[The potassium metabolism of typical northern Algerian soils. I. Global evaluation of the potassium supply of soils].
In samples from 87 and 39 profiles, respectively, of typical Northern Algerian soils the following parameters were determined of the K content: total K, exchangeable and water soluble K, K saturation degree, and potassium replenishment capacity. The latter was carried out by four methods (N HCl 50 degrees C, HNO3 boiling, 0.05 and 0.2 N NaTPB). The results obtained were used to check the widespread view that Algerian soils are well supplied with K. The following grouping is suggested from the results of the investigation: --soils with high to very high values for all forms of K (50% of the samples), --soils with lower and medium values for exchangeable K, which require K fertilization actually or in the near future if K uptake by crops increases (30 to 35% of the samples), --soils with TPB values indicating a high binding strength of Ki in which a very limited replenishment power can be expected despite partly high or very high values of acid soluble K (more than 25% of the samples). These results indicate that it is necessary to differentiate the assessment of the K content of Algerian soils.
D000462:Algeria; D011188:Potassium / Q000032:analysis*; D011891:Rain; D012987:Soil / Q000032:analysis*
D012987:Soil; D011188:Potassium
Untersuchungen zum K-Haushalt typischer Böden Nordalgeriens. I. Die globale Bewertung des K-Versorgungsgrades der Böden.