Fertilization for substainable plant production and soil fertility...  : input of nutrients from industrial sources : spacial variability of nutrients, legislation, advisory systems 
/ 11th International world fertilizer congress, september 7-13[1997], Gent, Belgium ; ed. by O. Van Cleemput, S. Haneklaus, G. Hofman...[et al] 
. - Gent  : International scientific centre of fertilizers, 1997
. - 467 p.  ; 24 cm. 
<br/><br/><label>ISBN: </label>3933140080 
<br/><br/><label>Universal Decimal Class. No.: </label>631.45