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[en] The radiometric relations of a sugarcane crop, cv. NA56-79, are studied during the period of maximum leaf area index. The coefficients of reflection, transmission and absorption of the incoming solar radiation were function of solar elevation and the waveband considered. The photosynthetically active radiation was always less reflected and transmitted but more absorved than the near infrared radiation. (M.A.C.)
[pt]
Estudam-se as relacoes radiometricas numa cultura de cana-de-acucar, cv. NA56-79, no periodo de maximo indice de area foliar. Relata-se que os coeficientes de reflexao, transmissao e absorcao da radiacao solar incidente variaram em funcao do angulo de incidencia dos raios solares e da faixa espectral considerada. Constata-se que a radiacao fotossinteticamente ativa foi sempre menos refletida e transmitida e mais absorvida que a radiacao do infravermelho proximo. (M.A.C.)Journal
Bragantia; ISSN 0006-8705; 
; v. 44(1); p. 229-238
; v. 44(1); p. 229-238