This study was carried out in order to survey the soil physico-chemical, morphology and content of saponins of 5 year-old Platycodon grandiflorum radix from different areas in Gyeongnam. Soil physical properties was showed 1.01-1.29 of bulk density of soil and soil hardness was increased with increasing soil depth, especially below the 30 cm, however it was maintained or small increased below the 40 cm. T-N and OM contents of top soil were highest at Geochang as 0.27% and 56.9 g/kg, respectively, compared to other areas. The root length was longer at Kimhea and Geochang as 33.8 and 33.7 cm, respectively, and fresh weight was heavy at Geochang as 208.5 g. The contents of saponin of P. grandiflorum radix was higher in fine root compare to main root. By region, content of saponins of P. grandiflorum radix were higher at Hapcheon than other area. Mg content was highly negatively correlated at p ＜ 0.01 with platycodin D3, deapioplatycodin D, platycodin D, and deapioplatycodin D (-0.499**, -0.433**, -0.421**, -0.511** respectively). These results suggest that no-fertilized Mg effected on the improvement of saponin contents in P. grandiflorum.

This study was carried out to investigate the improvement of soil physical and chemistry in black raspberry sequential field. We had used the subsoil-crusher, oriental herbal, perlite, popped rice hull, burned charcoal of rice hull and peat moss as a soil conditioner. On the whole, the physical and chemistry properties of treated-plots was higher than those of Control field after applying soil conditioners. Before planting, the pH and E.C. range of field was 4.9~5 and 0.5~0.6 ds/m, respectively. After applying soil conditioners, the pH and E.C range of Control field was altered to 4.3 and 2.2ds/m and the pH and E.C range of peat moss-field was 5.2 and 1.3 ds/m. The significant difference(p<0.05) in pH and E.C value was observed between Control-field and peat moss-field. In the size of soil aggregate structure, the aggregate structure weight of Control over 4mm long was 44 g and treatments of perlite, popped rice hull, burned charcoal of rice hull and peat moss was 53 g, 65g, 65g and 72g, respectively. There is a significant difference(p<0.05, 0.001) between Control and treatments. In the results of chlorophyll analysis, all of the treated-plots except for the oriental herbal have a high chlorophyll value (p<0.05, 0.001) compared to the Control. In view of the results so far achieved, there is a great difference on the frequency of dead plant between Control and treatments. The dead plants number of Control, subsoil-crusher, oriental herbal, perlite, popped rice hull, burned charcoal of rice hull and peat moss was 31, 21, 7, 12, 10, 12 and 2, respectively.