orts that listed set out windbreaks, it was found that
fifty-seven growers had used evergreens, thirty-seven willows,
twenty-nine box elders, twenty-five maples, seventeen cottonwoods,
thirteen ashes, eleven elms, eight poplars, four oaks, four plums, three
nuts and one apple. The evergreens consisted of thirteen Scotch pine,
eleven evergreens (not named), eight Norway spruce, five spruce (not
named), three balsam, three Austrian pine, two white pine, one yellow
pine, two cedar, two white spruce, two pine (variety not named), two
fir, two jack pine, one Black Hills spruce, and one tamarack. In the
willows were given twenty willows (variety not named), two
laurel-leaved, seven white and eight golden; in the maples, sixteen soft
maples, two hard maples, one silver-maple and six maples (kind not
named); in the poplars, five Norway, one Carolina, two poplar (kind not
named); and in the nuts, one black walnut, one butternut and one walnut.
The major part of the box elders, cottonwoods, willows and ashes were
noted in the central west and southwest sections. Thirty-seven
experienced growers of windbreaks, the most of them living in the
southwest, west central and southeast sections, recommended the
following trees for windbreaks in the given proportions, twenty-four
evergreens, fifteen willows, seven maples, six poplars, five elms, five
box elders, three elms, two plum, two cottonwood, three hedges, one oak,
one hackberry and one black walnut. The evergreens are decidedly the
most popular, and among the varieties mentioned Norway spruce takes the
lead for those recommended, and the Scotch pine for those planted.

There are about as many different systems of planting used as growers.
The main point in all cases was to have a planting that would stop the
wind and storms. A few growers advocated the use of a hedge or plum
trees to fill in under the windbreak, while one grower desires a
circulation of air under the branches of his trees. Cultivation and
intercropping of windbreaks are also recommended in a few cases. The
distance of planting varies, of course, with the trees or shrubs used.
For example: one grower recommends 8 ft. x 8 ft. for large deciduous
trees, and another grower, 6 ft. x 12 ft. apart in rows and two rows, 12
ft. apart. For Scotch pine one grower advocates eight feet. In some
cases a mixture of many kinds of trees is recommended, and then again
only one kind. One very solid windbreak is made up of a lilac hedg