Assesment of fertilizer nitrogen requirement of potatoes and sugar beet text Wageningen International Agrarisch Centrum 1989 Ind 41 p. : ill. ; 20 cm. 41 p. : ill. ; 20 cm. Thesis (Dr.)-Landbouwhogeschool te Wageningen, 1989. NEETESON, J.J. POTATOES NITROGEN FERTILIZERS SUGAR BEET NITROGEN FERTILIZERS 635.21-184 635.21-184NEEa INLIS000000000003001 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)