1038 EXPERIMENT STATION RECORD. 



similar conditions and cnt at the same stage of growtti. Pastui'e grass and hay 

 from mixed grass seeds and some clover contained more nutrients, especially 

 when grown on well cultivated and manured land, than timothy, red top, or 

 blue grass alone. 



A comparison of methods for the inoculation of leguminous crops, R. A. 

 MooRE and E. J. Hastings (Wisconsin Hfa. h'pt. 1D06, pp. 281-28-'i). — The meth- 

 ods employed ai'e outlined, and the nature and origin of the cultures used are 

 described. The use of artificial cultures for the production of nodules upon 

 soy beans and alfalfa was not successful, while the inoculation of these crops 

 with infected soil produced nodules in abundance the first year. 



The vitality, adulteration, and impurities of clover, alfalfa, and timothy 

 seed for sale in Iowa in 1906, L. H. I'ammel, R. E. Buchanan, and Char- 

 lotte M. King (Iowa .S7«. Bid. 88, pp. 69, figs. 39, maps 2). — Earlier work of 

 this kind at the station and elsewhere is briefly reviewed and the results of 

 investigations with clover, alfalfa, and timothy seed are reported. 



In 130 samples of red clover seed the percentage of impurities was deter- 

 mined by weight and averaged 1.93 per cent. The highest percentage of im- 

 purities was 33.3 and only 2 samples consisted of pure seed. Of 118 uuweighed 

 samples of red clover seed, 76 were found to contain yellow foxtail (Sctaria 

 glauca), 68 timothy (Plileum pratense), 61 curled dock {Rumex crispus), 57 

 green foxtail (Setaria viridis), 48 lady's thumb {Polygonum persicaria), 46 

 rib grass (Plantago lanceolata), 46 Rugel plantain (Plantago rugelii), 37 rough 

 pigweed (Amarantus retroflexus), 34 sheep's sorrel {Rumex acetosella), 34 

 crab grass {Panicum sangninale) , 30 dooryard plantain {Plantago major), 25 

 lamb's quarter {Clienopodium albtim), and 20 bracted plantain (Planfago aris- 

 tata). Other weeds occurred in a smaller number of samples, and sand was 

 found in 37 samples. 



Of a total of 248 samples of clover seed, 98 contained rib grass, 35 bracted 

 plantain, 21 Canada thistle, and 10 dodder. Five typical poor samples of clover 

 seed contained 10..301 per cent of impurities, and 5 typical good samples 0.096 

 per cent. 



The principal impurities found in white clover seed were sheep's sorrel, Rugel 

 plantain, bi-acted plantain, timothy, curled dock, lamb's quarter, blue grass {Poa 

 pratensis), and cinquefoil (Potentilla). 



In 31 weighed samples of alsike clover seed, the impurities amounted to 3.437 

 per cent, and of 19 uuweighed samples 18 contained timothy and 11 sheep's 

 sorrel. Of 10 samples of alfalfa seed examined, 8 contained rib grass. A study 

 of 24 samples of timothy showed that none of the weed seeds they contained 

 were other than those of species common in Iowa. In a second lot of 30 sam- 

 ples examined, 20 contained sand and 15 red clover. 



The following average results were secured in germination tests: Red clover 

 tested in March, plump seeds 79.8 per cent, shrunken seeds 30.9 per cent ; red 

 clover tested in November, plump seeds 48.62 per cent, shrunken seeds 25.23 

 per cent ; mammoth clover, plump seeds 72 per cent, shrunken seeds 71 per 

 cent ; medium red clover, plump seeds 87.61 per cent, shrunken seeds 46.88 per 

 cent; alfalfa tested in March, plump seeds 56.91 per cent, shrunken seeds 24.16 

 per cent; alfalfa tested in November, plump seeds 20 per cent, shrunken seeds 

 10 per cent ; timothy, plump seeds 64 per cent, shrunken seeds 20.7 per cent. 



A general discussion of the impurities found in agrieultui'al seeds and an 

 alphabetical list of all impurities found in the samples examined in these 

 investigations are given. 



Soy beans, cowpeas, and other forage crops, A. T. Wiancko and M. L. 

 Fisher {Indiana 8ta. Bui. 120, pp. .',39-J,60, figs. 6).— Historical notes on the 

 soy bean and cowpea ai*e given, the uses, value, culture, and cost of production 



