Results 21 to 30 of about 7,711 (265)

Correlation Research of TBM Tunnel Rock Mechanical Characteristics, Chiseling Specific Energy, and Abrasion Performance: Case Study of Jiaozhou Bay Subsea Tunnel in Qingdao

open access: yesGeofluids, 2020
This paper takes Qingdao Jiaozhou Bay subsea tunnel project as the research object to study the relationship among rock mechanical parameters and chiseling specific energy and abrasion performance.
Yawei Wang, You Zhang, Guang Wu
doaj   +1 more source

Soil penetration resistance in a rhodic eutrudox affected by machinery traffic and soil water content. [PDF]

open access: yes, 2013
: Soil compaction caused by machinery traffic reduces crop yields. This study aimed to evaluate the effects of intensive traffic, and the soil water content, on the soil penetration resistance (PR) of a Rhodic Eutrudox (Distroferric Red Latosol ...
DEBIASI, H.   +3 more
core   +2 more sources

Non-traditional energy-saving methods for treating soils of a heavy mechanical composition in the crop rotation link

open access: yesНовые технологии, 2020
The results of multi-year research on the study of unconventional methods of tillage on fused leached chernozems of the south-foothill zone of Adygea are presented.
О. A. Blagopoluchnaya, N. I. Devterova
doaj   +1 more source

Soil tillage systems: changes in soil structure and crop response

open access: yesRevista Brasileira de Ciência do Solo, 2011
The introduction and intensification of no-tillage systems in Brazilian agriculture in recent decades have created a new scenario, increasing concerns about soil physical properties.
Michael Mazurana   +3 more
doaj   +1 more source

Smooth polytopes with negative Ehrhart coefficients

open access: yes, 2018
We present examples of smooth lattice polytopes in dimensions 3 and higher where each coefficient of their Ehrhart polynomials that can potentially be negative is indeed negative. This answers a question by Bruns.
Brown, André EX (5398142)   +11 more
core   +2 more sources

Chiseling and gypsum application affecting soil physical attributes, root growth and soybean yield

open access: yesRevista Ciência Agronômica, 2019
This study aimed to evaluate the effect of chiseling and gypsum application on soil physical properties, soybean root growth and grain yield. An experiment was carried out in Londrina, Paraná state, Brazil, under a randomized complete block design, with ...
Esmael Lopes dos Santos   +4 more
doaj   +1 more source

Physical and chemical changes in soil fertilized with poultry manure with and without chiseling

open access: yesRevista Brasileira de Engenharia Agrícola e Ambiental, 2016
Poultry manure and mechanical management may influence the distribution of nutrients in the soil profile. The objective was to evaluate physical and chemical changes in a soil with palisade grass ( Brachiaria brizantha cv.
Edson S. Eguchi   +5 more
doaj   +1 more source

Prototype for soil mechanical resistance measurement with chisel plow automated control [PDF]

open access: yesEngenharia Agrícola, 2016
In Brazil, there are several available models and systems to measure soil compaction; however, the data generated by such equipment have to be processed and interpreted, making the process expensive.
THIAGO M. MACHADO, KLÉBER P. LANÇAS
doaj   +2 more sources

Corn in postcut crops

open access: yesНовые технологии, 2023
In agrotechnologies postcut crops of intermediate cultures are placed after harvesting annual grasses for green mass, and stubble crops after harvesting early grain crops. Annual herbs at the April sowing dates reach mowing maturity and are harvested for
A. Y. Kishev   +3 more
doaj   +1 more source

Shrinkage Mitigation and Mechanical Properties of Cement‐Based Mortar With Silane‐Functionalized Hydrogels

open access: yesJournal of Applied Polymer Science, EarlyView.
Schematic depiction of silane‐functionalized hydrogels utilized in this study along with chemical structures of the primary comonents (Acrylamide, N,N'‐methylenebisacrylamide, and 3‐(trimethoxysilyl) propyl methacrylate). ABSTRACT This study investigates the applications of silane‐loaded polymer hydrogels in field‐relevant cement‐based mortar intended ...
Daniel S. Hiller   +3 more
wiley   +1 more source

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