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| Registros recuperados: 159 | |
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| ANDRADE NETO, R. de C.; NOGUEIRA, S. R.; NASCIMENTO, G. C. do; NEGREIROS, J. R. da S.; GOMES, F. C. da R.. |
| A partir dos trabalhos integrados e sinérgicos de uma equipe com conhecimentos em diversas áreas da agricultura, a Embrapa Acre coloca à disposição dos produtores, professores e extensionistas, de forma objetiva e concisa, uma importante publicação referente à exploração racional da cultura do abacaxi. Trata-se do sistema de produção de abacaxizeiro que aborda desde questões relacionadas à importância econômica, solos, tratos culturais, manejo, controle de pragas, colheita e mercado até os coeficientes técnicos e indicadores econômicos para cultivo. |
| Tipo: Sistema de Produção (INFOTECA-E) |
Palavras-chave: Escalonamento da produção; Piñas; Tecnología de producción; Cultivares; Producción de plántulas; Encalado; Fertilizantes; Floración; Malezas; Plagas de plantas; Enfermedades y desórdenes de las plantas; Cosecha; Tratamiento postcosecha; Rendimiento de los cultivos; Costos de producción; Análisis económico; Costos de insumos; Industralización; Procesamiento de alimentos; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Abacaxi; Ananás Comosus; Sistema de Produção; Variedade; Muda; Produção; Calagem; Adubação; Floração; Indução; Erva Daninha; Praga de Planta; Doença de Planta; Colheita; Pós-Colheita; Rendimento; Custo de Produção; Análise Econômica; Insumo; Valor Nutritivo; Industrialização; Processamento; Pineapples; Production technology; Cultivars; Seedling production; Liming; Fertilizers; Flowering; Weeds; Plant pests; Plant diseases and disorders; Harvesting; Postharvest treatment; Crop yield; Production costs; Economic analysis; Input costs; Nutritive value; Industrialization; Food processing. |
| Ano: 2018 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1100056 |
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| Baisre, J. A.. |
| The alteration of the nitrogen (N) cycle by human activities is widespread and has often resulted in increased flows of nitrogen to the marine environment. In this paper we have attempted to know the changes of N fluxes in Cuba by quantifying the N inputs to the landscape from (1) fertilizer applications, (2) atmospheric deposition, (3) biological nitrogen fixation and (4) net import of food and feeds. N-inputs to the country progressively increased until the end of the 20th century, reaching a peak during the 80s when low cost fertilizer imported from the former Soviet Union led to heavy rates of application. This rapid growth represented more than a 5-fold increase with respect to pristine values; higher than the two-fold global increase of anthropogenic... |
| Tipo: Journal Contribution |
Palavras-chave: Nitrogen; Nitrogen cycle; Atmospheric deposition; Fertilizers. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/5111 |
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| Becegato,Valter Antonio; Ferreira,Francisco José Fonseca; Cabral,João Batista Pereira; Rafaelli Neto,Sílvio Luis. |
| In this study the K, U and Th radionuclide concentrations were determined in a sugar cane plantation that received large quantities of fertilizer and gypsum. Geochemical data were obtained for the clay, iron and organic matter in the soil samples, taken from depths of 0-20 and 20-40 cm. The average radionuclide concentrations were 71 Bq Kg-1 for K; 5.97 Bq Kg-1 for U, and 11.26 Bq Kg-1 for Th, and the uranium was variable (56%). The radionuclide average concentrations for the different fertilizer compositions varied in the range of 603.5 - 8855.0 Bq Kg-1 for K; 27.3 - 684.4 Bq Kg-1 for U, and 58 - 788.5 Bq Kg-1 for Th, and it was most variable for K (53%). Gypsum average concentrations were 82.6 Bq Kg-1 for K, 641.5 Bq Kg-1 for U, and 201.7 Bq Kg-1 for Th,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilizers; Soils; Radionuclides; Gamma-ray spectrometry. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100001 |
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| Becegato,Valter Antonio; Ferreira,Francisco José Fonseca; Machado,William César Pollonio. |
| Gamma spectrometric measurements were obtained for the agricultural soils aiming at characterizing the spatial distribution of radionuclide concentrations (K, eU and eTh), as well for the samples of phosphatic fertilizers and agricultural gypsum. In the study areas, three types of soils occured: Eutrophic Red Nitosol (Alfisoil), Eutroferric Red Latosol of clayey texture (Oxisoil) and Dystrophic Red Latosol of medium texture (Oxisoil). The results showed that the radionuclide concentrations in more clayey soils were higher than in more sandy soils, mainly as a function of a higher adsorption capacity of the former. For the area where human activity predominated, the average contents of K, eU and eTh were respectively 54.75; 10.22 and 7.27 Bq/Kg,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gamma-rays spectrometry; Soils; Fertilizers. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600022 |
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| Registros recuperados: 159 | |
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