Complex sentence: Walnut grows best on sandy loam, loam, or silt loam type soils but will also grow well on silty clay loam soils, it prefers these soils due to the fact that these soils hold large quantities of water which the tree draws from during dry periods.
Split into simpler sentences: Walnut grows best on sandy loam, loam, or silt loam type soils but will also grow well on silty clay loam soils. It prefers these soils due to the fact that these soils hold large quantities of water which the tree draws from during dry periods.