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| Titel: |
A comparison of four soil test procedures for determination of available phosphorus in calcareous soils of the mediterranean region |
| Auteur: |
Matar, A. E. Garabed, S. Riahi, S. Mazid, A. |
| Verschenen in: |
Communications in soil science and plant analysis |
| Paginering: | Jaargang 19 (1988) nr. 2 pagina's 127-140 |
| Jaar: |
1988-02 |
| Inhoud: |
Four procedures (desorption by anion resin, Olsen, ammonium oxalate and calcium lactate), to determine the available P in soils, were compared in a greenhouse study. Five rates of P (0, 55, 110, 165 and 220 mg/kg) were applied to 18 calcareous soils from Syria and yield response of perennial ryegrass (Lolium multiflorum L.) to applied P was measured. Dry weight of tops correlated very well with the anion resin-P or Olsen-P procedures while lactate P and oxalate P results were poorly correlated. Similarly, total P uptake were significantly correlated with both anion resin P (R2=0.85) and NaHCO3-P (R2=0.82) and less so for the oxalate P (R2=0.63) and lactate P (R2=0.32) methods. All 4 soil test procedures were effective in classifying soils into responsive and non-responsive to P. Critical soil P levels were 18.5, 11.5, 9.5 and 7.4 mg/kg for the anion resin, Olsen, lactate and oxalate soil test procedures respectively. The Olsen method is our recommendation for calcareous soils since it is a simple, rapid, and reproducible method that is well correlated with plant response. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 164 gevonden artikelen
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