220 EXPERIMENT STATION RECORD. IVol. 36 



duction of 1914 . . . this was a decrease ... of nearly 33 per cent, and in 

 value . . . nearly 44 per cent." 



The conservation of phosphate rock in Tennessee, W. C. Phalen (Resources 

 Tenn., 6 {1916), No. 4, pp. 193-216, figs. 5).— This article deals with the occur- 

 rence and distribution of phosphate deposits in Tennessee and describes specific 

 examples of modern ways and means of conserving phosphate rock as practiced 

 in the Mount Pleasant, Tenn., field. 



The limestones of the Canterbury Province, R. Speight {Jour. Canterbury 

 Agr. and Past. Assoc, 3. ser., 4 {1916), pp. 5-16, figs. 7). — This article describes 

 the occurrence, distribution, and composition of the limestones of the Province 

 in New Zealand. Analyses of three different limestones from the Province 

 show calcium carbonate contents of 88.64, 82.26, and 67.6 per cent. 



Sodium chlorid.as a fertilizer, P. Bolin {K. Landtbr. Akad. Handl. och 

 Tidskr., 55 {1916), No. 5, pp. 36S-376; Meddel. Centralanst. Forsok^v. Jord- 

 bruksomrddet, No. 131 {1916), pp. 3-11; abs. in Chem. Abs., 10 {1916), No. 17, 

 pp. 2268, 2269). — Field experiments with sugar beets and potatoes are re- 

 ported, the results of which are taken to indicate that common salt when added 

 to the fertilizer used did not decrease the dry matter in the crop. On the other 

 hand, it is concluded that the amount of dry matter is no less with sodium 

 chlorid than with potassium chlorid, but is increased at about the same rate 

 by both salts. 



Fertilizer experiments with manganese dioxid used on grain, R. Ricci and 

 G. Baebeea {Staz. Sper. Agr. Ital., 48 {1915), No. 9, pp. 677-689; abs. in Chem. 

 Abs., 10 {1916), No. 18, p. 2382). — Experiments with wheat on the use of man- 

 ganese dioxid alone, with sodium nitrate, and with ammonium sulphate at the 

 rate of 300 lbs. per hectare (about 121 lbs. per acre) are reported. 



The greatest yield of grain was obtained where manganese dioxid was used 

 with sodium nitrate, and the yield with manganese dioxid alone was next. 

 There was no apparent advantage in the use of manganese dioxid with am- 

 monium sulphate. No great difference was observed in the yield of straw, but 

 the manganese dioxid alone seemed to act as a depressant. 



Eight references to literature bearing on the subject are appended. 



How to remedy the scarcity of fertilizers, E. Miege {Comment Remedier a 

 la P&nurie des Engrais. Paris: J. B. Baillidre & Sons, 1916, pp. 59). — This 

 pamphlet discusses the scarcity of fertilizing materials due to the European 

 war, and describes methods of utilizing fertilizing materials from natural 

 sources, especially green manuring; conserving crop residues; rotation of crops, 

 including legumes; proper cultivation; and the use of relatively cheap soil 

 amendments. 



Buying and using fertilizers, R. M. Salter (W. Va. Col. Agr. Ext. Dept. 

 Circ. 87 {1916), pp. 15, figs. 7). — This circular gives information on the pur- 

 chasing and use of fertilizers, with special reference to the requirements and 

 conditions of West Virginia soils as determined by the state experiment station. 



AGRICULTURAL BOTANY. 



Rolliniopsis, a new genus of Annonaceae from Brazil, W. E. Saffobd {Jour. 

 Wash. Acad. Sci., 6 {1916), No. 8, pp. 197-204, fi9S. 2).— An account is given 

 of two species of plants collected in Brazil which are considered as new forms 

 and which, with two allied forms hitherto assigned to the genus RoUinia, are 

 now assigned to a genus created for this purpose for which the name Rolliniopsis 

 is proposed. 



The occurrence of bacteria in frozen soil, E. C. Habder {Bot. Gaz., 61 

 {1916), No. 6, pp. 507-517, figs. 2).— During the winter of 1014-15 the author 

 studied the effect of cold and moisture on the number of bacteria in field and 



