Results 71 to 80 of about 194,720 (307)

The clashing of in situ and pre‐cast technologies—Western trends and local traditions in concrete engineering shaping shell construction in 20th‐century Hungary

open access: yesStructural Concrete, EarlyView.
Abstract After a blossoming pre‐World War II (WWII) period, the concrete construction industry in then‐socialist Hungary existed in a relative isolation from the Western World during the mid‐20th century. In this paper, we focus on the body of work of one of the then newly established state‐owned design offices, IPARTERV, to show how the isolation ...
Orsolya Gáspár, Péter Haba
wiley   +1 more source

Tractors on eBay and Farmers and Consumers Market Bulletin: An Analysis on the Determinants of Price and Price Differences [PDF]

open access: yes
We investigate the determinants of price for tractor auctions on eBay and tractors that are listed in the Farmers and Consumers Market Bulletin (FCMB) in Georgia.
Holland, Liz   +2 more
core   +1 more source

Saving Bambi from the mower? Using a drone with thermal camera to evaluate a low‐tech scaring technique to reduce roe deer fawn mortality during grass harvest

open access: yesWildlife Biology, EarlyView.
Roe deer is a species that hides their neonates as an anti‐predator strategy. This may prove efficient against mammalian predators, such as the red fox; however, it might be an ecological trap as large numbers of fawns are killed by tractors with harvesters each year during grass harvest.
Thomas Vogler   +2 more
wiley   +1 more source

Tractors on eBay: Differences between Internet and In-Person Auctions [PDF]

open access: yes
Internet auction platforms are changing the face of transactions in many business sectors, including agriculture. We provide one of the first systematic examinations of the differences between internet and in-person auctions in agricultural input markets.
Batte, Marvin T.   +2 more
core   +1 more source

Tractor PT: A traction prediction software for agricultural tractor [PDF]

open access: yes, 2007
Traction prediction modelling, a key factor in farm tractor design, has been driven by the need to find the answer to this question without having to build physical prototypes.
Catalán Mogorrón, Heliodoro Fco.   +2 more
core   +1 more source

Conformal superalgebras via tractor calculus [PDF]

open access: yes, 2014
We use the manifestly conformally invariant description of a Lorentzian conformal structure in terms of a parabolic Cartan geometry in order to introduce a superalgebra structure on the space of twistor spinors and normal conformal vector fields ...
Lischewski, Andree
core   +1 more source

The Price Gap in Agriculture‐Based Greenhouse Gas Offset Markets

open access: yesAustralian Journal of Agricultural and Resource Economics, EarlyView.
ABSTRACT Today, there is a global effort to reduce greenhouse gas net emissions (GHGNE). For economic well‐being, it is important to identify low‐cost means of net emission offsets. Agriculture and forestry have received considerable attention as a means of supplying emissions offsets, as they contribute nearly 20% of global emissions.
Jingyi W. Liu   +2 more
wiley   +1 more source

The Diffusion of the Tractor in American Agriculture: 1910-60 [PDF]

open access: yes
This paper examines the impact and diffusion of the gasoline tractor in American agriculture. A key feature of the transition from horses to tractors was a long intermediate stage when both modes of power were used on the same farm.
Alan L. Olmstead, Paul W. Rhode
core  

The Impact of Credit and Training on Farmers Efficiency: A Semi‐Parametric Meta‐Frontier Analysis

open access: yesAustralian Journal of Agricultural and Resource Economics, EarlyView.
ABSTRACT Smallholder farmers in developing countries face several constraints, which affect their productivity. To reduce these constraints and enhance productivity, government and non‐governmental agencies implement programmes that provide credit and training to farmers.
Anthony Baffoe‐Bonnie   +1 more
wiley   +1 more source

Optimal weight and power parameters of crawler tractors to reduce pressure on the soil

open access: yesIOP Conference Series: Earth and Environment, 2019
Crawler and wheeled vehicles are used in a variety of soil and climatic conditions. In the Krasnoyarsk region crawler tractors have a number of advantages.
S. Yuferev   +2 more
semanticscholar   +1 more source

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