1 87 HITIER, H. — Nouveau procede de destruction de la mou- 



tarde sauvage. 



Jour. Agr. T. I, (1897), p. 705. 



188 HITIER, H. — Destruction des Sanves. 



Jour. Agr. Prat. T. I, (1899), pp. 98-160. 



Duclos recommends two applications of a 15 per cent solution, or 

 one application of a 20 per cent solution. 



189 HITIER, H. — Destruction des sanves. 



Jour. Agr. Prat., n. ser. 5 (1903), p. 658. 



E. S. R. is, p. 266. 



Should be sprayed when the young plants have developed two or 

 three leaves only, for then the plants are easily killed with the 

 use of a minimum amount of solution and with the least harm to 

 the field by the horse and the spraying machine wheels. 



190 HOFFMAN, H.— Culturversuche. 



Bot. Ztg., (1875), S. 622. 



191 HOFFMAN, M. — Vertilgungversuche von Ackerunkrau- 



tern. 



Thuringer Landw. Ztg., (1903), No. 6. 



Centbl. Agr. Chem., Bd. 33, S. 69. 



S. of I. solutions worked the surest of all salts tried. Rape suf- 

 fered by spraying. 



192 HOLLRUNG, M. — Handbuch der chemischen Mittel ge- 



gen Pflanzenkrankheiten. (1898). 



193 HORNSBY, J. — Laxton Park Experiments on Charlock 



Spraying, 1899. 



Agr. Gaz. (London), Vol. 50 (1899), p. 232. 



E. S. R. 11, p. 461. 



On Barley fields 75^ to 10 per cent solutions S. of I. applied at 

 the rate of 32-40 galls, per acre were not effective. 



194 HOUDAILLE, F. & L. SE MICH ON. —Etude de I'd tat 



physique, du calcaire considere comme cause de- 

 terminante de la chlorosis. 



Rev. Vit. T. I. pp. 405, 4SS, 509. 



