31 sugar mills and 42 suppliers in São Paulo State, Brazil, from the 2016/17 season. The cost analysis and discounted cash flow analysis were used to calculate economic viability. Localized soil preparation with a fixed application rate of inputs (soil... Tipo: Info:eu-repo/semantics/article Palavras-chave: Saccharum spp; Mechanization; Variable rate; Yield; Profitability. Ano: 2022 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162022000100101 Registros recuperados: 4 Primeira ... 1 ... Última

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