The coefficient of velocity Cv where obtain by using Vo where Cv is V / Vo.

Figure 4 show the coefficient of velocity Cv, data against the point inside the diffuser (Xo) over the distance between the 2 diffuser (D).

Coefficient of velocity of germination (CVG), germination index (GI), germination rate index (GRI), mean germination time (MGT), final germination percentage (FGP), germination rate (Rs) and mean daily germination (MDG) were calculated using the following formula [7]:

1) The coefficient of velocity of germination (CVG): [summation]NiTi / [summation]Ni x 100 = CVG

Coefficient of velocity of germination (CVG) indices evaluates drought stress tolerance.

In this experiment, Coefficient of Velocity of Germination (CVG), Germination Rate Index (GRI), Final Germination Percent (FGP) and Germination Index (GI) were calculated for method of AL-Mudaris [3].