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Table 5: Impact fertilizing and liming 5t/ ha -1 CaCO3 on clay illuvial brown soil
Treatment ∆pH P (ppm)
Control 0.15 28.9
N100 0.10 21.4
P70 0.35 30.0
N100 P70 K60 0.90 42.3
N100 P 70 K60 + FYM 0.88 48.2
FYM 0.20 34.9
Table 6: Impact fertilizing and liming 5t/ ha -1 CaCO3 on clay illuvial brown soil
Treatment ∆pH P (ppm)
Control 0.55 14.3
N100 0.20 24.5
P70 0.40 30.4
N100 P70 K60 1.06 48.9
N100 P 70 K60 + FYM 1.00 50.4
FYM 0.35 40.9
CONCLUSIONS
1. The phosphorus content and pH value were found to be strongly dependent both of
treatment and soil type.
2. Soil supplementation with 10t/ha lime has the greatest effect on albic luvisoil pH
that increased with 0.85 units while P content of clay illuvial brown soil raised to
31.2 ppm.
3. Neutralization of soil acidity with limestone not only increases the soil pH, but also
changes the availability of P. Applying 10t ha -1 CaCO3 decreased to 20.5 ppm
(albic luvisoil), 14.3 ppm (clay illuvial chernozem) and 20.4 ppm (clay illuvial
brown soil).
4. This effect can be offset by fertilization. The application of NPK together with
manure increased the P level to 70.1 ppm (clay illuvial brown), 50.4 ppm (clay
illuvial chernozem) and 91.5 ppm (albic luvisoil).
REFERENCES
Havlin, J.L., James, D. Beaton, Samuel L. Tisdale and Werner L. Nelson, (2005):
Soil Fertility and Fertilizers: An Introduction to Nutrient Management 7 th Edition.
Economic Journal, 68: 302-316 p
Larsen, S. (1967): Soil Phosphorus. Advances in Agronomy 19: 105-207 p
Augusta Olivia Lujerdean (2003): Cercetari privind metodologia agrochimica de
determinare a formelor de fosfati din soluri. Teza de doctorat, Universitatea de
Stiinte Agricole si Medicina Veterinara, Cluj-Napoca
Pierysznski, G.M. (2000): Methods of Phosphorus Analyzis for Soils Sdiments
Residuals and Waters. Southern Coop. Series Bull No 396
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