AGRICULTURAL UTILIZATION OF ACID LANDS. Jue 
Further experimentation will doubtless result in important addi- 
tions to this list. It is especially desirable that additional legumi- 
nous plants be found that are hardy far north and otherwise satisfac- 
tory in rotations. Lupine and serradella, both much employed in the 
ereat potato-growing districts of Pomerania and other portions of 
north Germany, ought to be useful in this country, but thus far they 
have not found favor, perhaps because of the poisonous qualities of 
lupine and the rather light yield of serradella. 
ACID-TOLERANT CROPS IN ROTATION. 
From the data already given, the farmer who desires to try ar 
experiment in acid-land agriculture will be able to select the crops 
that will give him the rotation suited to the requirements of the par: 
ticular kind of agriculture in which he is engaged. Some of these 
crop plants are comparatively new and require special handling as to 
the best time and manner of sowing. When grown for the first 
time the leguminous plants require soil inoculation with the special 
bacteria of their root tubercles. 
Rotations made up from the acid-tolerant crops described above 
have been very successful on some of the sandy, acid farms in Mary- 
land, a few miles northeast of Washington. 
The trees in one newly planted orchard of Grimes Golden apples 
have been kept in a remarkable condition of growth by one initial 
application of manure in the year of their planting, succeeded by the 
following rotation: In May the ground is sowed to cowpeas. These 
are plowed under in September and followed immediately by the 
sowing of rye mixed with hairy vetch. In the following May the 
mixed crop is plowed under. The same one-year rotation has been 
followed year after year. Under this treatment the soil, which has 
the appearance of almost pure sand, has become so fertile without 
the application of lime, commercial fertilizer, or manure that an 
occasional crop of cowpeas has been cut for hay without serious 
interference with the progress of the orchard. 
Another successful combination is a one-year rotation of corn and 
erimson clover by which a heavy yield of corn is produced every 
year without lime or fertilizer in a soil that looks almost like beach 
sand. The land, which is gently sloping, is ridged in contours at 
each interval of 2 feet in elevation, the corn rows being parallel to 
the contour next above them. The crop of crimson clover with the 
corn stubble is plowed under in April a little before corn-planting 
time. In August after the last cultivation of the corn the crimson 
clover is sown between the rows. The seeds germinate so readily 
that when broadcasted a light shower will start them off. If dry 
weather follows before they have had time to send their roots deep 
