POT EXPERIMENTS WITH FERTILIZERS. Baia)’ 
advantage was obtained from the use of nitrogen in the fertil- 
izers, either in the total yields or in the percentage of nitrogen. 
TABLE 52. 
Nitrogen in fertilizer and in crop in pot experiments with soy 
bean seed, T900. 














_ FERTILIZER. 2. 
Fh abba Wk: 
. 1 eel Tee 
Zz |e £3| Sl oye pel laet 
s |x SAMPLE. Z ie "ox = Ay 
Ss |S Kind. % Bele 3 bye 
ake ° Gane 
g6[5| 
Gms/|Gs| % |Gm| % 
6346|49| Soy bean seed, | Minerals only, - - - | — |11/6.45).71/ 40.31 
6347|50| Soy bean seed, | Minerals only, - - — |11|6.57).72) 41.06 
6348|51| Soy bean seed, | Minerals only, - - — |10/6.07 .60} 37.93 
6349|52| Soy bean seed, | Minerals only, - - — |12/6.51|.78| 40.69 
Average, - 11/6.40 .70) 40.00 
6350/53) Soy bean seed, | Minerals + } nit. ration, - 3.08/10 6.13] .61) 38.31 
6351|54| Soy bean seed, | Minerals + $ nit, ration, - 3.08|14/6.44) .90) 40.25 
6352|55| Soy bean seed, | Minerals + 4 nit. ration, - |3.08/14 6.43) .90| 40.18 
6353|56| Soy bean seed, | Minerals + $ nit. ration, - 3 .08/14|6. 12) .86) 38.25 
Average, - 13/6.28 .82) 39.25 
6354|57| Soy bean seed, | Minerals + } nit. ration, - |6.16|12|6.02).72/ 37.63 
6355/58| Soy bean seed, Minerals + } nit. ration, - |6.16)14/6.24) .87| 39.00 
635659 Soy bean seed, | Minerals + $ nit. ration, - [6.16/14 6.42) .90}] 40.13 
6357\60| Soy bean seed, | Minerals + $ nit. ration, - 6.16/13|6.50 .85 40.63 
Average, - 13/6.30 .84/39.35 
6358|61) Soy bean seed, | Minerals + full nit. ration, |g.24|12 6437) 76) 30.88 
635962) Soy bean seed, | Minerals + full nit. ration, |9.24/13/6.45|.84| 40.32 
6360163) Soy bean seed, | Minerals + full nit. ration, |9.24|13 6.30) .82] 39.38 
6361/64) Soy bean seed, | Minerals + full nit. ration, |g.24/13/6.08).79| 38.00 
Average, - 13'6.30 .80/ 39.38 


EXPERIMENTS REPEATED ON SAME SOIL. 
A number of attempts were made to use the soil of one year 
in experiments of the next year, by simply applying to the 
soil the same quantity of fertilizer that had been put in when 
first prepared. For the most part these were failures. The 
soil in pots 1 to 12, used for oats in 1898, was thus treated, 
and planted again with oats in 1899, but the growth of oats 
was not normal, and the crop was discarded. In 1900 clover 
was planted in the soil that had thus been used for oats for 
two years, but the results were unsatisfactory. Similar results 
were also obtained in 1900 in an attempt to grow timothy grass 
