FIELD CROPS. 33 



the fact that it is not colored by iodiu and has other color relations which 

 distinguish it. It is found in many fungi and in addition occurs in the callus 

 of the sieve tubes and in the membrane of the mother cells of pollen grains. It 

 is also found widely distributed among thallophytes and algfe, but it is in the 

 fungi that it occurs most abundantly. 



Attention is called to the parallelism between this substance and that described 

 by Tanret (E. S. R., 9, p. 921), to which the name fongose was given. The 

 author decides that the two substances are identical but that the name callose 

 has priority and should be adopted. 



FIELD CROPS. 



The complete farmer, P. McConnell (London and New York, 1910, pp. 

 XIV+Jt32, pis. 4, figs. 54).— This is a very comprehensive manual of information 

 for the farmer. The principal subdivisions of the work deal with soils, crops, 

 live stock, and farm equipment. 



History and importance of electro-culture with special reference to the 



more recent experiments (Arch. Dent. Landw. Rats, 84 {1910), pp. 535-570). 



This address discusses the effect of electricity on strawberries, beets, and other 

 plants, and gives an especially full account of exi^rimeuts conducted at 

 Dahlem. 



Demonstration farm reports, 1909, Pottawattamie County, P. G. Holden, 

 A. H. Snyder, and A. E. Nelson (Iowa State Col. Agr. Ext. Dept., Demonstr. 

 Farm Rpt. 7, pp. 20). — This publication states the results of experiments on a 

 county farm. 



Seed corn samples were secured for test from the planter boxes of 76 farms. 

 The average yield secured was 36 bu. per acre; the average of the 5 highest 

 samples 46..3 and of the 5 lowest 27.1 bu. The 3 highest yields from introduced 

 varieties averaged 28.4 and the 3 lowest 23 bu. per acre, while the average from 

 the 3 highest yielding samples submitted by seed companies was 38.8 and the 

 average of the 3 lowest 29.2 bu. per acre. 



Five kernels per hill produced a higher yield than plantings at lower rates in 

 one test, while an average of 3^ kernels per hill produced the maximum yield in 

 another. In this test the percentage of stand during September decreased with 

 the increase in the rate of planting ; the percentage of suckers varied irregularly ; 

 the percentage of barren stalks increased with the rate of planting, while the per- 

 centage of seed ears and of market ears decreased ; and the percentage of nub- 

 bins and worthless ears increased. 



An individual ear test conducted with 40 ears obtained from each of 3 farmers 

 indicated " that there is an enormous difference in the producing power of ears 

 in the same man's seed corn." 



Results of experiments on Black Hawk County farm, 1909, P. G. Holden, 

 A. H. Snydee, and A. E. Nelson {Iowa State Col. Agr. Ext. Dept., Demonstr. 

 Farm Rpt. J,, pp. 18). — The general plan and results of the experiments reported 

 are similar to those noted above. The 5 highest yields secured from farm seed 

 in this county averaged 55.5 bu., the 5 lowest 39.7 bu. per acre ; the 3 highest 

 introduced varieties 52 and the 3 lowest 41.3 bu. The average yield of all 

 farmers' varieties was 49.3 and of 14 introduced varieties 46.2 bu. per acre. 



The results of the test of the number of kernels to plant per hill resembled 

 those noted above except that the lowest percentage of suckers was obtained 

 with the plantings averaging from 2 to 3A kernels per hill, while the percentage 

 of worthless ears was lowest after plantings averaging 2* kernels per hill. 



Demonstration farm reports, 1909, Delaware County, P. G. Holden, A. H. 

 Snydee, and A. E. Nelson {lotva State Col. Agr. Ext. Dept., Demonstr. Farm 



