211 - EXCHANGEABLE ACIDITY

spectrophotometry; exchangeable acidity by extraction with a 1 M solution ...

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to low soil of. Key words: Medicago,. INTRODUCTION. 1991, 1992 and 1993 in of. 57 sites a ... spectrophotometry; exchangeable acidity by extraction with a 1 M solution .... Bolton, J.,. Effects of potassium, magnesium and sodium fertilizers and lime on the yield and ... Gama, M.V., ... IVth International Rangeland Congress,

Gama, M.V.,

Potássio de troca segundo dois métodos de extracção. Agronomia lusit.,

Gama, M.V.,

Potássio de troca segundo dois métodos de extracção. Agronomia lusit.,