Bibliography on the effect of NH4 on Mg uptage of crops (1967-1957)

Bibliography on the effect of NH4 on Mg uptage of crops (1967-1957) text xx England Commonwealth Bureau of Soils 1968 9999 monographic und 3p. Bibliography,Soil science,Magnesium 016:631.416.11 '81.031.811.6:633 1957/67 K7 140224