000			02358nam a22002177a 4500
003			UPMIN
005			20221213110109.0
008			221110b |||||||| |||| 00| 0 eng d
040			_cUPMin
100			_9156 _aVillason, Nelvin A.
245			_aPhysico-chemical characteristics of soils under cacao production system in Davao de Oro, Philippines
260			_aIñigo Street, Davao City, Philippines 8000 _bUniversity of Southeastern Philippines _cMarch 2020
300			_atables; maps
520	3		_aThe study was conducted to understand the physico-chemical characteristics of the soils under cacao production system in Davao de Oro, Philippines. Eight (8) cacao farms were selected for detailed field characterization and sampling of soils for various nutrient analyses. Fertility status of each selected farm was determined by comparing the fertility properties of each soil with the critical nutrient level requirement for cacao. Results showed that most of the soils have a dark brown soil color in the upper horizons, and dark, yellowish-brown in the lower horizons. They range from moderately deep to very deep soil profile (19 to 150 cm), with very friable to extremely firm when moist, slightly sticky to very sticky, and slightly plastic to very plastic when soil consistence is wet. Lower elevations had shallow solum with high water table, resulting in the development of mottles and redoximorphic properties. The amount of clay ranged from 9 to 37%, with 18 to 40% for silt, and 30 to 68% for sand. Most of the cacao farms were intercropped with coconut, durian, lanzones, rubber, and banana. Most of the soils are moderate to slightly acidic, with pH values <6.5 and CEC ranging from 10 to 34 meq/100g. Moreover, most of the areas have low organic matter (1.66%) except for the areas which continually applied organic matter during fertilization (4.60%). The amount of nitrogen (N) is optimum; however, phosphorus (P) was generally deficient in the soils of most cacao farms surveyed, while amount of potassium (K) ranges from 41.30 to 375.60 mg/kg.
650		0	_aCacao _9157
650		0	_aCacao growing _9158
650		0	_aMindanao studies _9120
700			_9159 _aOlguera, Dernie T.
773			_x0117-6293 _tThe Southeastern Philippines Journal of Research and Development _013212 _gVol.25, No.1 (March 2020), 115-134
942			_2lcc _cAT _n0
999			_c13234 _d13234