Crotalaria for Forage


computation of the comparative feeding value of the C. intermedia
silage and No. 1 green federal grade alfalfa hay. The alfalfa had
been purchased on the Kansas City market.
 The milk yield, changes in body weights, and feed con-
 sumption were calculated according to the standard formula for
 this purpose:
 Period IIa + Period la + Period IIIa P b Period Ib + Period IIIb
 2 2
 In applying the above formula, "a" designated the periods du-
 ring which C. intermedia silage was fed, while "b" represented
 all periods in which alfalfa hay was fed. The results of this cal-
 culation are given in Table 16.
 TABLE 16.-TOTAL FEED INTAKES, MILK YIELDS, AND CHANGES IN BODY WEIGHTS
 OF THE COws DURING THE DOUBLE-REVERSAL FEEDING TRIALS
 Feed Consumption* Total Production







 1933-1934 8 3,458.5 ........... 2,610.5 1,115.0 1,622.65 94.18 160.5
 8 1,420.5 2,842.0 91.0 1,790.40 107.74 130.5





which either the silage or the alfalfa hay was fed.

 It can be seen by a glance at Table 16 that the cows con-
sumed more alfalfa hay and corn silage, yielded more milk and

butterfat, but gained less weight per group while on that ration
than did the same animals when C. intermedia silage was offered.
1933-1934 8 3,458.5 ......... 2,610.5 1,115.0 1,622.65 94.18 160.5
 8 .......... 1,420.5 2,842.0 915.0 1,790.40 107.74 130.5
 1934-1935 8 3,314.3 .... 2,348.5 1,172.8 1,883.85 93.61 125.5
 8 ,........ 1,515.3 2,792.6 829.0 2,136.55 118.38 76.0
 1935-1936 ... 8 3,290.2 ...... .... 2,996.7 1,337.5 2,234.00 113.70 212.0
 8 ........ 1,340.0 3,329,1 1,200.0 2,405.65 123.75 155.0



 When the feed consumption were calculacomputed forth da per 100 poundsuring
which either the silage or the algroupalfa hay s were given equal weighting
 on this can basis, it was possiblglance to calculate the total digestible con-
sumed more alfalfa hay and corn silage, yielded more milk and



butterfat, but gained less weight differ groupenes in consumption of the
basal ration, and tsam animallow for these intermdia s of No. 1 alfalfa hay,ered.
 When the feed consumption was computed per 100 pounds
of milk produced and the groups were given equal weighting
on this basis, it was possible to calculate the total digestible
nutrient equivalent of any differences in consumption of the
basal ration, and to allow for these in terms of No. 1 alfalfa hay,
as shown in Table 17. Likewise, with average body weights,
milk yields and fat percentages for each group, it was possible to
calculate the nutrient requirements and to compare these with
the nutrient intakes from the feeds consumed. All of these com-
parisons are given in this table. The average daily gains were
computed, but no allowance was made for them.