134 EXPERIMENT STATION RECORD. [Vol. 4n 



yields than were obtained frwni nortliern-grown seed. Tlie removal of suckers 

 had no material effect on the yields. 



The production and distribution of Maryland Manunotli t()])acco seed showed 

 that the variety seldom failed to outyield greatly the varieties comnionly 

 grown. 



Variety tests with winter oats in progress since 1908 are reported as bavin.i;- 

 been interrupted several times by severe winter conditions. The varieties 

 giving the best results were Culberson, Bicknell, and ^^'inter Turf. The highest 

 single yield, 64 bu. per acre, was made by Bicknell. 



In the wlieat variety tests, which have been running since 1890, the leading 

 varieties during the past 12 years were Bearded, Purple Straw, Dietz, Ijong- 

 berry, Mannnoth Red, Currell Prolitic, and China. Fulcaster, Gold Coin, 

 Rudy, and Leap Prolific also gave good yields. 



[Field crops] work of the San Antonio experiment farm in 1918, C. R. 

 I.ETTEicH (U. 8. Dept. Agr., Dept. Circ. 73 (1920), pp. 3-5, 7-29, fiff-^. .3).— Work 

 with cotton, corn. Dwarf milo, oats for grain and hay, sorglium, Sudan grass, 

 Rhodes grass, green manure crops, and flax embracing rotation, tillage, and 

 A'ariety tests were continued along tlie same general lines as heretofore noted 

 (E. S. R., 39, p. 835). Agricultural conditions in the region, the scope of the 

 work at the farm, and the results of the different experiments are briefly 

 described. The season of 1918, as stated, was a very poor one for crop pro- 

 duction. 



With the exception of oats for hay and for grain the 1918 yields of all tlie 

 crops in the rotation experiments are reported as below the average for the 

 10-year period. A marked advantage of rotation over continuous culture was 

 pointed out in 1918 by the yields of cotton and sorghum and by the better con- 

 trol of certain weeds and plant diseases, particularly Johnson grass and cotton 

 root rot. For tlie past three years early preparation of the land was an 

 advantage during periods of drought. The influence of subsoiling on crop 

 production was insufficient to justify the practice. The use of 16 tons of 

 barnyard manure per acre gave comparatively large increases in tlie yields of 

 cotton, corn, and milo in 1918, but the average results for the 9-year period 

 did not warrant tlie expense of purchasing and hauling the manure altliough 

 they pointed out the value of handling properly and applying the manure 

 produced on the farm. The use of cowpeas, rye, and field peas as green 

 manures at the farm has failed to give perceptible increases in crop yields. 

 Cowpeas planted between wide-spaced rows did not increase the yield of corn, 

 and it was observed that when not planted until the corn is 2 to 3 ft. high cow- 

 peas will not decresrse the yield appreciably. 



The grain yields of all varieties of sorghum grown in 191S were i-ather low 

 owing to midge damage, and the yields of stover were more indicative of 

 the value of tlie varieties tested. Sunrise Ivafir yielded approximately 2^ tons 

 pev acre, being outyielded only by Dwarf milo, but the kafir forage was 

 much superior to that from milo. 



While the yields of flax in 1918 were much better than in the two jireceding 

 years, they ranged from only 2.2 to 9 bu. per acre and are- not considered largo 

 enough to encourage growing flax in place of tlie staple crops commonly 

 grown. In tests with beans, Henderson Bush Lima survived the hot weather 

 fairly well and indicated that with irrigation it probably could be made profit- 

 able. Blackeye cowpeas included in these tests gave b.v far the best yield. 



[Report of the] agronomy department, A. F. Vass {Wyoming Sta. Rpt. 

 1919, pp. 150. 151). — Tlie year's results with small grains are regarded as indi- 

 cating that early seeding, altliough growth at first may he slow, tends to ripen 



