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| Registros recuperados: 35 | |
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| SHIRATSUCHI, L. S.; MARCHÃO, R. L.; JERKE, C.; RESENDE, A. V.; FONTES, J. R. A.; OLIVEIRA, C. M.; VILELA, M. de F.; SÁ, M. A. C. de; SANTOS JÚNIOR, J. de D. G. dos; HURTADO, S. M. C.. |
| RESUMO: O objetivo deste trabalho foi delinear uma metodologia de geração de mapas multitemáticos para o apoio à tomada de decisão nas culturas de grãos, considerando a abordagem integrada e hierarquizada dos fatores que interferem na produtividade. A área foi mapeada para os atributos da fertilidade do solo, nutrição de plantas, plantas daninhas e estande de plantas, sendo colhida com colhedora equipada com sensores de produtividade, umidade e GPS para a geração de mapas de produtividade. Utilizou-se a análise de componentes principais (ACP) com o intuito de correlacionar a produtividade das culturas com a disponibilidade dos nutrientes do solo e planta, infestação de plantas daninhas e estande. Os três maiores fatores que interferiram na produtividade,... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Precision farming; Productivity.; Agricultura de Precisão; Mapa; Milho; Produtividade; Soja; Tomada de Decisão.; Cartography; Decision making.. |
| Ano: 2007 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/572273 |
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| Brookes, Graham; Yu, Tun-Hsiang (Edward); Tokgoz, Simla; Elobeid, Amani E.. |
| Biotech crops have now been grown commercially on a substantial global scale since 1996. This paper examines the production effects of the technology and impacts on cereal and oilseed markets through the use of agricultural commodity models. It analyses the impacts on global production, consumption, trade and prices in the soybean, canola and corn sectors. The analysis suggests that world prices of corn, soybeans and canola would probably be, respectively, 5.8%, 9.6% and 3.8% higher, on average, than 2007 baseline levels if this technology was no longer available to farmers. Prices of key derivatives of soybeans (meal and oil) would also be between 5% and 9% higher, with rapeseed meal and oil prices being about 4% higher than baseline levels. World prices... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Biotechnology; Cereals; Crop yields; Oilseeds; Price effects; Productivity.; Crop Production/Industries; Demand and Price Analysis; Productivity Analysis. |
| Ano: 2010 |
URL: http://purl.umn.edu/56984 |
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| Gonçalves-Trevisoli, Edilaine Della Valentina; Mendonça, Heloísa Ferro Constâncio; Dildey, Omari Dangelo Forlin; Dartora, Janaína; Rissato, Bruna Broti; Coltro-Roncato, Sidiane; Klosowski, Élcio Silvério; Tsutsumi, Cláudio Yuji; Echer, Marcia de Morais. |
| The objective of this work was to evaluate the effect of environment on the productive performance of arugula in different row spacings and plant spacing. The experiment was conducted in the spring, summer 2011 and in the autumn and winter 2012. The experiment design was a randomized complete block design with four replications in a 3x2 factorial design. The first factor consisted to the row spacings (0.20; 0.25 and 0.30 m) and the second to the plant spacings (0.05 and 0.10 m). The plant height and diameter, leaf number, leaf area and total leaf fresh matter and productivity were evaluated. The data were subjected to variance analysis and the average were compared by Tukey test (p<0.05). In the spring and in the plant spacing of 0.05m were verified... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cultivation period; Eruca sativa; Productivity.. |
| Ano: 2017 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14040 |
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| Fuzaro, Leandro; Xavier, Nayara Luchini; Carvalho, Fábio Janoni; Nery, Flávia Andrea Nery; Carvalho, Stephan Malfitano; Andaló, Vanessa. |
| The objective of this study was to evaluate the influence of pollinating insects on canola productivity for different commercial hybrids, Hyola 61 and Hyola 433, in Minas Gerais State, Brazil. The studies were conducted at the Fazenda Experimental Água Limpa of the Federal University of Uberlândia. To evaluate the influence of pollination by bees on the production of canola seeds, an experiment was carried out to exclude floral visitors and compare canola seed production following four treatments: (a) autogamy in Hyola 61, (b) autogamy in Hyola 433, (c) open pollination in Hyola 61, with insects having free access, and (d) open pollination in Hyola 433, with insects having free access. Flowers that were available for pollination had 25% and 18.8% heavier... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apis mellifera; Brassica napus; Tropicalization; Productivity.; Entomologia Agricola. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39315 |
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| Amaral, Carita Liberato; Pavan, Guilherme Bacarin; Pereira, Fernanda Campos Mastrotti; Alves, Pedro Luis da Costa Aguiar. |
| Weed interference can reduce chickpea growth and, therefore, productivity depending on the period of coexistence and the nutritional status of the crop, among other factors. A study was performed over two crop years to estimate the critical period of weed interference (CPWI) during chickpea production under three doses of nitrogen (N) fertilizer topdressing (0, 50, and 75 kg N ha-1). The experiments were conducted at 0, 7, 14, 21, 28, 35, 42, 56, 63, and 140 days after emergence (DAE) of chickpea/weed coexistence under two conditions: initially weed-free and initially weed-infested. The presence of weeds negatively affected chickpea production and reduced yields by 70% on average regardless of N rate, rendering the crop economically unfeasible. The CPWI... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cicer arietinum L.; Coexistence periods; Critical period of interference; Productivity.; Matologia. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35666 |
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| Registros recuperados: 35 | |
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