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HKJHashemite Kingdom of Jordan
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References in periodicals archive ?
Cressey PJ, Monk GR, Powell HKJ, Tennent DJ (1983) Fulvic acid studies: evidence for a polycarboxylate co-ordination mode at soil pH.
Powell HKJ, Town RM (1993) Aluminium(III)-malonate equilibria: a potentiometric study.
Adams ML, Hawke DJ, Powell HKJ, Nilsson NHS (2000) The relationship between soil solution pH and [Al.sup.3+] concentrations in a range of South Island (New Zealand) soils.
Hawke DJ, Powell HKJ (1994) Flow-injection analysis applied to the kinetic determination of reactive (toxic) aluminium: comparison of chromophores.
Gregor JE, Powell HKJ (1986) Acid pyrophosphate extraction of soil fulvic acids.
Powell HKJ, Hawke DJ, Scott D (1997) Free aluminium and related parameters in soil solution from a South Island (New Zealand) high country site under contrasting S and P fertilisation.