Results 21 to 30 of about 2,654 (121)
Trump, Personalism, and US Administrative Capacity
Politics &Policy, Volume 53, Issue 4, August 2025.ABSTRACT Donald Trump represents an extraordinary degree of personalism in American politics, especially given the traditional power and capacity of the Republican Party and American democracy. A lesson Trump drew from his first term in office is that he needed to better institutionalize mechanisms of personal loyalty to deal with perceived betrayals ...
Donald Moynihan
wiley +1 more source
Distribution Pattern of Cadmium in the Profile of Shallow Fissure Soil and Its Influencing Factors in Karst Areas with High Geological Background [PDF]
[Objective] To study the vertical distribution pattern of cadmium (Cd) in shallow karst fissure soil, analyze the impacts of various factors on the distribution of Cd in fissures, and provide a scientific basis for future research on the distribution ...
CAI Huayin +6 more
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Manifesting symbolic representation through collaborative policymaking
Policy Studies Journal, Volume 52, Issue 2, Page 283-318, May 2024.Abstract Collaboration is a widely employed strategy for addressing “wicked” policy problems. While scholars have long recognized that the organizational composition of collaborative forums can have a dramatic impact on the efficacy and equity of associated forum outputs, little is known about whether such composition impacts the manner in which ...
Jack Mewhirter +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2021 为研究植被恢复对水库消落带土壤团聚体组成及稳定性的影响，利用干筛和湿筛法，测定了大桥水库消落带不同水位高程下柳树林地土壤团聚体组成分布，并基于分形理论分析了土壤团聚体分形特征。结果表明：（1）消落带柳树林地土壤>0.25 mm非水稳定性团聚体和水稳性团聚体分别为73.13%~93.69%和47.62%~82.06%，较对照无植被样地土壤均有所增加，但两者差异不明显；消落带土壤大团聚体含量随水位高程升高而降低，随土层深度增加而减少，但在不同水位高程和不同土层间均无显著性差异（p>0.05）。（2 ...
宋娇 +4 more
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Effects of Different Vegetation Restoration Measures on the Disintegration Characteristics of Eroded Degraded Land of Pinus massoniana in Red Soil Region [PDF]
[Objective] To investigate the characteristics of soil disintegration under different vegetation restoration measures in degraded land of Pinus massoniana, compare the improvement of soil disintegration in severely degraded P.
LIN Qiang +8 more
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United in disagreement: Analyzing policy networks in EU policy making
Review of Policy Research, Volume 41, Issue 1, Page 59-82, January 2024.Abstract Shared belief systems are generally assumed to forge policy networks. Empirical evidence whether and to what extend shared policy core beliefs create ally networks and under which circumstances shared policy core beliefs are not necessary to form these networks, however, is limited.
Dennis Abel, Armin Mertens
wiley +1 more source
Shuitu Baochi Xuebao, 2016 为分析南水北调(中线)丹江口库区不同土地利用方式土壤团聚体稳定性及其分形特征，揭示人类活动对土壤结构的影响，以库区内不同土地利用方式（水田、旱地、果园、人工林地、自然林地）土壤为研究对象，经干筛和湿筛法测定团聚体组成，以土壤团聚体稳定性指标（大团聚体含量（R＞0.25）和团聚体破坏率（PAD））、土壤团聚体直径指标（平均质量直径（MWD）和几何均重直径（GMD））以及分形维数（D）作为评价指标，对比分析丹江口库区不同土地利用方式下土壤团聚体组成及其稳定性。结果表明，对土壤团聚体组成的测定 ...
姜, 刘, 刘
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Shuitu Baochi Xuebao, 2017 通过连续5年定位试验，以紫云英、秸秆和商品有机肥等有机物料还田的稻田土壤为研究对象，研究有机物料还田后不同物理分组下土壤组成特点和有机碳变化特征。结果表明，稻田土壤团聚体主要分布在2～0.25 mm与0.25～0.053 mm粒级，团聚体颗粒有机碳含量随着粒径的减小而减少。有机物料还田可提高0.25～0.053 mm和＜0.053 mm粒级团聚体有机碳的含量，紫云英、秸秆、商品有机肥等有机物料可通过提高土壤微团聚体有机碳含量而增加土壤碳库。有机物料施用增加土壤轻组组分颗粒含量，减少重组组分颗粒含量 ...
俞巧钢, 邹, 顾国平
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Shuitu Baochi Xuebao, 2011 以黑土为供试土壤,采用化学试剂模拟根系分泌物进行室内培养试验,研究低分子量根系分泌物及主要组分对土壤微生物活性及团聚体稳定性的影响。结果显示,与对照相比,低分子量根系分泌物及主要组分短期内均显著提高了土壤微生物的活性,促进了>250μm大团聚体,尤其是>2 000μm团聚体的形成,显著增强了土壤团聚体的稳定性。低分子量根系分泌物中葡萄糖组分有利于土壤中细菌的生长,从而在细菌活动的驱动下,促进了微团聚体的形成;苹果酸和谷氨酸组分则有利于真菌的生长和繁殖,在真菌菌丝网络的缠绕和粘结作用下 ...
苑亚茹 +3 more
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Shuitu Baochi Xuebao, 2021 为探究甘肃小陇山不同林分对土壤团聚体稳定性的影响，选取小陇山林区3种典型林分（油松林、日本落叶松林、锐齿栎林）为研究对象，用Le Bissonnais中的快速湿润（FW）处理方法测定其不同土层深度（0—10，10—20，20—40 cm）土壤团聚体平均质量直径（MWD），并进一步研究土壤基本理化性质（土壤机械组成、SOC、CEC、pH）和根系特征（细根与极细根比例、RLD、RMD、SRL）对土壤团聚体稳定性的影响。结果表明：不同林分下土壤团聚体稳定性表现为锐齿栎林>油松林>日本落叶松林 ...
崔芯蕊 +4 more
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