June, 19201 AGRONOMY 273 



Tepary is less prolific than varieties of Phaseolus vulgaris in the suhhumid coast districts of 

 central and northern California. The: preblossoming period, the blossoming period and the 

 life period are each functions of the climate. They arc longer in cool climates than in warm 

 climates and they are cither increased or diminished as the planting date causes them to 

 occur during cool or warm weather. -/•'. .1/. SchertZ. 



1869. JOHNSON, T. C. Potato growing in Eastern Virginia. Potato Mag. 2-: 8-9, 24-25. 

 * fig. 1919. 



1870. Karraker, P. E. What is the value of the usual laboratory work given in general 

 soil courses? Jour. Amer. Soc. Agron. 11:253, 256. 1919. 



1871. Keeler, M. D. Profits of commercial potato storage. Potato Mag. 2 2 : 10-13, 30. 

 5 fig. 1919. — Also describes methods and plans for use on farms. — Donald Folsom. 



1872. Kiesselbach, T. A. Experimental error in field trials. Jour. Amer. Soc. Agron. 

 11: 235-241. 1919— See Bot. Absts. 4, Entry 378. 



1873. Kincer, Joseph B. Temperature influence on planting and harvest dates. Monthly 

 Weather Rev. 47: 312-323. 20 fig. 1919. 



1874. Krishnamurti, Row K. The effect of salinity on the growth and composition of 

 sugar cane varieties. Agric. Jour. India 14: 476-493. 11 pi., 5 charts. 1919.— See Bot. Abst. 

 3, Entry 2928. 



1875. MacMillan, H. G. The vitality of alfalfa roots. Proc. Colorado Sci. Soc. 9: 251- 

 252. 1919. — Cites unusual vitality of alfalfa roots, and the ability of an alfalfa root shat- 

 tered and decayed at both ends, without a crown, and with no opportunity for growth in a 

 cultivated field for 1 year, to send out from an adventitious bud 3 shoots, 1 of which bore 

 leaves and rootlets. — W. W. Robbins. 



1876. Mainwaring, C. Linseed. Rhodesia Agric. Jour. 16:326-327. 1 pi. 1919. 



1877. Mainwaring, C. Weeds. Rhodesia Agric. Jour. 16: 313-315. 1 pi. 1919. 



1878. Mathews, J. W. Economic plants at the National Botanic Gardens, Kirstenbosch, 

 and the aim of their cultivation. South African Jour. Indust. 2: 749-758. 1919. 



1879. Moreno, Eduardo. La combustibilidad del tabaco. Contribucion al estudio 

 agro-quemico de la hoja. [Combustibility of tobacco.] Revist. Agric. Com. y Trab. 2:377- 

 379. 1919. — In a series of tests on the effect of different fertilizing materials on the burn- 

 ing quality of tobacco it was found that a mixture of the double phosphate of lime, ammo- 

 nium sulphate and sulphate of potash increased the combustibiltiy; cyanamide may be ap- 

 plied in only very small quantities due to danger of toxic effects, and potash should be applied 

 in the form of sulphate. — F. M. Blodgett. 



1880. Preston, C. F. Comparison of varieties in Pennsylvania. Potato Mag. 2 s : 14-15. 

 / fig. 1919. 



1881. Robson, R. Control of the weeds Whitlow pepperwort and black mustard. Jour. 

 Bd. Agric. [London] 26: 56-63. 4 fig- 1919. — Whitlow pepperwort (Lepidium draba), 

 a weed said to be above ground as bad as charlock and below ground as bad as bindweed, can 

 be satisfactorily controlled by spraying with copper sulphate alone at the rate of SO gallons 

 of a 4 per cent solution per acre, or with copper sulphate in combination with either ammonium 

 sulphate or sodium nitrate. — Black mustard (Sinapis nigra) was also controlled by similar 

 means. — M. B. McKay. 



