Soil Management

Maintaining orchard soil health is a fundamental priority of profitable walnut growers.

Good tilth and optimal organic matter content receive constant attention. The California Walnut Board’s research funding commitment to IPM (e.g. alternatives to soil fumigation, disease resistant rootstocks that don’t require pesticide protection, reduced pesticide sprays) has beneficially protected the soil biosphere.

Fig. 9. Herbicide treated, non-cultivated walnut orchard using a double line drip irrigation system. 


Fig. 10. Cover cropped walnut orchard