522 EXPERIMENT STATION RECORD. 



Nitrate of potash vs. nitrate of soda (Southern Planter, 55 {1394), Ko. 10, p. 402). — 

 ]{ri('f rclVreiicf to exi)t'riT7ieiits of .Maercker, which have indicati-il the superiority of 

 uitrato of potash over nitrate of soda. 



Availability of phosphoric acid, 11. J. Pattehson {Md. Farmer, ISO-l, Sept., pp. 

 S3, 34). — A brief popular discussion of the availability of phosphoric acid in soils and 

 fertilizers. 



Relative values of different phosphates, of different forms of lime, and of 

 sulphate and muriate of potash, C. Sciireiber {Rev. Agron. Louvain, 3 {1S94), 

 No. 2. pp. 92-102). 



Superphosphate and slag, their relative value, E. Saillard {Jour. Agr. Prat., 

 58 {1S94), Xo. 44, pp. 794-796'). 



The economy of Thomas slag and kainit as fertilizers for meadows {Sachs, 

 landw. Ztschr., 42 {1S94), Xo. 45, pp. 537, 53S). 



The variation in value of different kinds of groiind Thomas slag, Loges {Sikhs. 

 landip. Ztschr., 42 {lS94),Xo. 43, pp. 515-517). 



Guano deposits {Amer. Pert., 1 {1894), No. 5, pp. 292, 293). — Brief notes on guano 

 in general and on the various deposits vs'hich have been exploited, especially bat or 

 cave guano found in the West Indies and in some localities in this country. 



Adulteration (agricultural fertilizers and feeding stuffs), F. H. Cripps-Day 

 {London: Stevens cj' Sons, Limited; noticed in Analyst, 19 {1894), Dec, p. 287). 



Analyses of commercial fertilizers {Massachusetts State Sta. Bui. 55, pp. 2-S). — 

 A schedule of trade values of fertilizing ingredients and tabulated analyses of 112 

 samples of fertilizing materials, including mixed fertilizers, bone, nitrate of soda, 

 cottonseed meal, sulphate of potash and magnesia, muriate of potash, wood ashes, 

 swill aslies, muck, soot, residue from water filter, and vegetable mold. 



Aanlyses of commercial and special-formula fertilizers, H. J. Wiieeleu and 

 B. L. Hartwell {Rhode Island Sta. Bui. 29, pp. 45-55). — Analyses and valuations of 

 40 brands of commercial fertilizers and 6 samples of home-mixed fertilizers are tab- 

 ulated, and the relative economy of home-mixed and factory-mixed fertilizers is dis- 

 cussed. The results of practical experience of farmers in home-mixing are rejiorted 

 to be very favorable to the practice. 



FIELD CROPS. 



The chemical development and value of red clover, H. Snyder 

 {Minnesota >Sta. Bui. 34, pp. 17-33). 



Synopsis. — The yield of dry matter was largest at the end of flowering, and of jiro- 

 teiu a little earlier. A crop of 4,360 lbs. of clover hay removed from the soil 66 

 lbs. of potash, 28.4 lbs. of phosphoric acid, and 76.4 lbs. of lime. At the time 

 of full bloom the roots on an acre weighed approximately 1,760 lbs., containing 

 39 lbs. of nitrogen, 26.7 lbs. of potash, 27.8 lbs. of phosphoric acid, and 23.6 lbs. 

 of lime. Clover when only 5 to 7 in. high constituted a valuable green manure. 

 Failure of clover on certain soils was not due to want of plant nutrients. 



Samples were taken at 5 different stages of growth: (1) When the 

 clover was 5 to 6 in. in height, and before the flower head appeared; (2) 

 24 days later, when clover was in early bloom; (3) 14 days later, when 

 clover was a little past fnll bloom; (4) at the end of the flowering 

 period; and (5) when the clover was ripe. The maximnm yield of dry 

 matter occurred at the end of the flowering stage, the maximum 

 yield of nitrogenous matter at the time of full bloom. Taking these 

 maxima as 100, the amounts of dry matter and of nitrogenous matter 



