70 BULLETIN 671, U. S. DEPARTMENT OF AGRICULTURE. 
present or to place the crop where small depressions accumulate 
seepage waters from higher lying areas of sandy loam. Unless the 
land is actually flooded, the cabbage crop makes good growth upon 
these moist lands. 
COMPARISON OF EXPRESSED PREFERENCE WITH RESULTS OF | 
DETAILED SURVEYS. : 
A general comparison may be made between the facts as observed 
in the four detailed areas where distinct soil types and their crop 
areas were mapped and the preferences as expressed by southern 
New Jersey farmers as summarized and tabulated. The two sets 
of results are presented in detail in Tables XI, XII, and XIII. 
Trish potatoes—The crop maps show that 36.3 per cent of the 
Sassafras loam is occupied by Irish potatoes and that this is the only 
important truck crop grown on the type. The replies to inquiries 
show that 66 per cent of the farmers prefer a loam or heavy loam soil 
for the crop, while 34 per cent wish a sandy loam. The Sassafras 
sandy loam carried the only other important acreage in potatoes in 
the mapped area. 
Sweet potatoes——The largest acreages of this crop were mapped 
on the Sassafras coarse sandy loam, the Sassafras sandy loam, and 
the Sassafras sand. The sand and coarse sandy loam group of soils 
carried 509.2 acres of sweet potatoes out of a total of 720.1 acres 
mapped on the dominant soils. The Sassafras sandy loam carried 
163.4 acres of the remainder. The expressed soil preferences show 
sand preferred by 61 per cent of sweet-potato growers and sandy 
loam by 39 per cent. The facts from the two sources are well in 
accord. 
Tomatoes.—In the case of this crop the two sets of facts appear 
to be at some variance. It is held, however, that a fifth survey, made 
in the vicinity of Salem, N. J., would have corrected this seeming 
discrepancy, since the Sassafras loam is extensively used in that 
vicinity for the production of canning tomatoes. The Freehold area 
produced no tomatoes. The Hartford area included areas grown 
both for market and for canning. The Thorofare and Swedesboro 
areas included areas of tomatoes grown almost exclusively for mar- 
ket, and only the residue of the crop after the early tomatoes have 
been shipped is normally sold for canning. Thus the figures from 
the four detailed areas throw truck crop tomatoes into undue 
prominence. 
It appears from:-the tabulated areas that slightly more than one- 
half of all the area in tomatoes was found on the sand and coarse 
sandy loam soils. Outside of this group, the Sassafras sandy loam 
was the only type carrying an important acreage, 171 acres in all. 
In the tabulated answers to inquiries, 52 per cent of the replies ex- 
S————- trrT 
