FIELD CROPS. 529 



The work with beans up to the present time has brought out the fact that 

 2 distinct types of these Indian esculent legumes are in existence. One type 

 includes about 23 distinct varieties belonging to the ordinary kidney beans 

 (Phaseolus riilguris), while the other type known as the tepary (P. acutifoUua) 

 is specifically distinct from any cultivated bean heretofore mentioned in horti- 

 cultural literature. More than 40 distinct agricultural varieties of the tepary 

 bean were segregated and grown. In 9 experiments covering 3 years' work at 

 Yuma, 2 years at Tucson, and 2 at McNeal, the average yield of the tepary 

 variety was about 4 times the average for the varieties of the kidney beans. 

 The adaptations of these beans to their environment are pointed out. 



The relation between contemporaneous silking and tasseling of sweet corn 

 varieties and their yield was pointed out by an experiment carried on during 

 the season. Nineteen stalks having fresh silks and an abundance of pollen 

 and 18 other equally vigorous stalks having the pollen ripe and in process of 

 distribution but on which the silks had not yet appeared were tagged on August 

 29. When harvested the 19 ears from the stalks with contemporaneous tassel- 

 ing and silking weighed on an average one and one-half times as much as the 

 average for the ears from the other stalks. 



[Work at the Sulphur Springs Valley and Snowflake dry farms], R. W. 

 Clothier and A. M. McOmie {Arizona Sta. Rpt. 191 J, pj). 529-532). — Variety 

 tests of corn at the Sulphur Springs A'alley dry farm resulted in the best yield 

 of grain from White Flint, 13.1 bu. per acre. Owing to an unfavoivible season 

 all yields were rather low, the highest being on a plat, a part of which receivetl 

 some flood water. 



Four plats of tepary beans grown by purely dry-farming methods made an 

 average yield of 527 lbs. per acre as compared with an average of 97 lbs. with 

 common pink beans. The tepary beans displayed great resistance to drought 

 as well as remarkable recuperati^■e powers after the drought was broken. 



In experiments with supplemental irrigation the experimental plats were 

 watered fi-om December 16 to June S, the total amount of water given being 

 3J in. During the drought in August one plat of milo maize received 3.14 in. 

 of water, a second plat 1.32 in. of water, and a plat of sorghum 1.32 in. of 

 water. The first plat of milo maize yielded 35.7 bu. of clean grain of high 

 quality ; the second, 24 bu. ; and the sorghum yielded 3.24 tons of forage and 340 

 lbs. of clean seed per acre. 



Work with summer fallowing in 1910 showed that considerable water may be 

 accumulated in the soil during the rainy season but that it is lost before the 

 next rainy season begins. A plat cropped in 1909 and fallowed in 1910 yielded 

 this year 29.9 bu. of milo maize per acre, but this result was attributed to the 

 excellent condition of the soil rather than to fallowing. The lighter tj^pes of 

 soil in Sulphur Springs Valley appear to be better adapted to dry farming than 

 the heavier types. Milo maize seems best adapted to grain production and 

 sorghum to the production of forage. 



The Snowflake dry farm was broken during the winter of 1909-10 and plant- 

 ings were made in May, 1910. The crops as well as the land were injured by 

 heavy winds. The grain of milo maize, sorghum, Kafir corn, and Red Dent corn 

 did not mature. The yields of forage on plats irrigated once before planting 

 ranged from 1,680 lbs. for White Flint corn to 4,960 lbs. per acre for Kafir com. 

 On land summer-fallowed the previous year the lowest yield of forage was 

 2,400 lbs. per acre for Kafir corn and the highest 4,108 lbs. for broom corn. 



[Variety and manurial tests with cereals and root crops], P. H. Fotjlkes 

 ET AL (Field Expts. Harper-Adams Agr. Col., and Staffordshire and SliropsJiire, 

 Rpt. 1911, pp. 1-23, 27-U).—This continues earlier work (E. S. R., 26, p. 230). 



The 8-years' annual average net profit following fertilizer applications to 

 meadow land v/ere greater in case of the use per acre of (1) 2i cwt. of super- 



