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| Machado,Roriz Luciano; Carvalho,Daniel Fonseca de; Costa,Janaina Ribeiro; Oliveira Neto,Dionízio Honório de; Pinto,Marinaldo Ferreira. |
| As características físicas das chuvas determinam sua erosividade, que constitui importante fator nas relações de causa e efeito do processo erosivo dos solos, sendo sua caracterização fundamental para o planejamento conservacionista. Este trabalho foi realizado com o objetivo de avaliar a distribuição dos atributos das chuvas (altura precipitada, duração, energia cinética, intensidade máxima em 30 min) e índices de erosividade (EI30 e KE > 25) em relação aos meses do ano e padrões de precipitação pluvial, para uma série de dados pluviográficos referentes à região de Ribeirão das Lajes (RJ). Os dados foram analisados em delineamento inteiramente casualisado em esquema fatorial do tipo 12 (meses) x 3 (padrões), e também, por meio da análise multivariada... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Erosão hídrica EI30 KE >; 25. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000500032 |
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| Camargo,Antonio Pires de; Botrel,Tarlei Arriel; Vieira,Ricardo Godoi; Pinto,Marinaldo Ferreira; Vellame,Lucas Melo. |
| This research introduces the development of an electronic flowmeter based on the drag force that a body experiences when immersed in a fluid stream. Its main goal was the development of an Electronic Drag Force Flowmeter (EDFF) using a load cell, as well as the evaluation of its performance parameters. The developed flowmeter should not require specialized labor, equipments, computers or any sophisticated and complex method, providing an easy and accurate way of flow estimation. This research was carried out in the following stages: (i) EDFF mechanical structure development; (ii) data acquisition system and embedded software design; and (iii) evaluation of EDFF performance parameters. EDFF has routines for instantaneous flow rate measurement, interactive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Technology innovation; Flow measurement; Electronics on agriculture. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300002 |
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| Bueno,Mateus Marques; Leles,Paulo Sérgio Santos; Pinto,Marinaldo Ferreira; Resende,Alexander Silva de; Couto,Beatriz Rodrigues Monteiro; Carvalho,Daniel Fonseca de. |
| ABSTRACT The increase in the demand for seedlings of native tree species makes it important to determine their water and light requirements, which are important factors in their production, in terms of costs and time. Water use and productivity in the growth of seedlings of Dalbergia nigra (Vell.) Allemão ex Benth., Apuleia leiocarpa (Vogel) J.F. Macbr and Hymenaea courbaril L. were determined under four light levels (three shading levels and control), using a randomized block design with four replicates. Height, stem diameter, leaf area and biomass, as well as Dickson quality index (DQI) were evaluated. The seedlings were transplanted into 280-cm3 plugs, filled with substrate composed of pure biosolids, and irrigated by a drip system with automatic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Automatic irrigation management; Biosolid; Jacarandá-da-Bahia; Garapa; Jatobá.. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542021000100207 |
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