424 EXPERIMENT STATION EECOED. 



bydroxy-pbenol, paracliliydroxy-plienol, ortbocresol, metacresol , paracresol, 

 ortbopbtbalic acid, metapbtbalic acid, and paraphtbalic acid. 



In other experiments tbe autbor found tbe following concentrations just to 

 cause tbe cessation of movement in a culture of C. multifllis in 10 minutes: 

 Hydrochloric acid 0.009 per cent, pyrocatecbin 0.1 per cent, and resorcin 0.18 

 per cent. 



Mixtures of these poisons, each slightly weaker than the minimum given 

 above, failed to have the same poisonous effect that was shown by tbe single 

 poisons in slightly greater strength. 



Notes on the number and distribution of native legumes in Nebraska and 

 Kansas, J. A. Warren {V. S. Dept. Agr., Bur. Plant Indus. Circ. 31, pp. 9).— A 

 series of investigations was begun in 190S to determine the occurrence of wild 

 leguminous plants in Nebraska, Kansas, and Colorado in order to throw some 

 light if possible on the role that they may pMy in storing nitrogen in virgin 

 soils. Counts were made from time to time of tbe species of leguminous plants 

 in different plats. In the Sandhill region leguminous plants were found at tbe 

 rate of 8.4 per square yard, in high plains 3.G plants per square yard, and in 

 the region east of 100° west longitude an average of 17 plants for each square 

 yard, were found. 



Seeds and plants imported during the period from October 1 to December 

 31, 1908. Inventory No. 17 ( C7. S. Dept. Agr., Bur. Plant Indus. Bui. 153, 

 pp. 58). — This gives a list of the seeds and plants imported by the Section of 

 Seed and Plant Introduction during tbe period mentioned. The total number 

 of introductions was 685 lots of seeds and plants, many of them coming from 

 the collection of F. N. Meyer in China. 



FIELD CROPS. 



Field experiments in 1906-1908, C. D. Woods and J. M. Bartlett (Maine 

 Sta. Bui. 167, pp. 85-lOJf). — Various experiments with different field crops are 

 summarized in this bulletin. 



In fertilizer tests with potatoes in 1906, home-mixed and ready-mixed fer- 

 tilizers were compared, but the results secured were not conclusive. A com- 

 parison of high-ridge and modified-ridge culture made in 1907 and 1908 left 

 nothing to choose from between the two methods so far as yield was concerned. 

 The work is to be continued in 1909. 



A number of varieties of potatoes were tested for blight resistance, observa- 

 tions upon the growth and upon the quality of tubers being made entirely upon 

 an unsprayed crop. As a result of this test 14 varieties have been discarded. 

 A comparison of a proprietary brand of fungicide with regular Bordeaux mix- 

 tui-e appeared to result in a decreased yield, due to an injury to the vines by 

 the proprietary brand. The Bordeaux mixture was also tbe more effective in 

 protecting from early blight. 



The status of alfalfa culture in Maine is discussed and conclusions from a 

 previous bulletin (E. S. R., 17, p. 1059) are again reported. Work in destroy- 

 ing wild mustard by spraying with copper sulphate and iron sulphate brought 

 out the fact that young wild mustard (Sinapis arvensis) is readily killed by 

 spraying with either solution, while the wild radish (Raphanus raphanistrum) 

 is very resistant and even defied a treatment with a 20 per cent solution of iron 

 sulphate reenforced with 5 per cent of sulphuric acid. Directions for killing 

 wild mustard by spraying with these salts are given. 



In liming experiments tbe lime was applied at the rates of 500, 750, and 1.000 

 lbs. per acre. Thus far results have indicated that the liming had compara- 

 tively little or no effect upon oats, while it gave a material increase in yield of 



