September 20. All three silos were refilled on September 25. The growing season was about 115 days.

The maturity of the corn when harvested was as follows: The Early was in hard dough stage or nearly ripe, the stalks and husks being still green; the Medium was in late milk to soft dough; the Late was in very early milk.

As rather poor stands were obtained, the acre yields were not determined. The amounts ensiled were for the Early 14.5 tons; Medium 17.9 tons; Late 17.7 tons. As in 1921, special care was used to pack thoroughly. The small diameter of the silos makes it necessary to cut in small amounts at a time, rather than run through a full load without stopping.

ANALYSIS OF THE GREEN CORN AS HARVESTED

A sample from each of the 10th, 20th and 30th rows from each variety was taken at the time of harvesting. These samples were put through a power feed cutter, sampled and analyzed. The analysis is given in Table 2.

(Medium) soft dough 75.04 24.96 0.99 1.92 5.33 16.16 0.56

Eureka

(Late)

Second Trial

Very

early milk 79.49 20.51 0.89 1.28 5.95 11.97 0.29

Ripe, husks [66.19 33.81 0.95 2.60 5.56 23.41 1.00
Jdrying

Early

Medium
Late

Soft dough 73.77|26.23| 1.07
Early milk 177.29 22.71

1.71

5.93 16.89 0.63

1.00 1.26

6.66 13.50] 0.29

Late

Very early 180.42 19.58 0.95 1.51 5.40 11.43 0.30 milk

The three-year average dry matter content of the Early as harvested is 31.46%, Medium, 25.24% and Late, 20.93%. All of these seem a little higher in dry matter at time of cutting than the average of several varieties grown on the Experimental Plots, the analysis of which is given in Table 1.

In Table 3 is given the proportion of nutrients in stalk and ear. These separations and analysis were made for the second trial only.

TABLE 3-SILAGE CORN FOR EXPERIMENTAL SILOS-SECOND

TRIAL, 1921.

PROPORTION OF NUTRIENTS IN STALK AND EAR PER ACRE.

This table (No. 3) is very instructive in showing the wide difference in these three varieties of corn (representing types) at harvesting time. In the Pride of the North, 52% of the dry matter of the plant was in the ear; in Leaming 39% was in the ear; and in Eureka only 8% with the balance in the stalk. Of the protein 66%, 52%, and 13% was in the ear of Pride of the North, Leaming and Eureka respectively. The same marked proportions hold for the N-free-extract and fat, showing that with the mature silage more than one-half of its entire nutrients are stored in the ear, while the Medium has about 40% in the ear, and the Late has only about 10% of the nutrients stored in the ear with the remainder (90%) to be found in the stalk.

The fiber of the ear of the Early constituted only 7.1% of the total dry matter of the ear, while that of the Medium was 10.1%, and the Late 17.7%.

VARIETIES OF SILAGE CORN FOR MILK PRODUCTION

ANALYSIS OF SILAGE AS FED

The silage was sampled during each ten-day period by collecting a composite sample at feeding time over a period of three days. It was preserved with chloroform, tightly sealed and sent to the chemical laboratory at New Haven. Table 4 represents the average of all samples collected, ten from each silo in each trial.

The silage analyses in the First Trial revealed that the Early and Medium were very similar in composition and presumably of about equal feeding value. The Early would not have been so low had the losses by fermentation not been so great as a result of the poor packing in the silo this year.

In the second and third trials, the differences are much more marked as between Early and Medium silage, the Early being clearly higher in dry matter. The Medium is clearly superior to the Late in all three trials.

The average of the three trials for dry matter shows the Early to contain 29.05%, the Medium 24.75% and the Late

19.67%, the Medium being almost exactly half way between the Early and Late, the average of which is 24.36%. The protein is comparatively high in the Early; the fiber is lowest in the Medium, and about equal in Early and Late; the nitrogenfree extract is comparatively low in the Late; and the fat in

the Early compared to the Late is in the same proportion as the dry matter. The high fiber of the Late is typical of the large immature varieties of corn.