128 SOIL SCIENCE [Bot. Absts. 



with one or few samples would be untrustworthy. Data are presented showing that the 

 making of a composite sample is justified after the variations in the area are known. The 

 advantages of estimating the number of samples necessary to Secure any degree of accuracy 

 are discussed. From such an estimation it becomes possible to sample field soils in a definite 

 manner and to avoid needless work in securing an unnecessarily large number of samples. — 

 H. S. Reed. 



871. Wiancko, A. T., S. D. Conner, and S. C. Jones. The value of legumes on 

 Indiana soils. Indiana (Purdue) Agric. Exp. Sta. Bull. 226. 20 p., fig. 1-6. 1919.— See 

 Bot. Absts. 3, Entry 488. 



