Results 71 to 80 of about 36,600 (198)

UK and EU policy for approval of pesticides suitable for organic systems: Implications for Wales [PDF]

open access: yes, 2004
This study was commissioned by the Welsh Assembly Government (WAG) to review the pesticide approval system in the UK and Europe as far as it affects the use of substances and techniques for crop protection by organic producers in Wales. WAG considers it
Bradshaw, N J   +4 more
core  

Microstructure and mechanical properties of GH3230 superalloy laser welding with filler wire

open access: yesHanjie xuebao
GH3230 superalloy has broad application prospects in the aviation field. The process, microstructure, and mechanical properties of laser welding with filler wire were investigated, and the weld formation, joint microstructure, room temperature tensile ...
Shijian PAN   +6 more
doaj   +1 more source

Effect of Parameters of HRS Process on Microstructure of DZ466 Ni-based Superalloy

open access: yesJournal of Aeronautical Materials, 2018
The influences of withdrawal rate and mold heater zone temperature during high rate solidification (HRS) on the microstructures were investigated. As the results, the primary dendritic spacing, the size of γ′ phase particles and carbides are decreased ...
JIANG Hua   +4 more
doaj   +1 more source

Management of Acid Soils [PDF]

open access: yes
Resource /Energy Economics and Policy,
Craswell, Eric T., Pushparajah, E.
core   +1 more source

Effect of liming on yield and quality of peppermint and Sachalin mint in fine sand soil of Northern Finland [PDF]

open access: yes, 2003
Soil acidity commonly limits plant production in the fine sand soil of Northern Finland, which often has a low pH (5.5-6.5) and contains low levels of Ca and Mg.
Aflatuni, Abbas   +3 more
core  

Damage identification and fracture behavior of 2.5D SiCf/SiC composites under coupled stress states

open access: yesMaterials & Design
Continuous fiber-reinforced silicon carbide composites have received significant attention due to their high-temperature mechanical stability. However, their widespread implementation has been hindered by intricate fracture mechanisms and limited ...
Jie Cui   +7 more
doaj   +1 more source

Effect of Nitrogen Fertilization and Liming on Rye-Ryegrass Yield and Soil pH Dynamics [PDF]

open access: yes
Using ammonium based nitrogen fertilizers in crop production has been shown to acidify soils. Lime used to correct soil pH is an important cost to producers.
Biermacher, Jon T.   +3 more
core   +1 more source

Evolution of Interlayer Coupling in Twisted MoS2 Bilayers

open access: yes, 2014
Van der Waals (vdW) coupling is emerging as a powerful method to engineer and tailor physical properties of atomically thin two-dimensional (2D) materials.
Cao, Ting   +9 more
core   +2 more sources

On-farm trials with rice fish cultivation in the west Kano rice irrigation scheme, Kenya [PDF]

open access: yes, 2006
The viability of integrating rice farming with fish culture was studied in ten (10) rice plots. The on-farm research was done during one rice-growing season starting May 2003.
Auma, E.O., Rasowo, J.
core  

The Theoretical System of Property Rights in China’s General Principles of Civil Law: Theoretical Controversy in the Drafting Process and Beyond [PDF]

open access: yes, 1989
China\u27s General Principles of Civil Law ( General Principles ) is not just a piece of legislation; it represents a system of legal relations with an underlying theoretical framework.
Epstein, Edward J.
core   +1 more source

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