Physical Properties
Soil Structure
Sand, silt and clay particles are the primary mineral building blocks of soil. Soil structure is the combination or arrangement of primary soil particles into aggregates. Using aggregate size, shape and distinctness as the basis for classes, types and grades, respectively, soil structure describes the manner in which soil particles are aggregated.
Aggregate Stability
Bulk Density
Water Capacity
Infiltration
Infiltration is the downward entry of water into the soil. The velocity at which water enters the soil is infiltration rate. Infiltration rate is typically expressed in inches per hour. Water from rainfall or irrigation must first enter the soil for it to be of value.
Slaking
2027 Soil Health Conference
The 2027 Soil Health Conference is set for Jan. 26-27 in Sioux Falls! Our outstanding lineup of speakers includes Keith Berns, Chuck Rice, Erin Martin, and many more!
News & Events
FFA Regional Land Judging Winners Receive Scholarships
SD FFA Foundation Rapid City (October 2026) – The South Dakota FFA Foundation is proud to announce the recipients of five $100 scholarships for students placing first in one of the five South Dakota Regional Land Evaluation Competitions this fall. 2026 scholarship...
Growing sunflowers for soil health and stability
By Stan Wise For an agricultural operation to thrive, producers must sometimes look at the big picture and make decisions to benefit the long-term success of their farm or ranch. Changes made on a farm now might take years to realize their positive effects, but those...
Test grain for nitrates before using it as forage
By Stan Wise With the vast majority of South Dakota in a drought and experiencing high temperatures, grain producers are having to make some tough decisions about their crops. Will those grains produce enough yield to make harvesting them a financially viable option,...