HILLMANN, P.— Die Ergebnisse der Umfrage Vetreffend 

 die Unkrautvertilgung. 



Jahrb. Deut. Landw. Gesell., (1902), S. 184. 



HILLMANN, P.— Die Hederichbekampfung durch Besprit- 

 zen mit Saltzlosungen. 



Deut. Landw. Presse, Bd. XXIX, S. 214. 



HILLMANN, P.— Die Bekampfung des Hederich durch Be- 

 spritzen mit Salzlosungen. 



Mitt. Deut. Landw. Gesell. (1903), No. 16, S. 80, 84. 



HILLMANN, P. — Die Bekampfung des Hederichs durch 

 Bespritzen mit Salzlosungen. 



Mitt. Deut. Landw. Gesell., (1902), S. 24. 



Thistles injured but some recovered. Very few Clover plants killed, 

 i.e., Trifolium species. With Medicago species (Luzerne and Yel- 

 low Clover) more killed. Lupines blackened but not permanently 

 injured. 



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

 tarde sauvage. 

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



HITIER, H. — Destruction des sanves. 



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



Duclos recommends two applications of a 15 percent solution, or one 

 application of a 20 per cent solution. 



HITIER, H. — Destruction des sanves. 



Jour. Agr. Prat., u. ser. 5 (1903), p. 658. E. S. R. 15, 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. 



HITIER, H. — Destruction des sanves. 



Jour. Agr. Prat. (1899), T. II, p. 98. 



Gives as the best time for spraying the time when the first four or 

 five leaves are out and well opened. 



HOFFMAN, M. — Vertilgungversuche von Ackerunkrautern. 



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 suffered 

 by spraying. 



