52 



T. Lyttleton Lyon and James A. Bizzell 



TABLE 18 (concluded) 



Average of first and second eight inches 



Plat 



CO 



IM 



O 



B 



03 



o 



a 

 < 



a 



29.3 



23.8 



30.3 



23.5 



29.4 



23.3 



29.6 



23.6 



27.1 



21.2 



29.9 



22.3 



29.3 



20.6 



29.1 



20.6 



28.7 



20.0 



29.0 



20.3 



29.3 



19.8 



30.0 



21.1 



29.4 



18.0 



29.4 



18.8 



29.3 



15.3 



29.3 



19.2 



O 



IM 



O 



00 



3 S 



o 



Xl o 



3 



< 



4^ 



< 



Is 



.20 



ft 



o 



CD 



20.1 



23.1 



20.6 



25.3 



22.1 



25.9 



20.5 



25.8 



16.9 



17.4 



21.4 



20.7 



19.6 



20.2 



23.2 



22.0 



15.9 



16.4 



18.9 



21.4 



19.1 



19.5 



22.0 



23.0 



17.5 



18.2 



24.1 



21.0 



19.6 



19.6 



23.8 



21.5 



18.0 



18.2 



23.8 



20.4 



18.8 



18.7 



24.7 



20.8 



15.4 



15.4 



23.2 



19.8 



18.8 



17.7 



24.3 



20.6 



11.6 



12.6 



20.9 



23.5 



16.9 



16.1 



22.4 



23.7 



11.7 



13.7 



22.3 



21.7 



17.3 



16.7 



23.4 



22.3 



2201, 2209 

 2401, 2409 

 2201, 2209 



2401, 2409 

 2202, 2210 

 2402, 2410 

 2202, 2210 



2402, 2410 

 2203,2211 



2403, 2411 

 2203,2211 

 2403,2411 

 2204, 2212 

 2404, 2412 

 2204, 2212 

 2404, 2412 

 2205, 2213 

 2405, 2413 



2205, 2213 



2405, 2413 

 2206, 2214 



2406, 2414 



2206, 2214 

 2406, 2414 



2207, 2215 



2407, 2415 



2207, 2215 



2407, 2415 



2208, 2216 



2408, 2416 

 2208, 2216 

 2408, 2416 



Maize, mulched 



None 



Maize, scraped 



None 



Maize, cultivated 



None 



Maize, harvested August 1 . . . . 



None 



Maize, planted June 26, har- 

 vested August 1 



None 



Potatoes 



None 



Oats 



None 



Oats, followed by maize 



None 



20.9 

 21.8 

 16.4 

 16.8 

 21.9 

 23.7 

 21.8 

 22.9 



21.7 

 22.7 



19.8 



22.8 



9.0 

 16.4 



9.6 

 16.9 



25.5 

 26.1 

 24.5 

 25.8 

 23.7 

 24.2 

 24.2 

 24.1 



24.3 

 24.9 



23.7 



24.5 



22.8 



23.3 



24.2 



23.8 



There is no material lowering of the moisture content of the maize 

 plats as compared with that of the unplantedsoil. In the oat soil the mois- 

 ture content is markedly lower, as compared with the unplanted soil, 

 in July and August. The nitrate content does not appear to be greatly 

 influenced thereby, as the nitrates during June are slightly lower than in 

 July and August. As has been noted in previous years there appears 

 to be no definite relation in this soil between the nitrate content of the 

 soil under plants and the soil moisture, owing possibly to the fact that the 

 soil was not at any time seriously depleted of moisture. 



A comparison of the nitrates in the planted sections of the plats in 

 terms of the nitrates in the unplanted sections, taking the latter in each 

 case as 100, will serve to express more clearly the relation of the different 



