Achievements and gaps in tef productivity improvement practices in the marginal areas of Northern Ethiopia: implications for future research directions

Tef is the most important crop in Ethiopia and is well-adapted to growing environments, but grain yields are low. The government is therefore promoting the adoption of improved varieties, inorganic fertilizers and new planting techniques. This study gathered information on the use of new agronomic practices and barriers to their adoption through a semi-structured questionnaire administered to 60 farmers or respondents from each of 4 districts of Tigray region in northern Ethiopia viz Laelay-Maichew, Medebay-Zana, Ahferom and Alamata. Data were coded and analysed using SPSS software. Except for animal feed and crop rotation, there were significant differences between districts in the relative importance of several criteria for different uses. Improved varieties were used by the majority of respondents in all districts and fertilizers in all except Alamata where severe moisture stress dictated the choice of variety and reduced fertilizer application. Weed control was mainly by hand except in Alamata where chemical control was common because of the predominance of broad-leaved weeds. Transplanting maximized the yield of tef, but a cost–benefit analysis showed that row sowing was more profitable. The study concluded that new varieties better adapted to the likelihood of reduced rainfall and that respond efficiently to fertilizer inputs need to be developed. Until suitable technologies are available, high labour costs would in part dictate some agronomic practices, even if this led to lower yields.     

论预约定价的民法适用

预约定价作为税法开拓的新领域,尽管起步较晚,但发展却异常迅速。与预约定价实践迅速发展形成鲜明对比的是预约定价的理论研究却异常缓慢,在中国如此,在世界亦如此。通过对预约定价的概念进行界定,建议运用法学多学科的视角对预约定价进行理论分析,并大胆把民法、行政法和公共管理的相关理论援引到预约定价中,来分析预约定价的民法适用问题。     

OECD税制绿色化与我国之借鉴

OECD成员国在实现税制绿色化方面采取的值得我国借鉴的措施有:取消或修正现行扭曲性的补贴和税收条款,调整现行税制,开征新的环境税.基于对我国现实国情的考虑,将实现税制绿色化的重点放在开征新的环境税-环境污染税和某些资源税上,并以改革现行税制与逐步消除对环境不利的补贴政策辅助之.     

水稻工厂育苗机械插秧技术经济分析

推广水稻工厂化育苗与机械化插秧技术是否可行进行了分析,提出了在应用该项技术过程中应注意的问题,解决问题的方法,对推广该技术增加收入、节省成本的效果进行了量化分析。     

台风“山竹”对广州火炉山森林公园树木 的影响

通过调查火炉山森林公园521棵6a移栽龄和633棵 10a移栽龄树木在“山竹”台风中的受损情况，分析了移栽 龄、径级和树高对各树种抗风能力的影响。结果表明：1)移栽 龄的增加显著降低了树木的受损率；2)在6a移栽龄群落中， 立木的总受损率随着径级的增加而增加；在10a移栽龄群落 中，立木的总受损率随径级的增加而降低，说明根系的稳定有 利于提高树木的抗风性；3)6a和10a移栽龄树木受损率均随着 树高的增加而增加，这意味着树高不利于树木的抗风性；4)在 不抗风树种中，各径级和树高树木的损伤率无显著性差异     

东北地区景观树移植的技术要点

移植成活、树木生长势良好和达到最佳景现效果是景观树移栽的目的；阐述东北地区景现树移植应注意的主要技术要点：景观树的选择、土坨的确定、移植过程中及移植后养护管理。等；强调了土坨保温、根系的杀菌、密封处理、促进根系生长、快速营养复壮以及养护管理过程中采取的各项技术措施。     

恩施地区大树移植和养护技术

结合恩施地区大树移植的实践经验,探讨大树移植以及养护的具体技术措施。     

解读苏珊·巴斯内特的“种子移植”理论

诗是一种独特的语言,具有独特的形式和内涵。翻译涉及将原诗的形式与内涵用另一种语言忠实地再现出来,翻译时很难兼顾。苏珊.巴斯内特的"种子移植"理论,对诗歌翻译有着一定的指导意义。