27 



Table Xll: Effect of "wetdB" Growing in Corn on the 



Total salts and HOg Content of th® Soil. 



Series I, Corn with Rye Series II 



Corn with 



?v:illet 



No. Treatment Total salts Total salts NOg ppm NOo ppjs 

 Plat ppm June 27 ppm Aug, 25 Aug? 26 Aug. 8 



1 Cultivated, 



no "weeds" 600 



2 ^) "Weeds" sown 



June 14 644 



3 ''^^Weeds" sown 



June 27 55/ 



4 Cultivated, 



no "weeds" 519 



(h) "Weeds" refer to rye and millet respectively. 

 The total gaits show a decrease on Aug. 25 as eoiapared 

 with June 27. in plats 9L and 3 whe/tewseds grew the reduc- 

 tion was much aore marked than on the checks, and of these 

 more marked where the weeds were sown earlier in the season. 

 Whether the essential eiteiaentfi varied to correspond with the 

 total salts is a matter of conjecture. But the variation 

 of the HOg due to "weeds" was very marked. The variation 

 between the check plats is also great, due doubtless in a 

 large measure to being taken at different dates. There 

 •as further a great difference in the NOg in the check 

 plats, Aug. 8. 



