1. Improve soil organic matter content Soil organic matter can promote the formation of soil aggregates, increase soil permeability, improve soil fertility and water retention capacity and buffer performance. Measures to increase the orchard's organic matter include orchards covering grass, planting green manure, deciduous fruit trees, and applying organic fertilizers. 2. Balanced fertilization There is a synergistic effect and antagonism between the nutrient elements, and a certain proportion must be maintained during fertilization. In the absence of necessary mineral nutrients in the soil, the apple tree can not grow normally; when it is too much, it is not conducive to the growth and development of the apple tree. When there are too many trace elements, the apple tree will be poisoned. 3 timely fertilizer, a small number of times There are three peaks in apple tree growth within one year: the first time from early April to early May; the second time is mostly from early June to mid-July; the third time is after mid-September and the duration is longer. Long, can be extended to mid-late November. The top-dressing period should be carried out at these three growth peaks. 4. Scientific fertilization In the application of fertilizers, organic fertilizers and soils are backfilled and, where appropriate, soluble fertilizers can be applied through drip irrigation systems in orchards. Urea, borax, zinc sulphate, calcium amino acid, etc. can all be used for foliar spraying. The foliar spraying time is best performed before 9 o'clock and after 6:00 o'clock on cloudy or sunny days. 5. Appropriate amount of water Fertilizers can only be absorbed by the roots of apple trees if they are dissolved in water, but excessive amounts of water in the soil will not only make the roots anaerobic, but will also leaching fertilizer. After fertilization, it should be irrigated according to the soil moisture content. 6. Do not superstition fruit special fertilizer The special fertilizer for fruit trees is not a common fertilizer for all kinds of fruit trees, nor is it suitable for all regions. It is only suitable for fertilizers of a certain age in a certain tree species in a region. Welding mask is a type of headgear used when performing certain types of welding to protect the eyes, faceandneck from flash burn, ultraviolet light, sparks, infrared light, and heat. Welding Mask,Welding Face Shield,Pp Welding Mask,Flip Type Welding Mask Greateagle Safety Products Co., Ltd. , https://www.greateaglesafety.com
welding
masks are most commonly used with arc welding processes such as
shielded metal arc welding, gas tungsten arc welding, and gas metal arc
welding. They are necessary to prevent arc eye, a painful condition
where the cornea is inflamed. welding masks can also prevent retina
burns, which can lead to a loss of vision. Both conditions are caused by
unprotected exposure to the highly concentrated ultraviolet and
infrared rays emitted by the welding arc. Ultraviolet emissions from the
welding arc can also damage uncovered skin, causing a sunburn-like
condition in a relatively short period of welding.