REVISION DEL GENERO ANOPTICHTHYS CON DESCRIPCION DE UNA ESAN LUIS POTOSIECIE NUEVA PISC CHARACIDAE
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Instituto Nacional de Cardiología, CD MEXICO, DF, MEX
Abstract
K2O and P2O5 deficiencies of 55 soil samples detd by the A niger method (Niklas technic, modified by Mehlich) are compared with the ones obtained by the Azoto-bacter soil plaque method (Sackett-Stewart and Halversen-Hoge technics) and by the Morgan quic