Читать книгу Manual of American Grape-Growing - U. P. Hedrick - Страница 83

Vineyards are laid out for the most part after accepted patterns for each of the great grape regions of America. The vines are always planted in rectangles, usually at a less distance apart in the rows than the rows are from each other, but sometimes in squares. Pride in appearance and convenience in vineyard operations make perfect alignment imperative. Many varieties of grapes, especially of American species, are partially self-sterile, so that some varieties must have others interplanted with them for cross-pollination. This is usually done by setting alternate rows of the variety to be pollinated and the cross-pollinator. All self-fertile varieties are set in solid blocks because of convenience in harvesting.