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



Table 66 — Altamont Clay Loam, Second Crop 



Soy Beans (following Phaseolus) 



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



Straw Grain Total dry matter 



. A . , A A 



r \ i \ i \ 



No. Average Average Average 



Pot plants Weight weight Weight weight Weight weight Notes 



3-1 6 5.64 5.64 



3-2 6 4.94 4.94 



3-3 6 4.84 5.14 4.84 5.14 



4-1 6 4.74 4.74 



4-2 6 4.64 4.64 



4-3 6 4.71 4.70 4.71 4.70 



7-1 6 5.25 5.25 



7-2 6 3.28 3.28 



7-3 6 4.39 4.31 4.39 4.31 



Hanford fine sandy loam. First crop. — This soil type, with sam- 

 ples from nine different localities in California, gave a much wider 

 range of conditions and made a much more interesting series. The 

 plants used as indicators in this series were milo (twice), millet, cow- 

 peas (twice), and soy beans. The milo was thinned to eight plants 

 per pot, the millet to twelve plants, and the cowpeas and soy beans 

 to six plants. Set A of cowpeas, and set B of milo were unfavorably 

 located, so that the results of these sets should be discounted. 



It is interesting to note the large differences in the average 

 weights from soil to soil (tables 67-72, and fig. 31), as compared with 

 the photographs, in which little variation appears. See especially the 

 soy bean series. In this series two things are to be noted : 



1. Averages on soils nos. 15 and 25 are hardly representative be- 

 cause in both cases excess moisture, from a leaky roof and too heavy 

 watering, depressed growth. The tendency to become compact and to 

 remain wet and cold shown by soil no. 15 aided the milo and depressed 

 the soy beans. 



2. The loose, open texture of soil no. 22 seemingly favored the soy 

 bean growth, though the other plants did not do as well on this soil 

 as on most of the others. 



