— 122 — It will be seen that a medium watering favours length, although in 1915 the cotton from the heavily-watered plots was on the whole more even.

It remains to consider the efEect of a varying interval of time between the individual waterings. If the evaporation and temperature figures given in Report I are compared with those recorded for Cairo, the comparative frequency of the watering in the Sudan will not appear strange. A full set of figures is given for 1915, and the means of the first picking for 1914.

Effect of Varying Intervals in Watering on the Length of the Cotton Fibre, Sakel, 1915.

10 Days' Interval.