. Documentary journal of Indiana 1905 . thegap between the two pieces of woods, as indicated by the arrow, haslost all of the crop, while the stand increased toward the woods onthe west and was good at a distance of 10 to 20 rods from them. 228 Fifth Annual Report The piece of oats lying on the south side of the scantily woodedpasture was in excellent condition, and although only 15 rods wide,a very appreciable difference could be seen in the stand of clover, towhich the field had been seeded, on the margin most distant fromthe pasture. Even fields of corn stubble having fields of oats totheir
. Documentary journal of Indiana 1905 . thegap between the two pieces of woods, as indicated by the arrow, haslost all of the crop, while the stand increased toward the woods onthe west and was good at a distance of 10 to 20 rods from them. 228 Fifth Annual Report The piece of oats lying on the south side of the scantily woodedpasture was in excellent condition, and although only 15 rods wide,a very appreciable difference could be seen in the stand of clover, towhich the field had been seeded, on the margin most distant fromthe pasture. Even fields of corn stubble having fields of oats totheir leeward were observed, in three instances, to have exertedvery marked effects upon the stand of grain, and in one of thesefields, on one portion of the protecting corn stubble, there was astrong growth of dock sorrel. To the leeward of this part of thefield the oats had been much less injured, suggesting that the effectof the humidity of the air passing across this may have been enough CFEU FELCB \XDODED P^3T\JRE a - \7 FEET n&\~. \woooe Fig. 3, Showing protection afforded to grain by woodsand direction of destructive winds. altered to render the wind current appreciably less destructive. Ob-servations like these appear to place beyond doubt that, under cer-tain conditions, at least, wind-breaks do exert a very measurableeffect upon the vegetation of cultivated fields. On three other oat fields which had been seeded to clover andwhich were bordered on the west with fields of grass, the numberof clover plants upon unit areas which had survived the effect ofthe wind was determined at different distances from and to theleeward of the fields of grass. The counts were made in seriesalong east and west lines at right angles to the margins of the grassfields, and the results are given in the following table. State Eoaed of Fokestky. 229 TABLE Showing the Decrease in tlie Number of Young Clover Plants Per Unit Area With Increase of Distance to the Deeward of the Margin of Grass Land.
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