FIG. 8. POTASH (EXPERIMENT NO. 302). Taken in winter when growth is not vigorous, nevertheless the photo shows the enormous improvement caused by potash. – As the white clover assumes charge the previously stunted and inconspicuous rye-grass grows vigorously, poorproducing grasses and weeds, such as hair-grass, catsear, and lamb's tongue, disappear. The better grasses appear more prominently in the sward, because they grow better, and in tillering occupy wider territory. ' Note the prominence of rye-grass and elimination of hairy flat weeds and Lotus major, and almost complete eradication of rib-grass., Sweet vernal is still present, but suckling clover, which . was prominent shortly after : the application of the potash, has almost entirely disappeared. . [Photo by H. Drake.

New Zealand Journal of Agriculture, Volume 54, Issue 1, 20 January 1937, Page 12

FIG. 8. POTASH (EXPERIMENT NO. 302). Taken in winter when growth is not vigorous, nevertheless the photo shows the enormous improvement caused by potash. - As the white clover assumes charge the previously stunted and inconspicuous rye-grass grows vigorously, poorproducing grasses and weeds, such as hair-grass, catsear, and lamb's tongue, disappear. The better grasses appear more prominently in the sward, because they grow better, and in tillering occupy wider territory. ' Note the prominence of rye-grass and elimination of hairy flat weeds and Lotus major, and almost complete eradication of rib-grass., Sweet vernal is still present, but suckling clover, which . was prominent shortly after : the application of the potash, has almost entirely disappeared. . [Photo by H. Drake.