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Technical Key Points and Implementation Methods for the Improvement of Abandoned Jujube Orchards
1 Breaking the Hardpan, Deep Plowing, Clearing Weeds and Removing Suckers Deep plowing can clear weeds, remove excess root suckers, and increase the soil's permeability and capacity to retain water and dissolve fertilizers. It can also turn pest eggs and larvae up to the surface to be dried out by the sun or picked out and killed. Deep plowing should be carried out when the soil is suitable for cultivation; if too dry or too wet, clods easily form and the structure is destroyed. Deep plowing should also be adjusted in depth according to position: the area far from the canopy should be deeper, reaching about 20 cm; the area near the canopy should be shallower, about 10 cm. This avoids excessive root damage that would affect tree vigor. Deep plowing creates favorable conditions for root regrowth; because the jujube tree has well-developed horizontal roots with strong outward extension and regeneration capacity, damaging part of the root system will also stimulate the sprouting of more horizontal roots.
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