530 EXPERIMENT STATION RECORD. 



Injuries to plants by coal tar vapors from the Plania works at Eatibor, 

 E. EwEKT (Ber. K. Lehranst. Ohst u. Oartenhau Proskau, 1911, p. 76. In 

 Landic. Jahrb., ^3 {1912), Ergmzungsb. 1). — This is a discussion of the effect 

 of gases from the manufacture of carbon pencils condensing on the neighbor- 

 ing vegetation. The gases are said to be injurious to fruit trees, bush beans, 

 potatoes, and cabbage, but harmless to many other plants. Further studies 

 will be published later. 



FIELD CROPS. 



[Field crop experiments], J. A. Clark {Ann. Rpt. Dept. Agr. Prince Edward 

 Island, 1911, pp. 26-82). — This paper reports the results of various tests during 

 1910-11, of which some of the highest yields per acre were wheat 48.49 bu., 

 oats 136 bu., barley 80 bu., 2-rowed barley 83 bu., peas 44 bu., potatoes 330 bu., 

 corn 30 tons, turnips 33 tons, carrots 15 tons, mangels 36.5 tons, and sugar 

 beets 21 tons. 



[Field experiments], R. M. Wilson {Essex Ed. Com., Rpt. Field Expts., 

 1911, pp. Jflf, figs. 10). — This report contains results of variety tests with wheat, 

 barley, oats, potatoes, mangels, thousand-headed kale, maize, sugar beets, Chi- 

 nese barley, linseed, and Western and wolths grass. The yield of sugar beets 

 averaged 9 tons 8.27 cwt. per acre, the sugar content ranging from 14.9 to 17.5 

 per cent. Canadian varieties of maize averaged 11 tons 10.88 cwt. per acre in 

 comparison with 8 tons 17.71 cwt. from English varieties. 



Sure feed crops, J. Fields {Oklahoma City, Okla., 1912, pp. 18S). — This book 

 contains discussions of the principal grain, forage, and pasture crops especially 

 adapted to the southwestern United States. 



Experiments on permanent grass land, 1912, E. Kinch and R. G. Staple- 

 don {Agr. Students' Gas., n. scr., 16 {1912), No. 1, pp. 1-12). — This report gives 

 tabulated results and discussions of the 1912 yields in an experiment which has 

 been running for 21 years. In fertilizing grass land superphosphate was gen- 

 erally found to be the best phosphatic manure in a calcareous district, and 

 basic slag where lime was deficient. Where buttercups were very plentiful, 

 fertilizing with sulphate of ammonia and ashes greatly diminished them. 



Manuring' experiments on grass for hay, E. Kinch, D. Turnek, and R. G. 

 Stapledon {Agr. Students' Gaz., n. ser., 16 {1912), No. 2, pp. 43-57). — In com- 

 paring 4 cwt. of superphosphate and 1 cwt. of potassium sulphate together and 

 in combination with 1.5 cwt. ammonium sulphate per acre in experiments con- 

 ducted on different farms in Gloucestershire, it was found that in general the 

 potash and phosphoric acid alone apparently more than doubled the percentage 

 of stand of legumes. The addition of the ammonium sulphate depressed the 

 yield of legumes veiy slightly and caused a falling off of over one-half of the 

 buttei'cup plants as well as of other weeds. Perennial rye grass and meadow 

 foxtail were greatly increased by the addition of the ammonium sulphate. In 

 an experiment to compare the value of 2 cwt. of ammonium sulphate in addi- 

 tion to 4 cwt. superphosphate and 4 cwt. kainit per acre with mangolds, the 

 ammonium sulphate application resulted in an increased yield of from 3 to 5 

 tons per acre. 



Manurial experiments on meadows, with special reference to the lasting 

 effect of the applications, E. Hotter, J. Stxjmpf. and E. HerrMxVNN {Ztschr. 

 Landw. Versuchsiv. Osterr., 15 {1912), No. 2, pp. 133-1^6). — This paper reports 

 the use of the following fertilizer applications per hectare of grassland for 

 the first year, and the effects as observed for the 4 succeeding years: 480 

 quintals (53 tons) barnyard manure. 700 kg. Thomas slag, 1.420 kg. kainit, 

 240 kg. ammonium sulphate. 345 kg. potassium sulphate, 700 kg. calcium sul- 

 phate, and 300 kg. straw ashes, either singly or in combination. 



