The effectiveness of implementing eco initiatives to recycle water and food waste in selected Cape Town hotels

This article presents an account of the effectiveness of implementing eco initiatives to recycle water and food waste in selected Cape Town hotels as well as whether these initiatives would be a successful future endeavour to pursue. It suggests corporate travel policies demand travellers to seek out environmentally friendly hotels. The research strategy gathers facts relevant to the theory of the article. Therefore, it employs a multi-strategy research approach as it was effective to corroborate the findings from both quantitative and qualitative data. Case studies, questionnaires and interviews were utilised and the article shows that earthworm farms convert organic food waste into usable compost and reduces the production of waste. Rainwater harvesting further stores captured rainwater for future use and serves as an alternative source of surface water. The findings show a positive response from hotel staff towards implementing these initiatives which suggests it would be a successful future endeavour.     

Optimal weed control under static and dynamic decision rules

Dynamic and static weed control decision rules are derived analytically and compared. The dynamic rule leads to increased farm profits and greater control of weeds and weed seeds than the static rule, while total herbicide use is unchanged. The magnitude of the differences is estimated for atrazine control of foxtail and cocklebur in corn production. Incorporating weed dynamics into weed control strategies increases farm profits between 1.0 and 1.4%.     

Harvest and extinction in multi-species ecosystems

A potential cost of harvesting in multi-species ecosystems is the extinction of nonharvested species that are at the same trophic level as the harvested species. Existing analytical models are not well-suited for studying this harvest externality because they focus on species interactions across trophic levels instead of within them. We identify the conditions under which the harvesting of a single species causes at least one extinction of nonharvested species at the same trophic level. We compare two harvest regimes: uniform management, in which a privately optimal harvest rate is applied to the entire ecosystem; and specialized management, in which a portion of the ecosystem is intensively managed for the harvested species and the rest is left unharvested. Which regime is more likely to result in extinction depends on the discount rate and on the harvested species' competitive ability and colonization rate compared to those of the other species.     

不同浸种配方防治水稻种传病害药效试验小结

通过对07-6和07-8两种杀菌剂在苗床上的试验,结果表明两种杀菌剂均可防治水稻立枯病和恶苗病。     

水稻酿热物育壮秧高产栽培技术操作规程

以黑龙江省为代表的寒地稻作带,早春气温低且不稳定,水稻育苗时间拖后,壮秧效果差。通过苗床底部添加酿热物后可以明显提高棚温,苗床10cm内温度可提高3.3℃,进而实现提早育苗,培育壮秧。     

林木良种生产与公共产品提供的理论分析

文章从公共管理视角,运用传统的公共产品需求和供给理论阐述了林木良种生产的公益性特征,解释了林木良种的公共产品属性。指出,需求主体对林木良种的选择愿意低,不发达的林业产业对林木良种的需求弹性低,公益性林木良种使用激励不足等,是供需调节市场失灵的主要原因。     

大兴安岭天然樟子松林种子植物区系研究

根据野外调查,统计出大兴安岭天然樟子松林含种子植物42科119属239种;对大兴安岭天然樟子松林的种子植物区系分析表明:该植物区系属于温带性质的,且较年轻,但有许多种的分布中心偏北,突出表现了寒温带森林的特点。     

基层集体林采伐管理存在的弊端与对策

通过分析当前基层集体林采伐管理中存在的林木采伐指标下达迟,伐区调查设计不规范,伐区采伐作业存在违法行为,加工企业非法收购木材,林业执法存在随意性的弊端,提出集体林权制度改革后,新形势下必须加强队伍建设,减少审批环节,加强伐区源头管理,严厉打击违法行为,林权档案实行动态管理的建议。     

论“合同制,以增产定补贴”的良种推广应用新模式

本文分析了良种推广应用补贴的意义,以及目前"以面积定补贴"的弊端,提出了"走合同制,以增产定补贴"的良种推广应用补贴新模式,论述了改模式能更大程度的激发良种推广应用补贴对粮食生产的作用,并且制定了补贴的原则。