Two-grade and five-grade primary school students and undergraduates,who didn t have any formal knowledge of Korean language,were chosen as subjects to investigate age effect on non-native phoneme learning.

The results indicated that both a strong practice effect and an age effect were found in the visual feature retrieval process.

The results indicated that in the two main subsystems that were involved in visuospatial relation encoding and judgment, there were both a strong practice effect and an age effect.

The effect of age is a focus in the prospective memory field.

The author draw a conclusion from annual effect analyse that extend row and lower density is one of effective ways adding bolls forming and reduce bolls drop.

Except sum of the branch roots and the diameter of the longest root,the cyclophysis was found in time for callusing and rooting, sum of the adventitious roots,length of the longest root,total length of the roots and root .