8 BULLETIN 677, U. S. DEPARTMENT OF AGRICULTURE. 
Keyport series—The surface soils of the Keyport series are 
grayish brown to brown in color and the subsoils are yellow and 
friable to mottled drab and yellow and somewhat plastic in the 
deeper subsoil. The surface soils are usually well drained, but arti- 
ficial underdrainage is frequently needed on the heavier types. The 
souls of this series are of limited extent, occurring chiefly around 
Raritan Bay. The Keyport sandy loam, fine sandy loam, loam, and 
clay loam have been mapped. 
Shrewsbury series—The surface soils of the Shrewsbury series 
are gray to grayish brown in color and the subsoils are mottled gray, 
yellow, drab, and green. The series is chiefly found in low areas and 
slight depressions, and the deeper subsoils usually contain an ap- 
preciable quantity of greensand. The Shrewsbury sandy loam, fine 
sandy loam, loam, and silt loam have been mapped. 
_ Leansburg sevies—The surface soils of the types in the Keansburg 
series are dark gray to black and well supplied with organic matter. 
The subsoils are mottled gray, drab, and yellow and marked with 
reddish iron stains. The presence of greensand can sometimes be 
distinguished. The soils of this series occupy depressed, poorly 
drained areas in the mar] belt and require artificial drainage to be- 
come of agricultural value. The Keansburg sand, sandy loam, fine 
sandy loam, and loam have been mapped. 
Elkton series —The surface soils of the Elkton series are ashy gray 
to brownish gray in color, and the subsoils are pale yellow, becoming 
mottled yellow and gray at lower depths. They are usually asso- 
ciated with soils of the Sassafras series, occupying flat or depressed 
areas where drainage is imperfect. Only the Elkton loam has been 
mapped. 
Portsmouth series—The surface soils of the Portsmouth series 
are dark gray to black in color and well supphed with organic matter. 
The subsoils are pale gray to nearly white, sometimes faintly mottled 
with yellow. These soils occupy depressed and poorly drained areas, 
chiefly along streamways and around the headwaters of swampy 
streams. They are chiefly forested and require artificial drainage 
before they are available for agricultural use. The Portsmouth 
sandy loam and loam have been mapped in southern New Jersey. 
Hyde series—The soils of the Hyde series are characterized by 
their naturally poor drainage and by the black color of both soil and 
subsoil to a depth of 3 feet or more. They are high in organic mat- 
ter. They occupy low-lying and depressed areas along streams, 
around stream heads, and in swampy upland positions. They must 
be artificially drained before they can be cropped. Only the Hyde 
loamy sand has been mapped in southern New Jersey. 
Freneau series—The surface soils of the types included in the 
Freneau series are dark brown or mottled brown and reddish brown 
