Siuldii Grass. 9 roch soils will grow it, thorough drainage must U- pmvided. Small iiinouiit.-» <>f iilkuli in thrsoil reduce the yiekto markedl; and strongest ccinccntratioiis prerenl profitable culture.

PLACE IN THE CROPPING SYSTEM. Altlwugh Sudan graaa is an annual and can be bitroduoed easily Into any rotation, It probabl] nerer %\ill be widdj used as astapk crop in pennanenl rotati To iill roch a position Acceptably a crop must serve .-ither as ■ "xnonej crop" or as a soil improver.

(Jnder certain conditions in the Southero States Sudan gnus ntiUzed as a has crop or for teed production may be considered u a cash nop, bul in mosl 1 uill begrown a« an emergency 1IM\ cropor for summer pasture.

The other two crope most widelj grown as catch crops or emerpMicyliMV crops are millet and BOTgO, or "cane." (Fig. 4.) The yields of Sudan grii ompared with these two, its chief competitors, over a series .,f years from 1912 U) 1916 and at a considerahle numiier of stations nie given in Table I TAHI.K l.-rnm/xinw/i <>/ Smlan ijrat» uilh millet and toryo in yields per arre oj cured hmj.

Yield per «ere (ton»).

lllk'i-Tl-.

.-n.l.wi gnu.. M ,11.1. >..rl-.,.

228 2.51 4.03 I M 2 14 1 "I 1.2S 3 m I ■ 3.49 fkntlluni Orasl Ptottu S. 34 ,■. '.ij It will be seen thai m the northern Great Plains and in the timothy und clo\ er belt millet yields practically as much hay as Sudan gr but in the central Gnat I'lains there ia a diffennoe of ouodialf too per acre in favor of Sudan gTMS, and in the southeni (ireal I'lains the .\ irld of Sudan g 1 hive times that of millet. The yield of ■orgo in drilled or broadoaated scedm avenijgea in each region about 1 ion more hay per acre than Sudan gré«, hut this is because of the largor amount of moisture in the sorgo hay due in a measure to the greater difficulty of curing its ooane atems, The difference in the art mil J leid of dry mat I or b partly oH'sel by the better (plality of the Sudan grass has.

VALUE IN IRRIGATED REGIONS.

lu many ol the ilTigated parts of the West, where alfalfa is the principa] crop and dairying the chief industry ol the people, alfalfa ha, been mude the constant and the almost complete diet of the cows. The continuous use of this bigh-protem hay has caused digestive Boll. 11M 3