54. BULLETIN 677, U. S. DEPARTMENT OF AGRICULTURE. 
forms of use. The other general farm crops are grown in well- 
balanced rotation with them. | 
The Sassafras sandy loam is the only type of any extent upon 
which the general farm crops occur in area greater than the standard 
for all types. Even on this type the truck crops exceed the general 
farm crops in importance. As in the Thorofare area it is evident 
that this type is suited to a wide range of crop uses. The fact that 
a relatively small acreage of asparagus is grown on the Sassafras 
sandy loam should also be observed. The deeper sandy soils are 
preferred for that crop as at Thorofare. 
The Colts Neck loamy sandy is third in area of the types mapped. 
Its use for truck crops is distinct, since they occupy 65 per cent of 
its area. The local preference for this soil for sweet potato growing 
is also well indicated by the map, 25 per cent of its area being given 
to that crop. It is also an important soil for growing asparagus 
and tomatoes. : 
The Collington fine sandy loam occupies but 5 per cent of the total 
area of the survey, but is very thoroughly brought under cultivation. 
Sweet potatoes, tomatoes, and asparagus are the chief truck crops 
grown upon it, while corn is the only important general farm crop. 
The other soil types mapped in the Swedesboro area are relatively 
of unimportant extent. It is seen that the more sandy soils are 
chiefly utilized for truck-crop production, while those of heavier 
texture or those whose natural drainage conditions are not good are 
chiefly occupied by general farm crops, and that in some instances 
forest and pasture land dominate. It should be stated that the small 
area mapped as Sassafras loam is scarcely typical, since it occurs in 
two small depressions where loamy wash from the upland soils has 
accumulated. It is only used for pasture and for hay growing. 
The facts shown by the Swedesboro map will justify the assertion 
that the presence of suitable sandy or sandy loam soils, even at 
some distance from city markets, results in southern New Jersey 
in the adoption of farm practices which strongly tend toward truck- 
crop production. 
COMPARISON OF THE DETAILED AREAS. 
The four areas for which these detailed soil and crop maps were 
made were selected primarily to secure a representative condition of 
cropping for each of the more extensive and important soils found 
in southern New Jersey. It was also found to be possible to locate 
them in such a manner that contrasts between important soil types 
and their influence upon cropping and agricultural practice were 
possible. Thus, the Freehold and Sweedesboro areas may easily 
be contrasted and the Hartford and Thorofare areas form a couple 
well suited to the study of the influence of soil upon crop practices. 

