to pay their cost in five
of the ten comparisons; the complete fertilizer was used at a loss
four times out of ten; and the nitrogen and potassium combination
three times out of ten. Lime had no appreciable effect on either vines
or fruit.

"No effect of the fertilizers on the fruit itself, aside from yield,
was shown for the first three years; but in 1912, and even more
markedly in 1913, the fruit from the plats on which nitrogen had been
used was superior in compactness of cluster, size of cluster and size
of berry. In 1912 also, when early ripening was a decided advantage,
the fruit on the nitrogen plats matured earlier than that on the
check plats. In 1913 the favorable ripening season and the smaller
crop tended to equalize the time of ripening on all plats. The grapes
on the phosphorus-potassium plats were better in quality than those in
the check plats but not as good as those on the plats where nitrogen
was used.

"Other indexes also show plainly the benefit from nitrogen in this
vineyard; for size and weight of leaf, weight of wood produced and
number of fruiting canes left on the vines were all greater where
fertilizers, and particularly nitrogen, had been used. The three-year
averages (1911-1913) of the measurements for these characteristics are
shown in Table III:

TABLE III.--COMPARATIVE PRODUCTION OF LEAVES, WOOD AND FRUITING CANES
ON GRAPE VINES DIFFERENTLY FERTILIZED

(Averages for three years.)

=======================================================================
FERTILIZER APPLICATION | LEAF | WOOD | FRUITING
| WEIGHT[11] | PRUNED[12] | CANES LEFT[13]
----------------------------+------------+------------+----------------
| _Grams._ | _Lbs._ |
Complete fertilizer; lime | 1,033 | 1,295 | 2,468
Complete fertilizer | 1,010 | 1,367 | 2,609
Nitrogen and phosphorus | 1,047 | 1,272 | 2,585
Nitrogen and potassium | 1,069 | 1,401 | 2,646
Phosphorus and potassium | 964 | 1,086 | 2,326
Check | 930 | 915 | 2,110
=======================================================================

_Cooeperative experiments._

"In order to secure information as to the behavior of fertilizers on
the different soils of the Grape Belt, cooeperative tests were carried
on in six vineyards owned, re