The Bulletin 33 



Georgeville and the Alamance series are relatively high in phosphoric 

 acid; particularly is this so with the Georgeville Slate Loam and the 

 Georgeville Silty Clay Loam and the Alamance Slate Loam. The 

 Iredell Loam, Congaree Silt Loam, and Alamance Gravelly Silt Loam 

 are much higher in this constituent than are most Piedmont soils. 

 Samples of the original slate that have been examined, from which the 

 Georgeville and Alamance series have been formed, contain 0.151 per 

 cent of phosphoric acid, 0.04 per cent nitrogen, 2.24 per cent potash, 

 and 0.75 per cent lime (CaO). 



In potash content the soils, as of other counties of the Piedmont 

 section of the State examined, are relatively high as compared Avith 

 most of the sandy soils of the eastern portion of the State, Those con- 

 taining this constituent in the largest amounts are Georgeville Slate 

 Loam, Congaree Silt Loam, Alamance Slate Loam, Georgeville Grav- 

 elly Silt Loam, Granville Sandy Loam, Wehadkee Silt Loam, Cecil 

 Clay Loam, and Georgeville Silt Loam. Those containing the smallest 

 amounts of this constituent of plant food are Durham Sandy Loam, 

 Cecil Sandy Loam, Cecil Fine Sandy Loam, Iredell Loam, Alamance 

 Gravelly Silt Loam, Georgeville Silt Clay Loam, xllamance Silt Loam, 

 and Durham Fine Sandy Loam. 



In lime (CaO) content the Iredell Loam is much higher than any 

 of the other soils occurring in the county, it containing a little more 

 than 2Y2 per cent of this constituent, while the others range from 

 0.1272 in the Alamance Silt Loam to 0.424 in the Congaree Silt Loam 

 and 0.75 in the pure slate from which the Alamance and Georgeville 

 series of soils are largely formed. In addition to the Iredell Loam 

 and Congaree Silt Loam, other soils containing lime in largest amounts 

 are Alamance Gravelly Silt Loam, Alamance Slate Loam, Georgeville 

 Silty Clay Loam, Wehadkee Silt Loam, Georgeville Silt Loam, and 

 Georgeville Slate Loam. Those lowest in lime content are Durham 

 Fine Sandy Loam, Alamance Silt Loam, Cecil Sandy Loam, Cecil Fine 

 Sandy Loam, Cecil Clay Loam, Granville Sandy Loam, Durham Sandy 

 Loam, and Georgeville Gravelly Silt Loam. It is believed the most of 

 the lime in these soils is not in a form favorable for correcting of soil 

 acidity. 



WHAT EXPERIMENTS HAVE SHOWN TO BE THE CHIEF NEEDS OF THE SOILS. 



The results of field experiments that have been conducted for a 

 number of years in this county on the Alamance Silt Loam, in Gaston 

 County on the Cecil Sandy Loam, in Mecklenburg County on Cecil 

 Clay and Iredell Loam, and in Iredell County on Cecil Clay Loam 

 have shoTvai as an average of many trials that, generally speaking, 

 nitrogen and phosphoric acid are the plant-food constituents chiefly 

 needed by most of the types of soil, at least, occurring in the county. 



3 



