PhilRice

Soil Series

Information System

0-10
10-24
24-55
Aroman Series
Soil Fertility Moderate
Soil pH Slightly acid (5.5-6.2)
Organic Matter Low to moderate
Phosphorus (P)
Potassium (K) Low to high
Nutrient Retention Low to moderate
Base Saturation Moderate
Salinity Hazard None
Physical Soil Quality
Relief Rolling to mountainous
Water Retention Moderate
Drainage Poor to moderate
Permeability Moderate
Workability/Tilth Moderate
Stoniness Few gravels in the surface; abundant black Mn concretions
Rooting Depth Moderate to deep (?1m)
Flooding None
Erosion Severe
Surface Soil Type: Clay loam
Family name: Fine-loamy, montmorillonitic, isohyperthermic, Typic Hapludalf
An old soil which has undergone extensive weathering but has retained a high base status alf Alfisol has minimum complexity in its horizonation hapl It has a fine loamy texture with more than 15 fine sand and 18 35 clay It is found in areas with humid climate that have well distributed rainfall ud udic with 7 months wet and 3 months dry thus have an adequate supply of moisture for crop growth The mean temperature is higher than 22C isohyperthermic