Abstract
SummaryThe diffusion of indigenous nitrate from small (<5 mm) aggregates of a clay‐loam soil, and added bromide from larger (30–70 mm) clods of a sandy clay, were studied under saturated conditions. The time (t0.5) taken for half the diffusional solute loss to occur from the small aggregates was well related to the square of the aggregate radius (a2). The impedance factor (fi) of 0.54 calculated from the t0.5 v. a2 relationship gave satisfactory results in simulations of the measured Mt/M∞. v. time curves. t0.5 was also well related to a2 for the clods, but the ft values calculated from it were not only very large (>0.9) but also decreased with increasing clod size, possibly because of anion exclusion effects.The model simulated bromide diffusion from chalk cubes of mixed sizes better when computations were made for each size than when a single volume‐averaged size was taken.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
