390 STENDER, A. — Vertilgung gewisser Ackerunkrauter 



durch Metallsalze. 



Mitt. Landw. Inst. Breslau, Bd. Ill, (1900), S. 73. 

 Jahresber. Agr. Chem. Bd. XLIII, S. 353. 

 Treated under six heads : 



1. By what salts are Charlock and Mustard most injured? 



2. What is best concentration for a spray? 



3. What is best time for spraying? 



4. Is it necessary to repeat spraying? 



5. What useful plants are injured and to what extent? 



6. What is the physiological reason for death 7 



Well developed Red Clover and Peas did not show injury. 

 Beans were badly injured. 



391 STOCKLASA, J.— Die Physiologische Funktion des 



Eisens im Organismus der Pflanze. 



Compt. Rend. Acad. Sci., (Paris), T. 127, (1898) p. 282. 



392 STOHMANN, ( ).— (Chlorosis.) 



Agron Ztg. v. Hamm, (1864), S. 325. 



Exact researches have established the action of iron in Chloro- 

 sis and shown that the greening, begins in and spreads from the 

 ribs. 



393 STRAUCH, ( ).— (Hederichvertilgung.) 



Ztschr. Landw. Kammer Schlesien, (1898), S. 881. 



394 SUCCI, A. — Azione del ferro sulla vegetazione. 



Rass. Con. An. II, (1888), pp. 243-249. 



May be said that the use of S. of I. requires a special soil in 

 order to produce good results, and even then an excess will be 

 injurious. 



395 SUTHERST, W. F.— The effect of Lime on the Insolu- 



ble Phosphates in Soils. 



Chem. News, Vol. 85, (1902), p. 157. 



396 SUZUKI, S.— Uber die giftige Wirkung von kaliumferro- 



cyanid auf Pflanzen. 



Bui. Col. Agr. Tokyo Imp. Univ., Vol. 5, No. 2. 



Centbl. Agr. Chem, Bd., 32, S. 354- 



Following work of Knop. Looks as though potassium ferro- 



cyanide is not a source of iron for chlorophyll plants. 



