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Read and translate the text with the help of a dictionary. Soils and climate Grapes are adapted to a wide variety of soil conditions, from high pH and slightly saline. Growing grapes is one of the oldest cultural practices⇐ ПредыдущаяСтр 14 из 14
Soils and climate Grapes are adapted to a wide variety of soil conditions, from high pH and slightly saline, to acidic and clayey. Deep, well-drained, light textured soils are best for wine grapes. Highly fertile soils are unsuited to high quality wine production, since vigor and yield must be controlled. Irrigation can be detrimental to grape internal quality, and is sometimes illegal for wine grapes, but is beneficial for table and raisin grapes where high yields are desired. Even though grapes have a relatively deep root system, it is desirable to minimize the competition between grapes and any cover crop that might be grown between the rows. This means that it is desirable to cultivate them frequently enough during the early part of the growing season to stimulate good growth and to insure good production. Some grape roots are close to the surface and cultivation should therefore be shallow. Soil management should include some form of winter cover crop to help maintain organic matter and soil texture. Manures are also highly desirable if available. With grapes emphasis should be on organic matter conservation since the vines occupy the land for a long period of time and high organic matter content in the soil favors better plant growth. Harvest Method Table grapes. Individual clusters are judged for maturity by pickers, and clipped from vines with minimal handling, and placed in plastic lugs. Raisin, wine and Concord juice grapes. Mechanical harvest is the norm for all processed grapes, except many wine grapes. Wine grape clusters are clipped by hand, and special wines are made from hand-picked berries from particular areas of a cluster. Mechanical harvesters generally have horizontally pivoting arms which smack the canopy, or vibrating fingers which dislodge clusters and berries from. Raisin grapes are often harvested 4-8 days after pruning canes, which causes berries to abscise more easily from clusters. Canes are pruned but left in place, and harvested mechanically when berries are loose. This allows a neat, single layer of de-stemmed berries for harvest onto continuous paper trays. 1.5 Say if these statements are false or true: 1. Grapes are propagated by runners. 2. Grapes need a supporting structure for vines. 3. Most grape varieties have a shallow root system. 4. Mechanical harvest is the norm for wine grapes.
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