Soil-Site Specific Response of E. Grandis to Repeated Fertilization in Colombia.

Frequency of fertilization on mid-rotation Eucalyptus grandis plantations was evaluated on 9 sites in Colombia. After fertilization, maximum monthly growth response reached up to extra 4 m³ha^-1 with a duration of four years at the most reponsive sites. The cummulative volume for a six year old responsive stand was 420 m³ha^-1 compared to 280 m³ha^-1. Site specific responses of fertilization indicated that low productivity sites surpased previously considered highest productivity sites when fertilization was applied.