Phosphorus availability under alley cropping and mulched and unmulched sole cropping systems in Costa Rica
作者： J. P. Haggar , G. P. Warren , J. W. Beer , D. Kass
DOI: 10.1007/BF00011206
关键词:
摘要: Phosphorus availability was measured in soils under five cropping systems: alley with Erythrina poeppigiana, Gliricidia sepium, sole poeppigiana mulch applied, sepium no mulch. The following parameters were measured: 1) plant-available soil P assessed by uptake of maize and bean bioassay plants; 2) phosphate desorbable anion exchange resin; 3) adsorption added into isotopically exchangeable non-exchangeable pools.
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