246 



EX PERIMENTA L FA RMS. 



Fig. 3. — Hierochloa borealis, R. & S. 



The sweet grass ripening early, generally sheds its seed before summer-fallows 

 are ploughed and the one ploughing usually given summer-fallow here covers this 

 seed, and spreads the root stocks over the field, the smallest piece of which will 

 grow and become a centre of distribution another year. 



Last spring four one-tenth acre plots badly infested with the sweet grass were 

 set apart for experimental work. 



All were ploughed May 28th. 



Plot 1, was at once sown with three bushels of barley per acre, and the crop 

 allowed to ripen. 



Plot 2, also sown, but with oats, and the crop allowed to ripen. 



Plot 3, was summer-fallowed by ploughing once and the weeds kept down with 

 surface cultivation. 



Plot 4, also summer-fallowed but ploughed twice and couch grass roots brought 

 to the surface by harrowing. 



Very little sweet grass is left in Plots 1 and 2, and none whatever can be seen 

 in Plot 4, twice ploughed ; but in Plot 3, ploughed but once, the grass appears thicker 

 than ever. 



These plots will be kept in view and their condition reported on next year. 



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