This paper studied the seedling transplantation summer maize's growth patterns, which was planted in the irrigatal and fertile land of central area of Shanxi province.

Cause of formation of cotton seedlings with high and slim stems nursing with nutrition bowl, and nursing in floating system were expounded, and precautionary measures were provided.

Taking the research of the cavity of vacuum forming mould used for the nutritional box to grow seedlings as example. This paper introduces the new technology of liquid die forging of Zn base alloys?