Effects of Biochar, Lime, and Compost Applications on Soil Physicochemical Properties and Yield of Pomelo (Citrus grandis Osbeck) in Alluvial Soil of the Mekong Delta

Table 5

Multiple regression models between fruit yield and soil properties (n = 48).

Equations	R^2
Surface layer (0–20 cm)
FY = 0.33 + 3.79 × pH + 0.21 × SOM–1.98 × Ca + 10.8 × K + 3.59 × Mg − 17.1 × BD	0.71	<0.01
Subsurface layer (20–40 cm)
FY = −29.2 + 4.64 × pH + 1.90 × SOM − 0.21 × Ca + 2.09 × K + 1.11 × Mg + 9.90 × BD	0.74	<0.01

FY, fruit yield; SOM, soil organic matter; BD, bulk density.