00532nas a22001213  4500008004100000245017700041260007600218300002300294650002700317650002600344700002100370700001900391880608u        xx  u         0  0 0und  00aMechanization of Field Experiments in Semi-arid Areas.bProceedings of a regional conference 23rd-27th, 1987cInternationa Centre for Agricultural Research in the Dry Areas  aNorway;bNorwegian Institute of Agricultural Engineering (NIANE)c1987,  aviii, 237p.:bill.  aAgricultural machinery  aAgriculturevResearch  aDiekmann Jurgen   aKarlsson Doris