The influence of different methods of applying radioactive phosphorus on the E- and L-values was studied in four foil types using barley, buckwheat, and rye grass for the L-value determination. The four soils differed greatly in their E- and L-values. The experiment was carried out both with and without carrier-P. The presence of carrier-P had no influence on the E-values, while carrier-P in some cases gave a lower Lvalue. Both E- and L-values depended on the method of application. When the 32P was applied on a small soil or sand sample and dried before mixing with the total amount of soil, the E-values were higher than at direct application most likely because of a stronger fixation to the soil/sand particles. This was not the case for the L-values that are based on a much longer equilibrium time. On the contrary, the direct application of the 32p-solution to the whole amount of soil gave higher L-values of a non-homogeneous distribution of the 32P in the soil.
|Place of Publication||Roskilde|
|Publisher||Risø National Laboratory|
|Number of pages||21|
|Publication status||Published - 1980|
|Series||Denmark. Forskningscenter Risoe. Risoe-R|