1919] FIELD CROPS. 331 



parent flower and rosette mutants, which have been since grown under control, 

 in order to ascertain the range of possible variation for accumulating and fixing 

 characters. The present study is devoted to the isolation of pure lines and 

 to the experimental production of mutants. Production of flower mutation 

 by manipulating the flow of food to different parts through such means as 

 pruning, mutilation, change of position, and correlation has proved unusually 

 successful, and these plants are to be grown to determine the extent to which 

 such artificial mutants are capable of being placed. 



The inheritance of leafing time in the descendants from beeches differing 

 in this respect, C. Raunki.osr (Bot. Tidsslcr., 36 (1918), Xo. 5, pj). 197-203).— 

 A study of beech trees in regard to their time of leafing shows that subspecies 

 exist within the species Fagus sylvatlca which differ marliedly as to their time 

 of leaf production, a correspondence existing between parents and descendants 

 in this respect. It is thought, however, that the case is by no means simple 

 as regards the inheritance of the genotypic factors involved. 



FIELD CKOPS. 



rarm crops, their cultivation and management, F. D. Gaedner et al. 

 (PJiiladclpMa: The John C. Winston Co., 1918, pp. 288, pis. 2, flgs. i22).— This 

 book, described as "a nontechnical manual for the cultivation, management, 

 and improvement of farm crops," and based on practical experience and the 

 results of agricultural research, is designed as a reference work for all engaged 

 in farming. The work is divided into three parts, dealing with (1) the rela- 

 tion and cultivation of the various farm crops, (2) diseases and insect pests 

 affecting the different crops, together with measures for their remedy and 

 control, and (3) statistical information relative to cost of production, the 

 fertilizing value and percentage composition of agricultural products, etc. 



Productive farm crops, E. G. Montgomeet {Philadelphia and London: J. B. 

 Lippincott Co., 1918, 2. ed., rev., pp. XIX+501, pi. 1, figs. 208). — This is a sec- 

 ond and revised edition of a work previously noted (E. S. R., 35, p. 593). 



[Report of field crops work in Arizona], W. C. Heaed {Arizona Sta. Rpt. 

 1D17, pp. IilS-JflT, Jfl8-426, figs. 5). — This describes the continuation of work 

 along the same general lines as previously noted (E. S. R., 39, p. 735) for the 

 year ended .Tune 30, 1917. 



Variety tests with small grains on the Phoenix farm vrere limited to Early 

 Baart wheat, Texas Red, and San Saba oats, and Wisconsin No. 6 and com- 

 mon 6-rowed barley, with yields ranging from 41 to 50 bu. per acre for wheat, 

 from 93 to more than 100 bu. for oats, and from 40 to 65 bu. for barley which 

 had been lightly pastured. 



Hairy Peruvian alfalfa is said to have given better results than common 

 alfalfa. Tests of 10 varieties of cowpeas and 14 of soy beans are held to in- 

 dicate that these crops may become of considerable importance in the State. 

 The more promising varieties of cowpeas included Red Ripper, Two Crop Clay, 

 Iron, and Clay. Black Eyebrow and Ito San soy beans are deemed to be de- 

 sirable early sorts, while Mammoth Yellow and Tarheel Black are especially 

 promising among the larger, later kinds. White Canadian and Colorado Stock 

 field peas seeded late in November and harvested for hay the following April 

 produced 3,300 and 4,400 lbs. per acre, respectively. Garbanzos yielded at the 

 rate of 2.5 tons of cured hay per acre. 



Rhodes grass, Natal grass, and perilla, the last said to be native to Japan 

 and of interest as a possible source of a linseed oil substitute, failed to give 

 satisfactory results on the Salt River Valley farm. 



