Soil Properties and the Abundace of Ironwood (Eusideroxylon zwageri Teijsm.& Binn.) Varieties In Jambi, Indonesia

Two series of a study on the correlation between soil properties and distribution of ironwood (Eusideroxylon zwageri\udTeijsm.&Binn.) varieties had been conducted in Senami, a natural foreststand, Jambi,Indonesia. The firstwas using\udpurposive random sampling. The samples were taken from the locations where the E. zwageri varieties naturally\udgrow in the depth of 0–30 cm and 30–60 cm. The number of composite samples was 18 which were analyzed for\udchemical soil properties. The second study was conducted using systematic sampling where 64 soil cores were\udcollected from 3 different soil depths namely 0–20 cm, 20–40 cm, and 40–60 cm. The physical soil properties were\udanalyzed from the 64 soilsamples. The research resultsrevealed that the drainage among E.zwageri varieties varied\udfrom poor conditionsto moderate, while the bulk density wasslightly different, from very lowto low. The results also\udshow that E. zwageri varieties are able to grow in almost any soil textures. There is no specific correlation between\udchemical soil properties and distribution of E. zwageri varieties. All varieties grow at almost the same condition of\udchemicalsoil properties except var. grandis.\u