300 EXPERIMENT STATION RECORD. 



Potato vines as a fertilizer, Dexaiffe (Ind. Lail., 21 {1S9G), No. 37, pp. 290, 291). 



On liming, IIofdefleiss (Alitt. dent. Janihv. Ges.. 11 {1896), No. 13, pp. 143-145). 



Commercial fertilizers, H. A. Huston and W. J. Joxes, Jr. {Purdue University 

 Special Bui., Aug., 1S9G, j'P- S). — Brief statements regarding tLe fertilizer trade in 

 Indiana and the quality of the fertilizers sold in that State during the year, with 

 tabulated analyses and valuations of 397 samples of fertilizing materials. 



Analyses of commercial fertilizers, ]SI. A. Scovell, A. M. Peter, and H. E, 

 CuiJTis {Kenfucli/ Sta. Bui. 64, pp. 83-96). — Tabulated analyses and valuatioDS of 127 

 samples of fertilizing materials, accompanied by explanatory notes. 



Analyses of fertilizers, F. W. Morse {New Hamp,shire Sta. Bpt. 1894, pp. 117, 

 118). — Tabulated analyses of 8 samples of wood ashes and 1 each of Orchilla guano, 

 fine ground bone, sheep manure, and muck. 



Fertilizer analyses, H. B. Battle {North Carolina Sta. Special Bui. 38, pp. 4). — 

 Tabulated analyses and valuations of 49 samples of fertilizers. 



Fertilizer analyses, H. B. Battle {North Carolina Sta. Bui. 124, pp. 31). — This is a 

 siimmary (including tabulated analyses and valuations) of the work of the fertilizer 

 control of North Carolina during the spring and fall of 1895. 



FIELD CROPS. 



Experiences in rational coffee culture, F. W. Dafekt [Erfahr- 

 ungen iiber rationeUen Kaffeehau. Berlin: Paul Parey^ 1896, pp. 36, Jigs. 

 8). — This publication contains a sliort account of the experience in 

 coffee culture of the Agricultural Institute of the State of Sao Paulo, 

 in Campinas, in the years 1888 to 1895. The following topics are 

 considered: The limits of yield of a coffee plantation, on what does it 

 depend, and how can it be increased "? Under the last head are included 

 questions of manuring from a theoretical and practical standpoiut. 



The coflee tree begins to bear about the fourth year, reaches its 

 maximum from the fourteenth to the eighteenth year, and then usually 

 declines. The oldest tree known to the author has passed its sixtieth 

 year without showing the api^earance of old age, while others begin to 

 decline from the twentieth to the thirtieth year. The yield per tree 

 varies from | lb. on an exhausted soil to 3 lbs. 15 oz. on a virgin soil, but 

 these numbers maj^ vary widely. The highest yield that so far has 

 been observed with certainty on a large plantation is 16^ lbs. per tree 

 (average of ] ,200 trees). 



Cultivation of corn 3 inches deep compared with a less depth, 

 F. H. King ( Wisconsin Sta. Bpt. 1894, pp. 266-284, fig. 1). — During 4 

 consecntive seasons 13 experiments on the station farm and 7 in differ- 

 ent portions of the State have been made, aiming to establish the best 

 depth of stirring the soil in the cultivation of corn. The trial plats 

 have consisted of alternate groups of 4 rows, one set cultivated 3 in. 

 deep and the other 1^ in. deep. The comparative yields were deter- 

 mined by weighing the whole product of the 2 middle rows of each 

 group of 4, end hills being rejected. The rainfall for each season is given 

 by months and each experiment described in detail with tabulated data. 



