il just as much as to summer-fallow and get 30 bushels
of wheat every other year. It is the same thing in either case. But in
summer-fallowing, we clean the land, and the _profits_ from a crop of 30
bushels per acre every other year, are much more than from two crops of
15 bushels every year. You know that Mr. Lawes has a field of about
thirteen acres that he sows with wheat every year. On the plot that
receives no manure of any kind, the crop, for twenty years, averaged
16-1/4 bushels per acre. It is plowed twice every year, and the wheat
is hand-hoed in the spring to keep it clean. A few years ago, in a field
adjoining this experimental wheat field, and that is of the same
character of land, he made the following experiment. The land, after
wheat, was fallowed, and then sown to wheat; then fallowed the next
year, and again sown to wheat, and the next year it was sown to wheat
after wheat. The following is the result compared with the yield of the
continuously unmanured plot in the experimental field that is sown to
wheat every year:

1. Year--No. 1--Fallow No crop.
No. 2--Wheat after wheat 15 bushels 3-1/2 pecks per acre.
2. Year--No. 1--Wheat after fallow 37 " -- " "
No. 2--Wheat after wheat 13 " 3-1/4 " "
3. Year--No. 1--Fallow after wheat No crop.
No. 2--Wheat after wheat 15 bushels 3-1/4 pecks per acre.
4. Year--No. 1--Wheat after fallow 42 " -- " "
No. 2--Wheat after wheat 21 " 0-1/4 " "
5. Year--No. 1--Wheat after wheat 17 " 1-1/4 " "
No. 2--Wheat after wheat 17 " -- " "

Taking the first four years, we have a total yield from the plot sown
every year of 66 bushels 2-1/4 pecks, and from the two crops alternately
fallowed, a total yield of 79 bushels. The next year, when wheat was
sown after wheat on the land previously fallowed, the yield was almost
identical with the yield from the plot that has grown wheat after wheat
for so many years.

So far, these results do not indicate any exhaustion from the practice
of fallowing. On the other hand, they tend to show that we can get
_more_ wheat by sowing it every other year, than by cropping it every
year in succession. The reason for this may be found in the fact that in
a fallow the land is more frequently exposed to the