text Ind In : K. Bouwer and W Ehlers (eds) energy saving by reduced soil tillage ..., Luxemburgh office of official publication of the European Communities (1989) : p .41-54. bibl. p. 52-54 OWERKERK, C. van TILLAGE NETHERLANDS 631.51(492) Br.631.5(492)OUWe INLIS000000000002752 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)