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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.

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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.

VARIETIES OF SILAGE CORN FOR MILK PRODUCTION

TABLE 2-ANALYSIS OF CORX AS CUT

First Trial

Fat

Ripe, basal

Percent of Total Green Weight
Stage of
Type
Maturity

Crude Crude
Water D. M. Ash

Protein riber

N F.E Pride of the North leaves dry 70.22 29.78 1.171 2.18 5.87 19.44 0.81 (Early) Leaming Very (Medium) soft dough 175.01|24.96 0.99) 1.92 5.33 16.16 0.56 Eureka

Very (Late) early milk 79.49 20.51 0.89 1.28 5.95 11.97 0.29 Second Trial Early (Ripe, husks 166.19 33.81 0.95 2.60 5.56 23.41 1.00

(drying Medium Soft dough 73.77|26.23 1.07 1.71) 5.93|16.89 0.63

) Late Early milk 177.29 22.71 1.00 1.26 6.66|13.50 0.29 Third Trial Early | Nearly ripe 69.22 30.78 1.06 2.37 5.15 21.27 0.93 Medium

| Very soft 75.46 24.54 0.99 1.94 5.13 15.88 0.60

dough Late Very early 80.42 19.58 0.95 1.51 5.40 11.43 0.30

: milk Tverage of Three Trials Early Ripe 68.54 31.46 1.06 2.18 5.53 21.37 0.91 Medium Soft dough 71.76 25.24 1.02 1.86 5.47 16.31 0.60 Late

Early milk 179.07 20.93 0.95 1.35 6.00 12.30 0.29

The three-year average dry matter content of the Early as harvested is 31.46%, Medium, 23.24% 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 SUTRIENTS IN STALK AND EAR PER ACRE.

Dry
Matter

Ash

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Protein

Fiber

N. F. E.

Fat

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1ibs.

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i lbs. 1 | lbs. 1 "

115, Pride of North

Entire Plant 133.81 8386 0.95 235.6) 2.60 645.6 5.56 1379 23.41 5806 1.00 247.2
Ear Only 151.35 4470 0.791 68.81 4.63|403.03.66 319 40.20 3499 2.06 179.3
Stalks Only 25.44 4095 1.24 199.6 1.28|206.0 8.60 1384 13.92 2240 0.39 62.8
Proportion of
Total in Ear 52

26
66
19
161

74
Proportion of
Total in Stalk 48

74
34

81
39

26 Leaming

Entire Plant 26.23 8762 1.07 358.5 1.71570.01 5.93 1981 16.895642 0.63 211.6
Ear Only 36.85 3335 0.69 62.5 3.11 281.5 3.74 339 27.91 2526 1.40 126.7
Stalks Only 21.28 5162 1.16 282.4 1.07 260.5 6.38|1553 12.23 2978 0.36 87.7
Proportion of
Total in Ear 39

18
52

18
46

59
Proportion of
Total in Stalk 61

82
48
82
54

41 Eureka

Entire Plant 22.71 8902 1.00393.3 1.26 492.6 6.66 2611 13.50'5293 0.29 115.0
Ear Only 17.29 786 0.53 24.11 1.88 85.53.06 139 11.50 523 0.32 14.6
Stalk Only 25.56 8857 1.43 495.5 1.591551.0 8.07 2796 14.10 4886 0.36 124.8
Proportion of
Total in Ear 8

5
13

5
Proportion of
Total in Stalk
92

87

95

ETE

95

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%, 32%, 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.

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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

TABLE 4-ANALYSIS OF SILAGE AS FED

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Late

First Trial, 1920-1921.

Dry
Type
Water

Matter

C/C
Early 71.26 25.7+
Medium 74.83 25.17

80.57 19.43
Second Trial, 1921-1922.
Early 68.36 31.64
Medium | 75.09 24.91
Late 79.76 20.24
Third Trial, 1922-1923.
Early 70.24 29.76
Medium 75.90 24.10
Late 80.69 19.31
Average of All Trials.
Early 70.95 29.05
Medium 75.27 24.73
Late 80.34 19.67

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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.

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