Results 31 to 40 of about 281,792 (338)

Boron deficiency responses in maize (Zea mays L.) roots

open access: yesJournal of Plant Nutrition and Soil Science, EarlyView., 2023
Abstract Background Boron (B) is an essential micronutrient for plants. Dicot plants respond to insufficient B supply by altering root architecture and root hair growth. How root systems of rather low‐B demanding monocot species such as maize (Zea mays L.) respond to B deficiency in terra has not been experimentally resolved, yet.
Manuela Désirée Bienert   +5 more
wiley   +1 more source

Measuring method for membrane penetration capacity of coarse-grained soil in triaxial tests

open access: yesYantu gongcheng xuebao, 2021
The membrane penetration effects displayed in the coarse-grained soil tests will distort the measurement of volume deformation of samples, thereby affecting the measuring accuracy of strength and deformation index.
XU Wei-wei 1, CHEN Sheng-shui 1, 2, FU Zhong-zhi 1, 2, JI En-yue 1, 2
doaj   +1 more source

A Constitutive Model Incorporating Mixed Soil Slurry for Interface [PDF]

open access: yesE3S Web of Conferences, 2021
In projects, mixed soil slurry between cut-off wall and coarse-grained soil always exists. It may influence on or change mechanical properties of interface between coarse-grained soil and structure.
Peng Kai   +6 more
doaj   +1 more source

Geo-environmental mapping using physiographic analysis: constraints on the evaluation of land instability and groundwater pollution hazards in the Metropolitan District of Campinas, Brazil [PDF]

open access: yes, 2010
Geo-environmental terrain assessments and territorial zoning are useful tools for the formulation and implementation of environmental management instruments (including policy-making, planning, and enforcement of statutory regulations).
A Cendrero   +39 more
core   +1 more source

Empirical formula for permeability coefficient of coarse grained soil based on gradation equation and its verification

open access: yesYantu gongcheng xuebao, 2020
The coarse-grained soil is widely used in earth-rock dams and road projects. Its seepage characteristics are related to the stability and safety of the projects.
BAO Meng-die 1, 2, ZHU Jun-gao 1, 2, WU Er-lu 1, 2, WANG Long 1, 2, CHEN Ge 1, 2
doaj   +1 more source

Macro-Micromechanical Properties of Sandy Pebble Soil of Different Coarse-Grained Content

open access: yesEarth Sciences Research Journal, 2018
Sandy pebble stratum is a typical discrete particle unstable stratum, mainly consisting of sand and pebble. However, the effect of coarse-grained content on the stability of stratum is not clear.
Junfu Lu   +3 more
doaj   +1 more source

Evolución geológica en la cuenca baja del río Colorado durante el cenozoico, Patagonia Norte, Argentina [PDF]

open access: yes, 2019
Climatic changes and eustatic sea levels have been assumed to be the most important controllers of the Colorado River alluvial fan in northern Patagonia.
Perillo, Gerardo Miguel E.   +2 more
core   +2 more sources

Lake sedimentological and ecological response to hyperthermals : Boltysh impact crater, Ukraine [PDF]

open access: yes, 2017
Acknowledgements Initial drilling of the Boltysh meteorite crater was funded by Natural Environment Research Council (NERC) grant NE/D005043/1. The authors are extremely grateful to the valuable scientific contributions of S. Kelley and I. Gilmour.
Andrews, Steven D.   +3 more
core   +1 more source

Shear Properties and Mechanism of Freeze-Thaw Interface in Unsaturated Coarse-Grained Soil from Qinghai-Tibet Plateau

open access: yes, 2021
Freeze-thaw interface in unsaturated coarse-grained soil (CGS) is a weak plane which can cause slope failures in cold regions. This study presents a series of large-scale direct shear tests on freeze-thaw interface in CGS through a temperature control ...
Yong-long Qu   +5 more
semanticscholar   +1 more source

Rate-dependent experimental study on unsaturated coarse-grained soil controlled by matrix suction

open access: yesYantu gongcheng xuebao, 2023
To study the time-dependent deformation characteristics of high-fill subgrade in mountainous areas, the water-retention characteristics of coarse filler and a series of rate-dependent mechanical properties tests under constant suction are carried out for
YIN Fengjie 1, 2, CAI Guoqing 1, 2, SU Yanlin 1, 2, SHAN Yepeng 1, 2, LI Jian 1, 2
doaj   +1 more source

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