I nÙ RECENTI STUDI SULLA NITRIFICAZIONE 
61 
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Con questa rivista si è iniziata la ripresa in esame della letteratura 
sull’argomento a partire dalla data dello scoppio della guerra euiopea. 
Tale esame sarà proseguito e, con le opportune note critiche, saià, fi a 
breve, posto in relazione con alcune nostre ricerche sperimentali in corso. 
R. Perotti. 
BIBLIOGRAFIA 
4 
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(2) W. P. Kelley, The Lime-Magnesia Ratio: II. The Effects of Calcium, 
and Magnesium Carbonates on Nitrification. Cent, fiir Bakt. II. Bd. XLII, (1914), 
ii 21 “22 p 5TT* 
(3) F. M. Scales, Relation of Lime to Production of Nitrates and mineral 
Nitrogen. Cent. f. Bakt. II, Bd. XLV, (1916). n. 13-17, p. 378. 
(4) Ch. Barthel, Beitrag zur Frage der Nitrification des Stallmiststickstoffes 
in der AcTcererde. Cent. f. Bakt. II. XLIX (1919), n. 14-17, p. 382. 
(5) C. B. Wright, The Influence of certain organic Materials upon the 
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(3) J. E. Greaves a. E. G. Carter, Influence of barnyardmanure and 
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(7) Guillin, Studiai iiber Nitrification der verschiedenen zu landwirtschaf- 
tlichen Zwecken angebotenen Ledersorten und des geschwefelten Rapskuchens. 
Intern, agr.-techn. Rundsch. Bd. 7, (1916), p. 735-739." 
(8) F. Lòhnis u. H. H. Green, Ueber die Entstehung und. die Zersetzung 
von Humus , soivie iiber dessen Einwirkung auf die Sticks toff- Assimila turn. 
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