Andersen, A.J.

Nielsen, Gunnar Gissel

Selvaratnam, V.V.

Sümer, S.

Thomsen, J.D.

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

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Labile soil phosphorus as influenced by methods of applying radioactive phosphorus

http://orbit.dtu.dk/ws/files/12697747/ris_r_409.pdf

Labile soil phosphorus as influenced by methods of applying radioactive phosphorus

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Online Research Database In Technology