Based on the measurement, statistics and research to the garlic clove external characteristic parameters, an automatic orientation control device of tapered spiral seed pipe type is designed based on the friction features of garlic cloves and which adapts to the different physical features of various garlic cloves, its parameters and structure types are determined.

Based on measuring,statistics and research on configurational characteristics of garlic clove,the key component of rotary garlic single-clove directional seed metering device is designed.

Establishment of Induction System of Garlic Clove-tip by Injection with Colchicine and Effect of Mutation;