Soil profile interpretation. Based on the soil profile description below, discuss the main properties of the profile, and how the soil profiles properties affect the availability of water to plant roots. (15 marks) Horizon Depth (cm) Description Particle size (%) Sand Silt Clay A1 0-10 Light brownish grey; loamy sand; single grain; loose consistence; pH (H2O) 5.6; EC1:5 0.06 dS/m; clear boundary 87 5 8 B1 10-45 Yellow; sandy loam; massive; loose consistence; pH (H2O) 4.2; EC1:5 0.06 dS/m; diffuse boundary 79 4 18 B2 45 to 100 Yellow; sandy loam; massive; very weak consistence; pH (H2O) 4.4; EC1:5 0.35 dS/m; diffuse boundary 76 8 16 B3 100 to 120+ Yellow; light sandy clay loam; massive; very weak consistence; pH (H2O) 4.4; EC1:5 0.4 dS/m; diffuse boundary - - -