#Soil centrifuging method #pdf, using sodium hexametaphosphate and an ultrasonic probe, suggesting 750 rpm.
on 02017-01-03how to centrifuge #soil to analyze it into parts, using sodium hexametaphosphate and an ultrasonic probe to disperse it in water. Separates silt from clay.
on 02017-01-03ASTM’s D-2974 standard for #moisture #sensing of #soil, plus other soil analysis. They specify oven-drying and burning, which I guess makes sense if you want the most precise values.
on 02017-01-03overview of #soil #moisture #sensing #hardware, including oven-drying; neutron thermalization sensing; gamma-ray attenuation sensing; and electromagnetic sensing (of resistivity or polarization), including measuring via a porous block; tensiometers; microwave thermal emission sensors; NMR sensors; simple thermal sensing; time-domain reflectometry; hygrometric techniques using air in equilibrium with the soil; electrolysis current measurement; and optical methods. By Nicole Huggins-Rawlins.
on 02017-01-03