Results 11 to 20 of about 3,405 (163)
Journal of Ecology, Volume 111, Issue 12, Page 2733-2749, December 2023., 2023 Our results indicate that defoliation and fertilisation, two common grassland perturbations, have contrasting impacts on root traits of grassland plant species, with direct and indirect short‐term consequences for a wide range of soil abiotic and biotic properties that underpin ecosystem functioning.
Yan Liu +2 more
wiley +1 more source
Disasters, Volume 47, Issue 2, Page 437-463, April 2023., 2023 Efforts to reduce the gap between the research evidence base and humanitarian responses have focused on producing quality evidence and ensuring its use in decision‐making. Yet, how evidence translates into field‐level implementation is not well understood in humanitarian contexts.
Enrica Leresche +7 more
wiley +1 more source
Risk, Hazards &Crisis in Public Policy, Volume 13, Issue 4, Page 356-378, December 2022., 2022 Abstract Stakeholder consultation and participation are often viewed as an essential component of hazards governance and disaster risk reduction. However, an extensive literature in the fields of hazards management, disaster risk reduction, planning, and environmental governance has highlighted numerous challenges that have constrained attempts to ...
James M. Jeffers
wiley +1 more source
European Policy Analysis, Volume 7, Issue S2, Page 344-364, Summer 2021., 2021 Abstract One of the European Union (EU) institutions’ responses to the alleged “democratic deficit” in the EU is the introduction of the European Citizens’ Initiative (ECI). The ECI provides an agenda‐setting tool accessible to different advocacy groups.
Jale Tosun, Simon Schaub
wiley +1 more source
Policy Change Through Negotiated Agreements: The Case of Greening Swiss Agricultural Policy
Policy Studies Journal, Volume 49, Issue 3, Page 731-756, August 2021., 2021 Negotiated agreements are a promising pathway for policy change. This paper revisits and extends characteristics of negotiated agreements using the Advocacy Coalition Framework. We focus on two characteristics of negotiated agreements that previous literature has not explicitly addressed.
Florence Metz +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2023 以福建省福鼎市白琳镇(BL)、点头镇(DT)、磻溪镇(PX)、管阳镇(GY)和太姥山镇(TMS)的茶园土壤为研究对象,研究其团聚体组成及稳定性,各粒级团聚体有机碳含量、固碳贡献率及有机碳红外光谱,旨在从团聚体尺度揭示茶园土壤有机碳分布及其分子结构特征。结果表明:(1)不同采样地土壤团聚体组成存在差别,但随土层加深,大团聚体(0.25~2 mm)和微团聚体(0.053~0.25 mm)含量均减少,而粉-黏粒团聚体(＜0.053 mm)含量增大;(2)随土层加深,所有采样地平均重量直径(MWD ...
葛茂泉 +8 more
doaj
Influence Mechanism of Ionic Interface Reaction on Soil Porosity [PDF]
, 2023 [Objective] The changes in surface charge properties of soil particles and the net force between particles were analyzed, in order to elucidate the influence mechanism of particle interaction on pore conditions.
Ding Wuquan +3 more
core +1 more source
Erosive Rainfall Thresholds for Five Typical Soils in Water Erosion Region of China [PDF]
, 2022 [Objective] The practical thresholds separating erosive from non-erosive rainfall events were determined to effectively reduce the workload of soil erosion prediction, and to provide references for regional soil erosion prevention.
Liu Baoyuan +3 more
core +1 more source
Shuitu Baochi Xuebao, 2021 以贺兰山不同海拔植被下0—20，20—40 cm土层土壤为研究对象，分析不同粒径团聚体含量及团聚体稳定性随海拔升高的变化特征，探讨其与土壤理化性质之间的相关关系。结果表明：0—20 cm土层，0.25~0.053 mm团聚体为主要团聚体类型，随海拔增加，水稳性大团聚体（>0.25 mm）含量增加，高海拔>低海拔，较高含量的大团聚体和土壤养分是团聚体稳定的关键要素。
吴梦瑶 +6 more
doaj
Shuitu Baochi Xuebao, 2003 土壤团聚体是保持土壤水分和土壤透性的基本单元.本综述的目的是通过围绕团聚体理论的讨论,明确影响团聚体形成的因素,为农田维护提出可靠的理论依据.首先总结了团聚体形成的主要理论,即Emerson的粘团理论、Edwards和Bremner的微团聚体理论和Oades 及Waters的团聚体分级构建理论,然后讨论了土壤有机质、可溶性阳离子和氧化铁、铝3个影响团聚体形成的主要因素,最后分析了团聚体破坏的机理和评价团聚体稳定性的主要方法,指出保持土壤颗粒的凝聚状态、增加各种形态的土壤有机质是增加土壤团聚性的主要措施.
赵京考, 刘作新, 韩永俊
doaj +2 more sources