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When Is the Best Time to Fertilize Walnut Trees? An Introduction to Fertilization Periods
According to the performance of fertilizers and the different fertilization periods, they can be divided into two major categories: base fertilizer and topdressing. 1. Base fertilizer: mainly composed of decomposed organic fertilizer, it is a foundational fertilizer that can supply walnuts with multiple nutrients over a relatively long period. Base fertilizer is generally applied in autumn, as early as possible during the period from after fruit harvest to before leaf fall. If there is no time to apply it in autumn, it can be applied in spring. Applying base fertilizer in autumn can promote flower bud differentiation and root growth, raise the tree's nutrient storage level, and benefit the growth of branches and leaves as well as flowering and fruit setting in the coming year. The earlier the autumn base fertilizer is applied, the better. Young walnut orchards can apply base fertilizer in combination with deep plowing, while mature orchards can broadcast it over the whole orchard and then shallowly turn the soil to incorporate the base fertilizer. After applying base fertilizer, irrigate thoroughly once.
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A Detailed Guide to Irrigation Timing and Appropriate Water Amounts for Walnut Trees
Walnut trees are tall with broad leaves, have high transpiration rates, and require a lot of water. Insufficient water can seriously affect tree growth and development as well as flower bud differentiation and nut yield. Walnuts can tolerate relatively dry air, but they are very sensitive to soil moisture conditions. Soil that is too dry or too wet
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What irrigation methods can be used in a walnut orchard?
Walnut orchards can use conventional irrigation, and water-saving irrigation is encouraged. The commonly used irrigation methods include: border irrigation, basin irrigation, furrow irrigation, hole irrigation, sprinkler irrigation, subsurface irrigation and drip irrigation, among which sprinkler irrigation, subsurface irrigation and drip irrigation are relatively advanced water-saving irrigation methods. 1. Border irrigation Border irrigation, also
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What precautions should be taken when applying rare earth micro-fertilizers in walnut orchards?
The content of rare earth elements in plants is very low, and the content varies greatly among different organs, generally distributed as: root > stem > leaf > flower > fruit and seed. About 80% of the rare earth elements absorbed by plants are concentrated in the roots. Applying rare earth micro-fertilizer to walnut trees can promote the root system's absorption of nitrogen, phosphorus, potassium and
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A Detailed Explanation of Integrated Pest and Disease Management Strategies for Walnut Trees
There are many different methods for controlling walnut tree pests and diseases. In practice, the principle of "prevention first, integrated management" should be followed, with agricultural control as the foundation, rational use of pesticides, and integrated management measures combining biological control, physical control and chemical control, so as to
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What Are the Symptoms of Walnut Anthracnose? A Detailed Guide to Prevention and Control Methods
1. Distribution and occurrence characteristics Walnut anthracnose generally occurs mostly from June to August, with slight variations from place to place. In Jiangsu, Henan and Shandong it occurs from late June to early July, and in Hebei and Liaoning in August. The pathogen overwinters as mycelium and conidia in diseased fruits, diseased leaves or bud scales, and the following
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Symptom Identification and Control Methods of Walnut Bacterial Blight
1. Distribution and Occurrence Characteristics Widely distributed in walnut-producing areas such as Hebei, Shandong, Shanxi, Liaoning, Henan, Jiangsu, Zhejiang, Sichuan, Yunnan, Shanxi, and Gansu, with severe incidence in some areas. Infection generally begins in mid-to-late May. The pathogenic bacteria overwinter in the lesions of diseased branch tips or in diseased buds. In the spring of the following year, the bacteria spread by wind and rain splashing onto leaves, fruits, and young branches, causing damage. The pathogen can infect floral organs, so pollen can also carry the bacteria, and insects are also vectors. The bacteria invade through stomata, lenticels, nectaries, and various wounds. Under conditions of sufficient humidity, temperatures within the range of 4-30°C can cause infection of leaves, and 5-27°C can cause infection of fruits. The incubation period varies in different parts: 5-34 days on fruits and 8-18 days on leaves.
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Symptom Identification and Control Methods of Walnut Rot Disease
1. Distribution and occurrence characteristics. Also known as black water disease, it occurs in Henan, Shanxi, Shandong, Sichuan and other places. The pathogen overwinters in the diseased parts as mycelium or stroma and pycnidia. After the sap of the walnut tree begins to flow the following spring, when suitable conditions for disease development occur, conidia are produced,
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A Detailed Guide to the Correct Methods of Walnut Grading and Packaging
1. Nut grading standards and packaging. Sun-dried walnuts must be graded, because the quality of walnut nuts is of great concern to producers, traders, consumers and foreign trade departments, so nuts of different quality fetch different prices. Walnut nuts
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A Detailed Guide to Walnut Drying and Dehydration Methods
1. Natural Sun-Drying and Dehydration After the walnut nuts are cleaned, they must not be exposed to direct sunlight, to avoid the shells splitting and the kernels spoiling. The washed nuts should first be dried in the shade on bamboo mats or sorghum stalk mats for half a day, and once most of the moisture has evaporated, they can be spread out on reed mats or bamboo mats to dry in the sun. Spread
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