24 EXPERIMENT STATION RECORD. [Vol.41 



sand, soy beans, when inocculatefl and supplied with available phosphates and 

 lime gave practically as good yields on the checks as on the marl-treated pots up 

 to the time the pods were about one-half filled, although when allowed to mature 

 there was an appreciable falling off in the yield of seed on the check pots, the 

 yield of stalks being about the same on the check pots as on the treated pots. 

 Dry matter (soy bean hay) from check pots and from marl-treated pots con- 

 tained quite as high a percentage of nitrogen as that from pots treated with 

 a soluble potash salt (K2SO4). The amount of potash in dry matter (soy bean 

 hay) from pots treated with soluble potash was notably higher than in that 

 from marl-treated pots or check pots, but is said to represent a " luxury " con- 

 sumption since the yield of dry matter and percentage of nitrogen are not thereby 

 increased. 



The results secured are held to indicate that there is a very close connection 

 between the presence in the soil of soluble phosphates and the accumulation 

 of nitrogen by the soy bean plant. It was also shown that soy beans, when in- 

 oculated and furnished with lime and soluble phosphate, can make a good 

 growth and accumulate a high percentage of nitrogen, up to the time the pods 

 are half filled (hay), without the aid of readily soluble potash compounds. 



"The work suggests the possibility of utilizing the potash of greensand marl 

 and the potash of natural soil materials by growing soy beans and possibly 

 certain other crops, which could be returned to the soil and thus furnish avail- 

 able potash for those crops which can not so readily utilize potash from these 

 natural sources." 



The world's supply of potash, C. Matignon (Rev. Set. [Pari>i], 57 {1919), 

 No. 8, pp. 225-230). — This is a general discussion of the potash content of the 

 earth's crust, the disintegration of potash-bearing rocks, the solution and 

 removal of potash salts to the sea, and the formation, character, and extent 

 of potash deposits. 



The use of lime on Iowa soils. Limestone and fertilizer dealers, G. E. 

 Corson {Iowa Sta. Circ. 58 (1919), pp. 7). — This comprises a brief popular 

 account of the value of lime for correcting soil acidity, together with results 

 of tests and other information relating to the form, amount, and method of 

 applying lime. A list of limestone and fertilizer dealers is included. 



Fertilizer analyses, A. J. Patten, C. F. Baknum, E. F. Bergek, A. L. Lewis, 

 and M. L. Grettenberger (Michigan Sta. Bui. 283 (1918), pp. 3-48).— This 

 reports the actual and guarantied analyses of 863 samples representing 279 

 brands of commercial fertilizers and fertilizing materials collected during 

 1918. It is stated that 6.3 per cent of the samples were below the guaranty 

 in nitrogen, 0.6 per cent in total phosphoric acid, 6.4 per cent' in available 

 phosphoric acid, and 11.4 per cent in potash. 



Analysis of fertilizers for 1918, B. E. Curry and T. O. Smith (New Hamp- 

 shire Sta. Bui. 189 (1918), pp. iO).— This reports the results of the actual and 

 guarantied analysis of 147 official samples of commercial fertilizers and 

 fertilizer materials collected during 1918. 



Analyses of commercial fertilizers, fertilizer supplies, and home mixtures, 

 C. S. Cathcart et al. (Ncid Jersey Stas. Bui. 331 (1918), pp. 5-47).— This bul- 

 letin contains a report on the actual and guarantied analyses of 204 brands 

 of complete fertilizers, 274 brands containing nitrogen and phosphoric acid, 

 5 home mixtures, and 114 samples of fertilizer materials collected during the 

 spring months of 1918. 



Analyses of commercial fertilizers and ground bone; analyses of agricul- 

 tural lime, C. S. Cathcart et al. (New Jersey Stas. Bnl. 33.'/ (1918), pp. 

 5-42). — Supplementing the report noted above, the remaining analyses of sam- 

 ples of commercial fertilizers and fertilizing materials collected during the 



