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Analysis on the Production Advantages of USA Pima Extra Long Staple Cotton
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作者 田立文 徐志武 +7 位作者 郑子漂 宁新民 崔建平 朱斌 徐海江 郭仁松 林涛 刘志清 《Agricultural Science & Technology》 CAS 2017年第5期892-903,共12页
This paper defines the following advantages of ELS (Extra Long Staple) also known as Pima cotton planted in the United States: first, the only variety which is concentrated in the planting area with good soil moist... This paper defines the following advantages of ELS (Extra Long Staple) also known as Pima cotton planted in the United States: first, the only variety which is concentrated in the planting area with good soil moisture and fertilizer retention performances and abundant light and heat resources; second; advanced and practi- cal material equipment and technology; third; high yield and good quality, significant planting scale benefit; fourth, feasible and reliable modernized intensive farm man- agement mode with large-scale agricultural machinery operation; fifth, high-efficient social services and policy support system, as well as reasonable planting layout, good brand influence, synchronization of high yield and good quality with large-scale benefits. Although the production capability of Pima cotton in the United States is considered to be the largest and most powerful country in the world, compared with the ELS production in China, both have their own advantages and characteristics. Therefore, it is suggested that by using the ELS production experience ol the Unit- ed Stages for reference, China should make use of the modern breeding technJques to accelerate the modification of synthetic genetic features of ELS variety, try its best to breed the ELS variety which is suitable for mechanical plucking as soon as possible, actively develop new technology to simplify the whole cost saving cultiva- tion, reform ELS production organization, vigorously develop the social service sys- tem, and adjust and optimize the ELS industry support policies, so as to fundamen- tally improve the competitiveness of China's ELS in international market. 展开更多
关键词 ELS (Extra Long Staple) or Pima cotton Natural Ecology Planting lay-out and scale Fiber quality Material equipment
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THE MAXIMUM NUMBER OF INTERSECTIONS BETWEEN TWO PLANE RECTANGULAR PATHS
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作者 LI QIAO, XU JUNMING, AND ZHANG ZHONGLIANG 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1995年第2期215-222,共8页
We show that the maximum number of intersections between two plane rectangular paths with lengths m and(mod 3); and it is mn+1 otherwise.
关键词 lay-out on printed circuit board rectangular paths intersections.
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