natural timber, two by natural and planted timber, and nineteen by planted windbreaks; in the northeast section, two by natural and four by planted windbreaks; in the northwest section, three by natural and two by planted windbreaks; in the west central section, one by a hill and natural timber, five by natural timber, two by natural timber and planted windbreaks, and eighteen by planted windbreaks; and in the southwest section, one by a hill and natural woods, one by a hill and planted windbreak, two by natural timber, and fifteen by planted windbreaks.  If Meeker County, which has natural timber, was not included in the central west—­and perhaps it should have been included in central east—­this section would have only one orchard protected alone by natural timber; and if Blue Earth County was eliminated from the southwest, this section would have no orchard protected alone by natural timber.

The beneficial effects from windbreaks may be summed up as follows:  Twenty-five reported that they prevented fruit from being blown off trees, nine that they prevented trees and limbs being broken by winds and storms, ten that they protected trees from injury by winds without specifying the kind of injury, four that they reduced injury from frosts, ten that they either prevented or reduced winter injury, four that they helped to retain moisture, five that they helped to hold snow, eight that they prevented snow drifting, five that they protected orchards from hot and dry winds, three that they permitted the growing of apples, and one that they supplied all advantages.

The kinds of trees recommended for windbreaks and the methods of planting are numerous and variable and to discuss them at length would take too much time.  However, the principal facts may be briefly enumerated.

In eighty-five reports 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