444 University of California Publications in Agricultural Sciences [Vol. 3 



one pot of each triplicate set would have 8 plants, the second of the 

 set 12 plants, and the last 16 plants. It was found that the wide 

 variation in the number of plants had but little effect upon the dry 

 weight produced per pot (tables 61-66). The effect was indeed so 

 slight that the totals were averaged up as usual. Figure 30 shows 

 distinctly that there was very little variation as regards total produc- 

 tion among these soils, so little as not to warrant any conclusions as 

 regards substantiation of, or disagreement with, the first crop. It 

 will be noticed in the second crop of the Diablo series, as well as in 

 that of the Altamont series, that the maintenance of the soils under 

 the same conditions for a year or more seems to bring them quite 

 rapidly to an average crop producing power. 



Table 61 — Altamont Clay Loam, Second Crop 



Milo A (following wheat) 



Planted, August 10, 1916. Harvested, November 17, 1916 



Straw Grain Total dry matter 



a . a • . y. . 



r \ r \ t \ 



No. Average Average Average 



Pot plants Weight weight Weight weight Weight weight Notes 



3-1 8 0.77 0.77 



3-2 12 1.01 1.01 



3-3 16 0.97 0.92 0.97 0.92 



4-1 8 1.22 1.22 



4-2 12 2.32 2.32 



4-3 16 2.08 1.87 2.08 1.87 



7-1 8 0.59 0.59 



7-2 12 0.99 1.29 



7-3 16 1.29 0.95 1.29 0.95 



Table 62 — Altamont Clay Loam, Second Crop 



Milo B 



Planted, August 10, 1916. Harvested, November 15, 1916 



Notes 



