In addition to the selection of good varieties, the management of fertilizer and water is also critical. Walnut expert Liu Chaobin, associate professor at Lin College of Northwest Agriculture and Forestry University, said: "In fact, walnuts are not lazy crops. The so-called lazy crops are only relative to other crops. Therefore, In order to obtain high efficiency in planting walnuts, the following key points should be addressed." The first step: choose suitable varieties The choice of walnut planting varieties should consider the management level, planting density, site conditions and other factors. When dense planting and cultivation, short-stemmed varieties with early growth, short crown, and high yield can be selected, such as Liaohe No.1, Zhonglin No.5, Luguang, Fenghui, etc. When the management is more extensive, late-type walnuts can be selected. Such as Jinlong l, Jinlong 2, gift l, gifts, and so on. In the case of fine management, for example, varieties suitable for planting in Shaanxi Province can generally choose Liao Nuclear No. 1, Liao Nuclear No. 4, Xiang Ling and others. The second step: setting up a park Appropriate choice of regional planting is particularly important in light of local conditions. Walnuts in suitable areas can be used to make full use of the ecological environment and natural resources in the producing areas to lay a foundation for the development of walnuts. The average walnut is suitable for the average annual temperature of 9 °C ~ 16 °C, the extreme minimum temperature of -25 °C. “Whole walnuts require a warm and cool environment for cultivation, which is most suitable for mountain development,†Liu Chaobin said. Walnut trees like a cool climate. The northern mainland is mainly accessible by Taihang Mountain, Lüliang Mountain, southern Loess Plateau, Qinba Mountain and Yanshan Mountain. 700 - 1700 meters is relatively suitable. The soil layer should not be planted in the least barren land. Therefore, the eugenic area should be expanded and the proper area should be developed appropriately. Do not blindly plant. The third step: fertilizer and water management Liu Chaobin said that pre-emergent, post-flowering, hard-nuclear and post-harvest fruiting are the key periods for fertilization. Among them, fertilization before and after flowering is dominated by nitrogen fertilizer. According to the size of the canopy and the amount of the result, each plant is applied at a time. Urea 0.5 ~ 1.5 kg, hard nuclear phase should be potassium dihydrogen phosphate + potassium sulfate mainly in the canopy around the plant apply about 1kg, after fruit dressing, fertilizer should be mainly organic fertilizer, strain applied high-quality farmyard fertilizer 200 ~ 250kg. Based on conservation and improvement of moisture supply, walnuts are mainly cultivated in mountain areas, and their water supply is limited. Weeds can be used as the main method, supplemented with water retention agents. Step 4: Pest control The most common hazards to walnut trees are clouded longhorn beetles, beetles, large silkworm moths, moths, moths, scale insects, black spot, anthracnose, and ulcer disease, and should be comprehensively controlled. Liu Chaobin suggested: (1) After defoliating and clearing the park before freezing, the dead branches, fallen leaves, weeds, etc. should be cleared out of the park, scraping the old cracked skin, and reducing the number of disease and insect overwintering bases. (2) When the pests occur, black light is set in the field to trap and kill moth pests. (3) Combine pruning and cut pests and branches. (4) Autumn trunks are painted white to prevent insects from spawning; branches are tied to grass to induce pests to lay eggs and concentrate on burning. SHANDONG JOIN & SHARE AGRICULTURAL DEVELOPMENT CO., LTD , https://www.joinsharemushroom.com