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粮食生产受到多种主客观条件的制约,水、肥料、土壤、种子对粮食都有极大的影响,其中种子的优劣更是一个关键因素。多年来,科学家从事良种研究的传统
Food production is subject to a variety of subjective and objective conditions. Water, fertilizers, soils and seeds have a great impact on grain production. The quality of seeds is even more a key factor. Over the years, scientists have engaged in the study of improved varieties