4G1 



General fertilizer experoients, W. H. Caldwell, B. S. (pp. 

 137-158). — This is a report of progress in a series of rotation experiments 

 commenced in 1881 to study the eifects of the different fertilizing ingre- 

 dients used singly and combined, with reference to permanency, total 

 yield of crop, relations of parts of plants, etc., as reported in the Annual 

 Eeport of the station for 1888 (see Experiment Station Bulletin No. 2, 

 part II, p. 132). The yields are tabulated for each of the 36 eighth-acre 

 plats, as well as the gain of the fertilized over the unfertilized plats. 

 No conclusions are drawn, as the experiment is to be continued. 



Comparative value of different forms of phosphoric acid, 

 H. P. Armsby, Ph. D., and W. H. Caldwell, B. S. (pp. 159-161).— 

 Since 1883 an experiment has been in progress at the station on 12 

 twentieth- acre plats — 



For the purpose of comparing the effects of the three commercial forms of i>lios)>li()ric 

 acid, namely, solubh^, reverted, and insoluble, and also of ground l}one, upon the 

 ordinary four-course rotation of this section — corn, oats, wheat, and grass. [A pre- 

 vious report may be fionnd in the Annual Report of the station for 1888, see Exper- 

 iment Station Bulletin No. 2, part ii, p. 132.] * ^^ * 



The present report is intended to record simply the results obtained during tho 

 past year [1889] and a sunmiary of all the results to date, without entering into all 

 the details of the experiment. In 1889 the plats were in grass. * * * 



So far as the relative value of the different forms of phosphoric acid is concerned, 

 the results of this year giA^e us little information, since they are quite discordant in 

 the two series. The average results of such an experiment for a series of years are 

 likely to be more trustworthy than those obtained in any single year. » * * 



[The total yields from 1884 to 1889, inclusive, indicate that] upon our limestone soil 

 the ground bone has given the best results. This may be due in part to the small 

 amount of nitrogen contained in the bone in addition to its phosphoric acid. With 

 the other three forms the effect seems to be inversely as the solubility, that is the 

 less soluble the phosphoric acid the greater has been its effect in these experiments 

 thus far. 



It is the intention to continue these experiments through a series of years, so as to 

 study the cumulative effect of the manuring. 



Systematic testing of new varieties — germination tests, 

 G. C. BuTZ, M. S. (pp. 162-165).— A reprint of Bulletin No. 8 of the 

 station (see Experiment Station Eecord, vol. i, p. 295). 



Should farmers raise their own vegetable seeds? G. C. 

 BuTZ, M. S. (pp. 166-170). — This article was also published in Bulletin 

 No. 10 of the station (see Experiment Station Record, vol. ii, p. 28). 



Notes on new varieties of vegetables, G. C. Butz, M. S. 

 (pp. 170-177). — This article was also published in Bulletin No. 10 of the 

 station (see Experiment Station Eecord, vol. ii, p. 29). 



Experiments on the production of root tubercles, W. A. 

 BucKHOUT, M. S. (pp. 177-181). — These were in continuation of the 

 experiments reported in the Annual Report of the sitation for 1888 (see 

 Experiment Station Bulletin No. 2, part ii, p. 134). 



The first was undertaken [in April] in a small cold frame in the open air, the 

 other two in the greenhouse during the winter. The first comprised twelve tumblers 

 for water cultures and twenty-four 4-inch pots for sand or soil. In the water 



