The research work was carried out at Experimental Farm of Rice Research and Training Center (RRTC), Sakha, Kafr EL-Sheikh Egypt, during two successive rice seasons 2014 and 2015 to study the behaviour of nine tested genotypes which differs mainly in their growth duration and relationship between growth duration and cropping intensification in Egypt. Also, to study the performance of some Egyptian rice varieties for some agronomical and physiological traits. Analysis of variance indicated that genotypes under study were significantly different in all studied traits. Based on days to heading, data obtained revealed that short durations rice varieties such as Sakha105 and Sakha102 could be a pertinent use for cropping intensification and ensured a third crop with a short duration period like vegetable crops or save the area after rice to raise onion seedlings which are grown in 1.5 months.