良种繁育 meaning in Chinese

elite breeding
seed-breeding

Systemic study on the germplasm resources of dahurian angelica
禹白芷良种繁育技术
Improved varieties of yellow ginger breeding technique
黄姜良种繁育技术
How to construct breeding system for high quality wheat varieties
如何搞好优质麦良种繁育体系建设
Breeding of fine variety for sweet potatoes
甘薯良种繁育方法
Breeding fine strains technique of tomatoes
番茄良种繁育技术

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