1 Subjects: “...oilseed crop...”

2 Subjects: “...crop production...”

3 Subjects: “...fibrous crop...”

4 Subjects: “...crop wild relatives...”

5 Subjects: “...crop wild relatives...”

6 Subjects: “...crop wild relatives...”

7 Subjects: “...mixed cropping...”

8 Subjects: “...inter- and mixed cropping...”

9 Subjects: “...cropping pattern...”

10 Subjects: “...cropping pattern...”

11 “... of the International Cooperative Program on Effects of Air Pollution on Natural Vegetation and Crops (ICP Vegetation...”

12 “... of crops, populations and technologies. They were and remain a locus for cultural interaction...”