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utilization and improvement of purplish soil
释义
utilization and improvement of purplish soil
Encyclopedia
农学
紫色土利用改良
释
utilization and improvement of purplish soil
紫色土利用改良
为改善紫色土性状,提高紫色土肥力,充分发挥紫色土的生产潜力而采取的综合农业技术措施。其主要运用土壤学、农业工程、生态学等多种学科的理论与技术,排除或防治影响农作物生育和引起土壤退化等不利因素,最终达到为农作物创造良好土壤环境条件的目的。
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memorials sent to a local authority
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Memorials Submitted to the Throne by Officials for the South Song Dynasty,block-printed edition,Chunyou era,Song Dynasty
Memorials Submitted to the Throne in the Song Dynasty
Memorials to the Throne during the Tiancong Era of Qing
memorials to the throne of Lu Zhi
Memorials to the Throne Written by Government Officials of the Ming Dynasty
Memorials to the Throne Written by Government Officials of the Song Dynasty
Memorials to the Throne Written by Lu Zhi
Memorials to the Throne Written by Renowned Government Officials through History
memorial submitted to a superior
Memorial Submitted to Prince Jianping
memorials with no cover
Memorial Table of Emperor of Qinghe Prefecture in the Tang Dynasty
memorial tablet
Memorial Temple to Cang Jie
memorial to emperor
Memorial Tomb and Temple of Sima Qian
memorial to the emperor for congratulations
Memorial to the Murdered Jews of Europe
memorial to the throne
memorial to the throne(accordion form)
Memorial to the Throne Concerning Archives Rearrangement
memorial to the throne for discussing state affairs
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