2004
DOI: 10.4067/s0365-28072004000100005
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Evaluación De Un Modelo Para Estimar La Radiación Neta Sobre Un Cultivo De Tomate Industrial

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Cited by 5 publications
(6 citation statements)
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“…Also, MD and RMSE values were less than 0.08 and 0.28 mm d -1 , respectively. These results are similar to those reported by Ortega-Farías et al (2004a) for a field tomato crop (RMSE = 0.24 mm d -1 and ARE = 4.1%). Figure 4a indicates most of the points were close to 1:1 line indicating that estimated and observed values were similar.…”
Section: Interior Solar Radiationsupporting
confidence: 81%
“…Also, MD and RMSE values were less than 0.08 and 0.28 mm d -1 , respectively. These results are similar to those reported by Ortega-Farías et al (2004a) for a field tomato crop (RMSE = 0.24 mm d -1 and ARE = 4.1%). Figure 4a indicates most of the points were close to 1:1 line indicating that estimated and observed values were similar.…”
Section: Interior Solar Radiationsupporting
confidence: 81%
“…Nota-se que a fração de radiação solar global transformada em energia disponível ao sistema, ou seja, o saldo de radiação (Figura 1D), apresenta distribuição regular e valor médio de 0,5819 ± 0,08, alcançando valor máximo de 0,70, ocorrido na fase de frutificação aos 45 dias após o transplantio, sendo que os menores valores ocorreram nos primeiros dias do experimento no ambiente protegido. Ortega-Farías et al (2004) afirmam que o saldo de radiação (Rn) disponível é a força principal na determinação das perdas de água de uma cobertura vegetal quando a água no solo não é limitante.…”
Section: Resultsunclassified
“…In this case, the S-W model requires an adequate parameterization of the energy balance of the vineyard, where net radiation (Rn) is the main component that provides the energy needed for soil evaporation, transpiration and heat transference among the canopy, soil surface and air. Unfortunately, most of the AMS found in the market do not measure Rn directly, therefore, it must be calculated by physical models which use solar radiation (Rsi), air temperature (Ta), canopy temperature (Tf) and relative humidity (RH) as inputs (Iziomon et al, 2000;Irmak et al, 2003;Ortega-Farías et al, 2004).…”
Section: Introductionmentioning
confidence: 99%
“…The value of ε f is relatively constant and an average value of 0.98 is employed in many agricultural applications (Allen et al, 1998). The value of ε a , which depends on the type of cloud, cloud cover degree, atmospheric humidity and air temperature, can be calculated as (Ortega-Farías et al, 2004):…”
Section: Introductionmentioning
confidence: 99%