Site suitability for Bagras (Eucalyptus deglupta Blume) under banana plantation boundary planting in Northern Mindanao, Philippines
2014
Palma, R.A. | Carandang, W.M. | Tolentino, E.L.Jr. | Visco, R.G. | Cruz, R.V.O.
The growth and development of bagras (Eucalyptus deglupta Blume) established along the boundary of banana plantations were measured and soil samples were collected to develop site index model and determine growth rate under banana-based boundary planting. Multiple linear regression analysis was used to develop growth prediction model using data from 24 temporary sample plots. Even though aspect is weakly and negatively correlated with total height (TH), this factor passed all statistical tests and included in the species' growth model expressed in the form Log Total Height (TH) = -16.07 + 0.55 (Log/Age) + 0.92 (LogpH) + 2.81 (LogAspect) R square = 0.90. The model showed that N 44 deg 59' W to due W (ASPC=270) facing plantation, with soil pH=4.30 attained a TH of 2.70 m at 1 year and 3.90 m when soil pH = 6.30. The predicted mean annual TH growth rate is 0.60 m, which ranged from 0.37 to 1.13 m. plantations oriented due North to N 45 deg W (ASPC=315) reached a TH of 4.20 (pH=4.30) to 6 m (pH=6.30) at year 1. At year 21, TH was predicted to reach 31.90 m at pH=6.30 but only 22.40 m at pH=4.30 Results indicate that establishing boundary planting with bagras in banana plantation should be directed due W to N45 deg W and in non-acidic soil.
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