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| Registros recuperados: 13 | |
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| Mendieta Muñoz, Lorenzo Antonio. |
| Con el objeto de conocer el movimiento espacio-temporal de los nutrientes en el bulbo húmedo de un suelo vertisol se estableció un experimento en una parcela comercial para la producción de fresa en Zamora, Michoacán, con extractores de solución (ESS) comúnmente denominados “chupatubos”, éstos se instalaron en macro-túneles con fresas, en tres profundidades (10, 20 y 30 cm), se consideraron tres repeticiones por cada profundidad y fueron distribuidos completamente al azar en 2 hectáreas. El estudio se realizó durante 18 semanas. Los análisis químicos de la solución del suelo se realizaron por espectrofotometría AES-ICP en un equipo Varian, Liberty II y se determinó determinó P, K, Ca, Mg, Fe, Mn, Zn, Cu Na y B. Se observaron diferencias estadísticas... |
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Palavras-chave: Fragaria vesca L.; Solución del suelo; Extractores de solución; Tensiómetro; Soil solution; Solution extractors; Tensiometer; Maestría; Edafología. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/378 |
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| Pereira,Michel E. M.; Lima Junior,Joaquim A. de; Souza,Rodrigo O. R. de M.; Gusmão,Sergio A. L. de; Lima,Valdeides M.. |
| ABSTRACT In order to provide scientific information about the irrigated cauliflower production in Northeast of Para, an experiment was installed in the Federal Rural University of Amazonia farm with the Desert hybrid under different water tensions on the ground and boron doses in the municipality of Igarapé-Açu – PA. The experimental design was a randomized block in a 4 x 4 factorial, sixteen treatments with three replications. The treatments consisted of four water tensions on the ground (15, 30, 45 and 60 kPa) as an indicative of the time to irrigate and four boron doses (0, 2, 4 and 6 kg ha-1). The irrigation was performed with drippers and irrigation management with tensiometers. Each plot, 4 m2, consisted of 8 plants located in the spacing of 1.0 m... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica oleracea var; Botrytis; Drip irrigation; Tensiometer. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500811 |
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| Costa,Lilian L.; Silva,Henrique J. P. Soares da; Almeida,Dieimisson P.; Ferreira,Marcelo da C.; Pontes,Nadson de C.. |
| ABSTRACT Biological insecticides can be another pest control method used in integrated pest management; hence there is a demand for scientific information about these products to understand the appropriate application technique. The aim of this study was to evaluate the spray spectra data by different nozzle types using biological insecticide isolated and with adjuvants, as well the surface tension of these spray solutions. For droplet spectra data, a particle size analyzer was used and for surface tension of the spray solution, the method of pendant drop was used. Among the nozzles tested, ADI 11002 provided greater droplets median diameter volume, a lower percentage of droplets with diameters less than 100 μm and also the highest coefficient of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coefficient of uniformity; Volumetric median diameter; Application technology; Tensiometer. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200292 |
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| Oliveira,Jakeline R. de; Koetz,Marcio; Bonfim-Silva,Edna M.; Silva,Tonny J. A. da. |
| ABSTRACT The cultivation of upland rice (Oryza sativa) in Brazil occurs mainly in the Cerrado, a region with adverse weather conditions. The use of silicon in its cultivation becomes important, since this nutrient provides higher rigidity, lower transpiration and higher resistance to dry spells in rice plants. The objective of the present study was to evaluate the effect of silicon fertilization and soil water tensions on upland rice development and yield in a Cerrado Oxisol. A 5 x 5 fractionated factorial with five soil water tensions (0, 15, 30, 45 and 60 kPa) and five silicon doses (0, 120, 240, 480 and 960 mg dm-3) was used, which were distributed in a randomized block design, with four replicates. Plant height, number of tillers, number of panicles,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Tensiometer; Silicon. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200138 |
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| Silva,Monica Martins da; Libardi,Paulo Leonel; Fernandes,Flávia Carvalho Silva. |
| Determining the intensity of the water balance components in the control volume of a soil, and consequently defining the most likely periods of occurrence of a water deficit in a crop, is an exercise that requires knowledge about soil, climate and plant factors. This research aimed to evaluate soil water balance components at phenological stages of corn (Zea mays L.) under no-till system, when fertilized with 60, 120, and 180 kg ha-1 of nitrogen. The field experiment was carried out in Piracicaba, State of São Paulo, Brazil, on a Typic Hapludox. Evaluations were made in the 2004/2005 and 2005/2006 corn cropping seasons, divided over three stages according to the plant's phenology. Runoff was not taken into account. Measurements were made for precipitation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Internal drainage; Hydraulic conductivity; Actual evapotranspiration; Tensiometer; No-till system. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400013 |
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| Pavani, Luiz Carlos; UNESP; Lopes, Adriano da Silva; UEMS; Pereira, Gener Tadeu; UNESP. |
| A cultura do feijoeiro apresenta elevada importância no contexto agrícola nacional. Além de ser uma cultura que atende às características da agricultura familiar, também é cultivada em áreas extensivas com alta tecnologia. Pesquisas relacionadas ao desenvolvimento do feijoeiro frente às variantes edafoclimáticas regionais vêm assumindo papel de destaque, principalmente por se tratar de uma planta sensível tanto ao déficit quanto ao excesso hídrico. O objetivo deste trabalho foi avaliar a cultura do feijoeiro de ‘inverno’ submetida a dois métodos de manejo de irrigação, em pivô central, um via solo por meio de tensiômetros, outro via clima por meio do tanque Classe ‘A’, em dois sistemas de plantio, convencional e direto, no primeiro ano. Foram avaliados o... |
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Palavras-chave: 5.01.00.00-9 Agronomia Phaseolus vulgaris; Potencial mátrico; Tanque Classe ‘A’; Tensiômetro Engenharia de Água e Solo Phaseolus vulgaris; Matrix potential; Class ‘A’ pan; Tensiometer. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/621 |
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| Registros recuperados: 13 | |
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