1. Cultivation techniques: 1. Planting time: Walnut is suitable for growing on warm sandy loam and black loam with deep soil layer and good drainage, and should be planted on sunny slopes and leeward places. To develop walnuts in barren hills, we must first build terraces, dig large fish scale pits and do a good job in soil and water conservation.

Planting time: early planting in spring after soil thawing, early planting in autumn after defoliation and early planting after soil freezing, and early planting in autumn before soil freezing after defoliation. In arid areas in spring, autumn sowing has a higher survival rate than spring sowing.

The second spring sprouted early and grew strong. Seedlings planted in autumn should be ridged to prevent drainage. Methods: The trunk of seedlings was bent into an arch to fix the soil, and the trunk was not exposed. The next spring, I broke through the ground and straightened the trunk.

2. Planting method: the taproot of walnut seedlings is very long, and the pit depth and width are 0.8- 1 m respectively. First, fill the topsoil and base fertilizer at the bottom of the pit, about 20 cm away from the pit surface. When planting, use scissors to cut off the seedlings with soaked roots and sufficient water absorption, put them vertically in the into the pit, and then fill the soil steadily until it is flush with the ground, then fill them with water and seal the soil.

Second, shaping and pruning: it is very important to make walnuts bear fruit early and have high and stable yield, and reasonable shaping and pruning are very important cultivation techniques. The pruning period of walnut is different from that of ordinary fruit trees. This is done after the fruit is picked and before the leaves turn yellow. In North China, it is best to prune between "white dew" and "cold dew". Pruning at this time, although the temperature is low, the wound heals slowly, but the nutrient loss is less. Young trees can be pruned early because they have no fruit, and they can start from the "Summer Festival". Spring pruning is generally carried out around the "long summer". It's too late, because the branches and leaves are too big and consume too many nutrients, which is not conducive to the growth of trees.

1, young tree pruning: mainly to cultivate tree skeleton, lay a good foundation, quickly expand crown, and promote early fruiting and high yield. The tree shape of walnut is generally sparse and scattered, natural and happy.