. Bulletin. 1901-13. Agriculture; Agriculture. PLANTING, TRAINING, AND PRUNING. 77. quently these two kinds of blossoms (staminate and pistillate) do not mature at the same time upon the same tree, or one or the other of them is infertile because of imperfect development: such tree, if b}' itself, is unpro- ductive. The Los Angeles or Mission walnut, when plant- ed in the northwest- ern Pacific region, persistently fails to fruit for one or other of these rea- sons, though occa- sionally failure is chargeable to late frosts. To insure com- plete fertilization care should be ex- ercised in the
. Bulletin. 1901-13. Agriculture; Agriculture. PLANTING, TRAINING, AND PRUNING. 77. quently these two kinds of blossoms (staminate and pistillate) do not mature at the same time upon the same tree, or one or the other of them is infertile because of imperfect development: such tree, if b}' itself, is unpro- ductive. The Los Angeles or Mission walnut, when plant- ed in the northwest- ern Pacific region, persistently fails to fruit for one or other of these rea- sons, though occa- sionally failure is chargeable to late frosts. To insure com- plete fertilization care should be ex- ercised in the selec- tion of varieties. Where little definite information about pollination and fer- tilization is avail- able it is safe to l^lant tAvo or more varieties which blos- som at the same time. In some in- stances of sh}' bear- ing it may be de- sirable to introduce a variet}^ rich in pollen, regardless of the character of its nuts, in order to amply fertilize the blossoms of the more valuable va- rieties. To insure effective pollination one tree in seven when planted in quincunx and one in six when planted in squares is deemed sufficient, except possibly where prevail- ing Avinds are strong and persistent from one direction. Manv. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Washington Govt. Print. Off
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