The soil pH should be 6.0 to 7.0. If necessary, apply lime and incorporate it into the soil along with other pre-plant fertilizers. Green manure crops improve the soil and can also be used to reduce weed problems. Summer cover crops such as hybrid sudan grass, cow peas, or mung beans and winter cover crops such as wheat, annual ryegrass, or crimson clover may be utilized. After the orchard is established, a permanent sod such as fescue, white clover, or native annual and perennial grasses work well.
Irrigation improves tree establishment and can increase productivity.
Trickle irrigation, movable or solid set sprinkle irrigation, or traveling gun irrigation systems all work well for pecans. If irrigation is planned, an adequate water source and properly designed system is essential. Selecting the Right Cultivars There is no one best cultivar. Each recommended cultivar has both strong and weak points. At least four cultivars should be planted to insure proper pollination and also to guard against crop failure.