knowledge of physical properties of rice grains is an important tool for designing agricultural machines and other equipment to handle planting, harvesting, processing, packaging and storing. The most common rice genotypes grown in Egypt is 19 rice genotypes (12 rice cultivars and 7 promising lines) but the data on its physical properties is still lacking. The aim of this study is to investigate some engineering properties of 19 rice genotypes which grown in Egypt and set up a database for rice genotypes as well as its use to design Precision agriculture machines at different seed moisture contents for the various manner of direct-seeded rice approaches. Laboratory experiments were carried out during 1st May of 2016 and 2017 seasons at the Farm of Rice Research Department, Field Crops Research Institute, Kafr El-Sheikh Governorate collaborated with Tractor Farm Machinery Test and Research Station - Alex). The rice grains properties of (dry, soaked and incubated for 24 and 48 hours) were tested. The obtained results indicated that the mean values of moisture contents for all rice genotypes were (14.38%,14.81%, 25.67%, 26.02%, 28.98% and 29.37%) for dry, soaked (1day) and incubated (2days) in 2016 and 2017 seasons, respectively. Also, the grain dimensions gradually parallel increased with additional moisture content increased for all rice grains genotypes. From these results, it was clear that the shortest dimensions of rice grains recorded (1.92 ± 0.08 mm) with dry seeds. Herein, it leads to design of the hole diameter for the seed plate less than 1.92 mm for the precision machine. Therefore, the pertinent hole diameter for all rice grains genotypes was 1.5 mm. The results obtained were used to establish a database of all rice cultivars in Egypt to use in the development of direct agriculture machines with a precision farming system and determine the optimum number of grains per unit area according to the technical recommendations for growing rice cultivars.