This quantity is calculated by forming a paste of a saturated analyte and measuring the electric conductivity. For 10 points each:
[10m] Identify this quantity commonly expressed in decisiemens per meter. Solonetz (“sol-UH-nets”) is a material particularly high in this quantity.
ANSWER: soil salinity [prompt on salinity by asking "of what type of material?"; reject "sodicity" or "soil sodicity"]
[10e] The primary human contribution to soil salinization is this farming practice, often carried out using a tool with a center pivot. Simcha Blass developed the modern "drip" method for this practice.
ANSWER: irrigation [accept center pivot irrigation or drip irrigation]
[10h] Switchgrass and other plants in this ecosystem can survive saline soils due to their extensive root systems. This ecosystem, which dominates to the east of the 100th meridian west, was nearly wiped out after the invention of the steel plow and has been the subject of ecological restoration efforts.
ANSWER: tallgrass prairie [prompt on prairie]
<RR, Other Science>