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Cilt sonuçları
Performance of commercial corn hybrids in Illinois, 1962-1964
W. D. Pardee · University of Illinois College of Agriculture Cooperative Extension Service
26 sayfa · 1965
Hybrid corn
The Role of seed certification in the seed industry
M. B. McDonald, W. D. Pardee · Crop Science Society of America
46 sayfa · 1985
Seeds / Congresses / Seed industry and trade / Certification