1919] Pendleton: A Study of Soil Types 437 



Table 50 — Diablo Clay Adobe, First Crop 



Phaseolus vulgaris 



Planted, April 4, 1916. Harvested, October 7, 1916 



Notes 

 Growth poor and 

 slow through- 

 out 



Diablo clay adobe. Second crop. — The crops used in this plant- 

 ing were milo (two series, one following oats and bur clover, and the 

 other following oats alone), cowpeas, millet, and soy beans. The 

 crop was thinned as follows : milo to eight plants, millet to twelve, 

 soy beans to six, and cow r peas to six. The total dry weight (tables 

 51-55) of the largest leguminous crop in this planting is about one- 

 third of that of the bur clover in the first planting; though the grains 

 are proportionately not nearly so much less than in the first crop. 

 Soil no. 2 has the least pronounced adobe structure, but was the most 

 easily puddled. The plants in one of the pots of soy beans of soil 

 no. 2 were entirely killed by too much water. 



Comparing the relative growth on the soils, the notes made while 

 the crops were growing coincide very closely with the dry weights. 

 As to the relative crop production (fig. 28), it can be said that soils 

 nos. 1 and 5 produced larger crops than soils nos. 2 and 6. Thus the 

 second crop results substantiate those of the first crop. 



