The Bulletin. 



13 



cent of fine rock fragments in the soil, and occasionally a few granite 

 boulders are strewn upon the surface. 



The subsoil is a yellowish to brownish sandy loam or sticky sand 

 which commonly grades into the disintegrated granite at 20 inches. 

 In some places this soft rock comes to within a few inches of the 

 surface and even outcrops frequently as there is a gradual gradation 

 from the surface soil to the rock. 



AVERAGE CHEMICAL ANALYSIS OF PORTER'S SAND. 



Surface 

 Subsoil ' 



V2 mm. 



Percentage Composition on the Dry 

 Basis. 



Volatile Nitro- 



matter. 



gen. 



Phos- 

 phoric 

 acid. 



2.17 



2.27 



.0375 

 .021 



.008 

 .009 



Potash. 



.67 

 .635 



Lime. 

 CaO. 



1.515 

 1.49 



Pounds of Total Plant Food Con- 

 stituents per Acre. 

 Surface Soil to depth of 6| 



inches, 2,500,000 11)3. 

 Subsoil to depth of 28 inches, 

 10, 000, 000 lbs. 



Nitro- 

 gen. 



501 

 1378 



Phos- J . 



phoric Potash. ^^• 

 acid. ' CaO. 



128 

 590 



10505 

 41696 



I 



26705 

 97840 



PORTER S LOAM. 



The surface soil of the Porter's loam consists of a dark brown, 

 reddish brown, or yellowish brown loam from 6 to 14 inches deep. 

 The surface few inches is darker than the underlying soil on account 

 of the accumulation of vegetable matter, as practically all of the 

 type is forested. Occasionally in local areas where the soil is thinly 

 forested on foothills and ridges small spots of grayish loam occur, 

 and where the granitic rock comes near the surface the sand content 

 is greatly increased. This type is made up of silt, clay and the 

 various grades of sand in about equal proportions, thus giving a mel- 

 low, smooth soil, and one easily cultivated. 



The subsoil to a depth of 3 feet or more varies from a reddish 

 brown or red to yellowish brown clay or clay loam. In some localities 

 where it is influenced by the mica schists the subsoil is deeper red in 

 color and both soil and subsoil contain a considerable amount of mica 

 scales. 



The Porter's loam is the largest and most important type in the 

 Mountain section, being typically developed on the mountain slopes. 



