104 The Bulletin 



those of the Iredell loam ; and fairly well stored with lime. The Iredell, 

 the Congaree and the Mecklenburg series of soils and the Durham sandy 

 loam type in Cabarrus and Caswell counties generally have been found 

 to contain high amounts of lime. Of all of these, the soils of the Iredell 

 series are decidedly richer in this constituent than any other of the soils 

 of the Piedmont Section examined. The amount of nitrogen present in 

 these soils is usually quite small and variable, the quantity present be- 

 ing dependent upon the amount of organic matter contained in the soil. 

 The field experiments which have been made on these soils and pre- 

 sented, in part, in this report, shoAv that potash is not usually needed 

 for the production of good crops, but that phosphoric acid and nitrogen 

 are the most important constituents. The soil analyses and the experi- 

 ments point the way to the proper use of fertilizers for the production 

 of profitable crops in the Piedmont Section, as well as the kind of ferti- 

 lization and rotations to be followed for the permanent improvement of 

 the soils. Phosphates in some form must be used liberally, nitrogen 

 must be supplied either in fertilizers or by growing soil- improving crops, 

 while potash is not generally needed. 



A study of these analyses will prove of interest and value to those 

 who are farming in the Piedmont Section of the State. They are fun- 

 damentally important in connection with a more profitable and progres- 

 sive agriculture for this portion of l^orth Carolina. 



