Wet fixation of potassium in an Iraqi soil, Ameriya silty clay loam.
The wet fixation capacity of K was studied under varying conditions in an alkaline, calcareous, and alluvial Iraqi soil. The variations concerned the soil-water proportion, K concentration, type of K salt added, and temperature, with the time for equilibrium calibration remaining constant at seven days. K fixation increases with increased K addition, i.e. with an increased content of water soluble and exchangeable potassium, but also with an increase in temperature from 30 to 60 degrees C. Increasing the temperature changes the relation between the level of the K addition and its fixation. Factors like the relation between soil and solution, type of K salt, and microbial activity do not exert any remarkable influence on the fixation.
D011188:Potassium / Q000502:physiology*; D012987:Soil
D012987:Soil; D011188:Potassium