Fruit trees need a certain amount of water, and too much or too little is not good. We know that soil is a complex of water, fertilizer, gas, and heat. Good soils and soils have a proper proportion of each element. If there is too much water, it will inevitably affect the other three aspects, too much water, and soil. Breathability will deteriorate, the roots of fruit trees will feel breathless, and in severe cases will cause root deaths; soil temperature is difficult to increase when there is too much water, lower temperatures are not conducive to the growth of fruit trees, in addition, some mobility is strong The nutrients will also be lost or infiltrated into the deep soil with water. Therefore, fruit trees don't need much water. Generally speaking, the soil moisture content of 45-60% of the maximum field capacity can meet the demand of fruit trees. For some Wangshu trees, it is sometimes necessary to moderately control moisture in production so as to facilitate flowering of fruit trees.

In this regard, Professor Wei Qinping, a famous expert on fruit trees in China, has done such an interesting experiment by planting an apple tree in the middle of four square flowerpots, that is, dividing the roots of fruit trees into four parts for watering. The results showed that only one fruit tree (one-fourth watered) was poured at a time, the fruit tree had less vegetative growth and was easily flowered, and each time four flowerpots were watered fruit trees (ie, four molecules four Watering), a large amount of growth, lush foliage, but it is difficult to flower. This experiment shows that moderately controlled watering of fruit trees can achieve ideal results.

Large-water irrigation can easily cause the roots of fruit trees to absorb roots. We know that the topsoil of fruit trees with a root area of ​​more than 30 cm has a large amount of roots. What is the absorption root? It is the roots of white hairy roots with a length of only a few millimeters that absorb the roots. The most insignificant little thing is the lifeblood of fruit trees. These root systems are very sensitive to changes in the environment. Temperature changes in the surface soil, droughts, and floods all cause root deaths. Studies have shown that after large-water irrigation, the absorption of roots in the surface layer of the soil tends to cause a large number of deaths due to great changes in the aeration, temperature, and moisture content of the surface soil. The death of these roots will cause a temporary deficit in the nutrients of the fruit trees until the new roots are absorbed. Therefore, after some fruit trees have been irrigated with water, yellowing or fruiting of the leaves will occur.

Large-water irrigation will destroy the structure of soil aggregates, resulting in strong effects of soil compaction and irrigation on soil erosion and compaction. Large-water irrigation causes the air in the soil to be squeezed out, the soil is in an anoxic environment, and some roots and soil microorganisms Because of the death of hypoxia, the granule structure of the soil is also destroyed, resulting in soil compaction.

Large-water irrigation will cause the ground temperature to rise slowly, affecting the growth of roots and delaying the ripening of apples, especially in the spring. Since the specific heat of water is large, the ground temperature rises slowly after irrigation in the orchards. Low temperature will directly affect the growth of fruit tree roots and the activities of soil microbes, delay the flowering time of fruit trees, and then postpone the ripening time of apples, especially for medium-early-maturing apples.

Large-water irrigation is prone to spreading rot and other diseases such as rot. Many pathogens spread with water. After irrigating the orchard with water, various bacteria such as rot bacteria can cause water to flow to the root of each fruit tree. Healthy fruit trees, causing the spread of rot disease.

Large-water irrigation can easily cause fruit trees to prosper, and it is difficult to irrigate flowers and water after irrigation. Because excessive water is absorbed by fruit trees, the growth of nutrients is greatly enhanced, a large number of strips are produced, and new shoots are prosperous. The prosperous growth of new shoots will consume too much photosynthetic nutrition and mineral nutrients. The nutrients allocated to fruits, roots, and flower buds will be relatively reduced, the fruits will be difficult to grow, the flower buds will be difficult to form, the growth of roots will be inhibited, and the new shoots will be excessively prosperous. Long, the accumulation of nutrients deteriorates, the branches are not full, the resistance is reduced, the light is deteriorated, the ineffective foliage is increased, the utilization rate of light energy is reduced, and various diseases and insect pests are easy to prevail.

Water and nutrient waste caused by flood irrigation According to surveys, large-area irrigation requires more than 120 tons of water per mu of land, and the use of water-saving irrigation technology can save more than 75% of water. It is particularly important to promote water-saving irrigation and oppose large-water irrigation. For farmers, it can also save a lot of expenses. In addition, some of the mineral nutrients in the soil will be lost in the deep soil where the large water is lost or infiltrated (fruit trees cannot be used), resulting in great waste of nutrients.

Through the above analysis, we can see that flood irrigation is a “helpless” measure. Therefore, we must not conduct flood irrigation in actual production. We can use scientific instruments - soil moisture measuring instrument to know in advance the lack of water in the growth of fruit trees, and then take reasonable irrigation measures.

Wheel Brushes are a common power brush configuration and are further categorized as crimped wire or knot compositions. Crimped wires produce a fine finish and are composed of steel (carbon and stainless) and brass variants. They are fabricated in different wire sizes and diameter widths and are commonly employed for blending, cleaning and polishing purposes. According to experts they can be used as individual tools or together as a unit to create a wider brush area surface. Knot wheels are comprised of metal filaments that are confirmed, or twisted together to create a strong, abrasive action when they are operated by a power tool. These wheels are commonly used in heavy, abrasive removal applications, such as to remove scale and weld. They can be joined in multiples, or stacked to achieve greater width and coverage. Wheel brushes vary in size and application use, (e.g., single handed grinders and larger vacuum applications).

Twisted Knot Bevel Brushes

Twisted Knot Bevel Brushes, Twisted Knot Wire Bevel Brushes

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