---------------------------------------------------------------------------------------- Type of Treatment No. of [Symbol: female]'s at Nut set as time of first expressed in % pollination of [Symbol: female]'s at time of 1st pollination x3 [Symbol: female] parent [Symbol: female] parent 4-4 7-4 4-4 7-4 (JxA) (JxJA) (JxA) (JxJA) ---------------------------------------------------------------------------------------- Normal emasculation 39 17 29.1 13.7 Only unisexual catkins removed 23 19 14.5 0.0 Not emasculated, but pollinated 28 18 25.0 3.7 Not emasculated, } not pollinated } Control 28 25 1.2 0.0 Not bagged, branches tagged, open pollinated 26 23 44.9 17.4 ---------------------------------------------------------------------------------------- Bagging apparently was partly injurious on these two trees and caused some decrease in nut yield. There is, however, no evidence that emasculation in itself causes a decreased nut yield, rather it appears to be somewhat beneficial if we are to judge from the results of this experiment. At least, one would be justified in concluding that any harmful effect is negligible. Completely emasculated flowers yielded 29.1 and 13.7 per cent as compared to 14.5 and 0.0 per cent where only unisexual male catkins were removed, and 25.0 and 3.7 per cent where no emasculation was done. The controls which were not emasculated and not hand pollinated, show that the trees are practically completely self sterile; only an occasional nut is set from self-fertilization. Vegetative Propagation