244 



Journal of Agricultural Research 



Vol. III. No. 3 



ties. In all cases where two or more varieties are averaged the direction 

 of the soil effect was the same for each of the varieties, though the extent 

 of this effect was not the same. 



Table XI. — Oil content and related data of soy beans and peanuts grown on different soil 



types 



Locality, conditions under 

 which groiiSTi, and kind of 

 ■ soil. 



Thompsons Mills, Ga.: 

 Field experiment — 



Gray land 



Red land 



Arlington, Va.: 

 Field experiment — 



ArUngton clay 



Potomac Flats 



Greenhouse experiment — 



Arlinpton clay 



Potomac Flats sand 



Pot experiments, Series I. 



1911 — 



Arlington clay 



Norfolk fine sandy loam. . . 

 Pot experinaents. Series I. 



191 2 — 



Arlington clay, 



Norfolk fine sandy loam. . . 



Potomac Flats sand 



Pot experiments, Series II, 

 1912 — 



Arlington clay 



Hartford fine sandy loam. . 

 Manning, S. C: 

 Pot experiments, Series I, 



IQIl — ■ 



Arlington clay 



Norfolk fine sandy loam.. . 

 Pot experiments. Series I, 

 191 2— 



Arlington clay 



Norfolk fine sandy loam, , , 



Soy beans. 



^^ 



Cm. 



2,450.0 

 301-0 



325.0 

 351-0 



go.8. o 

 6io-o 

 682.0 



326.0 



sg 



si 



S.9II0 

 636.0 



856.0 



561.0 



34-5 

 70.8 



687.0 

 562.0 

 416.0 



230. o 

 485. 6 



57-6 

 64.8 



Gm. 



144.4 

 136-3 



186.0 

 130.9 



184. 1 

 169.3 



SS.o 

 65.3 



89. 6 



88.7 



132.6 

 145-1 



95- I 



87-7 



9.1.1 

 96.3 



P.ct. 



4-41 



4. 20 



6.02 

 6. 10 



4.90 

 5.10 



7.02 

 7.62 

 7-36 



5- 10 

 5- OS 



6.45 

 6. 50 



.a 



5 



P.ci. 



20.44 

 21.68 



19.85 

 21.00 



19.88 

 19-5 = 



17-44 

 16.62 



18.55 

 15-3^ 

 14.89 



16.57 

 15.23 



16.76 

 16. 50 



16.69 

 16.83 



Gm. 

 29-5 

 29.5 



36.9 

 37-5 



36.6 

 33-0 



9.6 

 10.8 



16.0 

 MS 



15.7 

 16. 2 



Gm. 

 S53-I 

 S40.7 



356.0 

 411. o 



470.0 

 511.0 



478.0 

 509.0 

 473-0 



465.5 

 480.5 



377.4 

 365.8 



P.cl. 



3-07 

 2.80 



3.90 

 3-45 

 4-15 



3-66 

 3-73 



P.cl. 



47-25 

 50.70 



47. 85 

 47-54 



SI- 58 

 49-16 



50.25 

 46.07 

 46. 12 



49-97 

 49.80 



47-62 

 47.04 



Gm. 

 261.6 

 274-3 



170.5 

 168.6 



242. 5 

 251.4 



240.4 

 234.6 

 218.1 



233-0 

 239- 5 



179- S 

 172.0 



These tests include a wide range of soil types and climatic conditions, 

 and the results as a whole emphasize the fact that the relative effects 

 of different soil types are not specific and constant but depend largely 

 on seasonal conditions, as was brought out in the experiments with cotton. 

 The results in the field experiment at Arlington Farm as compared with 

 those obtained in the greenhouse with the same soils illustrate this point. 

 In the field test the plants suffered considerably from drought during the 

 growing season, and here the sandy soil gave decidedly smaller beans and 

 higher relative oil content than the clay soil. In the greenhouse the 

 difference in size of beans largely disappeared, while the clay loam gave 

 a somewhat higher percentage of oil than the sandy soil. In the pot 

 experiments at Arlington Farm the lighter soils gave somewhat larger 

 seed with lower percentages of oil than the heavier clay soil, but at 

 Manning, S. C, there were no significant differences. 



