Literaturrecherche

Literatur Singhania RA, Rietz E, Söchtig H, Sauerbeck D (1983) Chemical transformation and plant availability of zinc salts added to organic manure. Plant Soil 73(3):337-344

Literatur Stott DE, Kassim G, Jarrell WM, Martin JP, Haider K (1983) Stabilization and incorporation into biomass of specific plant carbons during biodegradation in soil. Plant Soil 70(1):15-26

Literatur Dambroth M, El Bassam N (1983) Low input varieties : definition, ecological requirements and selection. Plant Soil 72(2/3):365-377