First, the regional nature of improved varieties. The improved varieties are formed under certain ecological conditions and require a specific ecological environment during the planting process. When introducing improved varieties, it is necessary to consider whether the ecological conditions of the two areas are similar or similar, because differences in planting systems, fertility, and soil quality will cause differences in the production of improved varieties. Second, the timeliness of improved varieties. The improved varieties generally have timeliness in production and utilization, so they should be used according to market demand, combined with local cultivation conditions and cultivation methods. Third, the varieties of improved species characteristics. Varieties are distinguished from common varieties because they have very typical varieties, such as yield, quality, appearance, plant height, resistance, adaptability, etc. Therefore, good varieties should be prevented from mixing with common varieties from the beginning. To maintain its excellent variety characteristics. Fourth, improved varieties and good law support. The cultivation of improved varieties must be matched with their cultivation methods, and the results of different cultivation methods may vary greatly. The cultivation methods of improved varieties can refer to the instructions on the packaging bags, or obtained from the producers, distributors and related agricultural departments. Fifth, refinement and rejuvenation of improved varieties. In the production process, in order to prevent deterioration of good varieties and extend the useful life, measures such as purifying and rejuvenating, removing impurities, etc., may be taken to consolidate the characteristics of the varieties.
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