00322    a2200097   4500082001500000245005900015260005500074300001600129650004000145650003900185  a630.7bAGR  aAgricultural yield potentials in continental climates   aWarsawbInternational Potash Institutec1981g1981  a295p.c23cm  aEducation, research, related topics  aAgriculture and related technology