Results 81 to 90 of about 237,469 (171)

Non-inverting Tillage: Early-Stage Effects on Soil Mechanical Behaviour [PDF]

, 2000
Organic farmers often claim positive effects of non-inverting and reduced tillage systems. There is a need of quantifying tilth characteristics in the former plough layer of soil converted to such tillage systems.
Munkholm, Lars J, Rasmussen, Karl J, Schjønning, Per   +2 more
core  

Nutrient Profiling and Water Repellency of Cover Crop Residues in Southern United States Agroecosystems

Soil Systems
Integrating cover crops (CCs) into crop rotations has gained interest in the Southeastern United States due to the benefits that CCs offer, which improve soil health for agricultural production.
Payton B. Davis, Dara M. Park, Brook T. Russell, Debabrata Sahoo   +3 more
doaj   +1 more source

Morphology Scaling of Drop Impact onto a Granular Layer

, 2010
We investigate the impact of a free-falling water drop onto a granular layer. First, we constructed a phase diagram of crater shapes with two control parameters, impact speed and grain size.
Katuragi, Hiroaki, 桂木, 洋光
core   +1 more source

Stratospheric cruise emission reduction program [PDF]

, 1977
A recently implemented NASA effort specifically aimed at reducing cruise oxides of nitrogen from high-altitude aircraft is discussed. The desired emission levels and the combustor technology required to achieve them are discussed. A brief overview of the
Diehl, L. A., Marek, C. J., Reck, G. M., Szaniszlo, A. J.   +3 more
core   +1 more source

Slurry infiltration tests for slurry shield tunnelling in saturated sand [PDF]

, 2016
Tunnelling in saturated sand will cause excess pore pressures in the sand. This was the case during the construction of all tunnels in the Netherlands. This excess pore pressure influences the stability of the tunnel face.
Bezuijen, Adam, XU, T
core   +1 more source

Microdroplet Contaminants: When and Why Superamphiphobic Surfaces Are Not Self-Cleaning

, 2020
Baumli, P., Butt, H., Corrales, T., Kaltbeitzel, A., Kappl, M., Naga, A., Papadopoulos, P., Vollmer, D., Wong, W.   +8 more
core   +1 more source

Atomization and mixing study [PDF]

The state of the art in atomization and mixing for triplet, pentad, and coaxial injectors is described. Injectors that are applicable for LOX/hydrocarbon propellants and main chamber and fuel rich preburner/gas generator mixture ratios are of special ...
Ferrenberg, A., Jaqua, V. W.
core   +1 more source

Global change factors differ in effect when acting alone and in a multi-factor background. [PDF]

Nat Commun
Rongstock R, Li H, Lehmann A, Wulf A, Rillig MC.   +4 more
europepmc   +1 more source

RAWS: The spaceborne radar wind sounder [PDF]

The concept of the Radar Wind Sounder (RAWS) is discussed. The goals of the RAWS is to estimate the following three qualities: the echo power, to determine rain rate and surface wind velocity; the mean Doppler frequency, to determine the wind velocity in
Moore, Richard K.
core   +1 more source

Silica Sol-Gel Coatings for Solar Panels: Drop Friction and Particle Adhesion. [PDF]

ACS Appl Mater Interfaces
Karakaya T, Albarqawi S, Sabath F, Sharifi-Aghili A, Yavuz E, Vollmer D.   +5 more
europepmc   +1 more source