times as much protein as Japanese millet, the highest of the nonlegume crops. This fact gives the soybeans a distinct advantage, for protein is the most expensive ingredient of our rations and the one generally lacking in the crops commonly grown on the eastern farms. When the mixture of millet and soybean hay was fed to the cows in the college herd, it was observed that they picked out the soybean plants and ate them first, indicating a considerable difference in palatability.

DISCUSSION OF RESULTS.

Japanese millet has yielded more hay than any other crop or combination of crops. If its average yield is represented by 100, the mixture of Japanese and soybeans is 88; Sudan grass and soybeans 84: soybeans alone 72; Sudan grass alone 72: Hungarian 72; Siberian 63; and Golden least with 62. There would be no trouble in making a choice if the crops were equal in feeding value, but when the relative protein percentages are compared, an entirely different aspect is presented. Soybeans lead with 231; Sudan grass and soybeans 174; Japanese and soybeans 156; Japanese alone 100; Siberian 98; Hungarian 95: Golden 76; and Sudan grass lowest with 71. It is interesting to note that in yields of protein the mixtures fall about midway between the soybeans and millets alone.

The percentages of fiber in the crops as harvested show that the soybeans again have the advantage, being considerably lower in this respect than the millets. These percentages, calculated to their relative values are as follows; Sudan grass 126; Millets 119; Sudan and soybeans 101; Japanese and soybeans 91; soybeans 83. Probably the higher percentages of digestible carbohydrates for millets, as given in Henry & Morrison's "Feeds & Feeding", are to a certain extent due to the greater fiber content. A large part of the potential energy of fiber is required for the digestive processes, and therefore is of little value in the production of flesh or milk.

Another factor which must be taken into consideration in making a choice between these crops is that soybeans, if inocu lated, are capable of obtaining nitrogen from the air thru the root nodules. If advantage is taken of this fact, less money

need be expended for nitrogen, which is the most expensive ingredient of commercial fertilizers.

tail"

VARIETIES.

MILLETS: Japanese has out yielded the millets of the "fox

group in all particulars and moreover, has a lower percentage of fiber. It requires a longer growing period than the Hungarian and Golden, and because of this fact and its rank growth, is more difficult to cure. However, the later date at which Japanese is ready to cut for hay, makes it more suitable for seeding with soybeans, allowing early varieties of the lat

ter to fill their pods.

Hungarian has proven slightly superior to the others of the "foxtail" group which were tested. The relative yields of hay (15 percent moisture) are: Hungarian 72; Siberian 63; and Golden 62. All of these millets are comparatively easy to cure, their green yields being only slightly more than half that of the Japanese and also, the weather is usually better for hay making when they are ready to cut.

Sudan grass makes a very tall, (6 feet) coarse growth and is difficult to cure and handle. Excluding the yields of 1921, when it had a poor stand, Sudan grass has produced about 80

percent as much hay as Japanese millet and this seemingly of an inferior quality. Due to its habit of growth, soybeans have not done as well when seeded with Sudan grass as with Japanese millet. It requires a longer growing season than the latter and on rich land where a large yield of forage is the only consideration it probably could be made to produce more than any of the millets.

SOYBEANS: The five varieties of soybeans tested have the following relative hay yields when seeded alone. Medium Green 81; Elton 73; Ito San 72; Virginia 70; and Wilson 65. The yields of protein find them in the same order; Medium Green 273: Elton 259; Ito San 232; Virginia 210; and Wilson 179. Evidently the varieties which can fill their pods by September 15th, are superior to the later ones. Virginia and Wilson have been considered good varieties for hay, due perhaps to their tall growth and fine stems. The Virginia has slightly outyielded the Wilson in these tests, but it is very difficult to harvest and cure, its twining habit making it necessary for a man to follow the mower to separate the mowed swath from the standing beans. It is also too late a variety for seeding with the millets. This is also true of Wilson and the latter's advantage of erect growth and fine stems seems to be more than offset by its inferiority in yields. Perhaps if seeded a few days earlier it would increase considerably in this respect.

Medium Green stands up better than any of the soybeans and altho rather coarse, its ability to produce large yields of both hay and protein, makes it a desirable variety. Ito San and Elton are smaller and earlier than the Medium Green and seem to make excellent varieties to seed with Japanese millet. Both have a somewhat decumbent growth and when seeded. alone, are liable to be beaten down by severe storms.

COST OF SEED.

There is considerable variation between these crops in the cost of the seed required per acre. The approximate amounts of seed and costs per acre are shown in Table III. Japanese

millet with an acre cost for seed of only $1.00 is the least expensive, while Medium Green soybeans amounts to over $7.00. The rate of seeding for the soybeans may seem high, but it was necessary to use these amounts to prevent weeds from competing too severely.

MILLET OR SOYBEANS?

Japanese millet and Medium Green soybeans have decidedly outyielded the other varieties in their respective classes, therefore they will be used to shed light on the above question. The yields of Medium Green in 1921 will be eliminated, due to a poor stand. This leaves only the 1922 results to be compar

ed. In that year, the millet produced 7978 pounds of hay, the soybeans 7117, or 861 pounds less. According to Table II the percentages of total digestible nutrients, are 49.8 and 46.6 for soybean and Japanese millet hay respectively. If these percentages are applied to the actual hay yields, the pounds of total digestible nutrients per acre are: millet 3718, soybeans 3544; a difference of 174 pounds in favor of the millet. However, the soybeans contained 1307 pounds of protein, equivalent to 209 pounds of nitrogen. Experiments, at this and other stations, show that the roots and stubble of soybeans contain

about 10 percent as much nitrogen as the tops. Adding 10 percent to the 209 pounds of nitrogen in the tops, gives a total of 230 pounds. It is generally accepted that legumes, when properly inoculated, obtain approximately two-thirds of their nitrogen from the air, even when nitrogenous fertilizers are applied. This would mean in this case that 154 pounds of nit

rogen had been taken from the air by the soybeans. Nitrogen in nitrate of soda costs about 20 cents per pound. If these figures are applied to this crop of soybeans, we have a gain of over $30. per acre.