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Reductive microbial dissolution of manganese nodules as a possible hazard of deep-sea mining

HELGOLANDER MEERESUNTERSUCHUNGEN Helgol~nder Meeresunters. C. Schiitt & J. C. G. Ottow Universit~t Hohenheim Stuttgart-Hohenheim- Federal Republic of Germany The microbial lysis of deep-sea nodules ... n the n e x t 10-30 years. C. Schfitt & J. C. G. Ottow DISTRIBUTION AND C O M P O S I T I O N M a n g a n e s e n o d u l e s are w i d e l y d i s t r i b u t e d (25-80 % coverage) on the bottom

Yield and nitrogen response of lowland rice (Oryza sativa L.) to Sesbania rostrata and Aeschynomene afraspera green manure in different marginally productive soils in the Philippines

Organic-N fertilizers in the form of flood-tolerant, leguminous, stem-nodulating Sesbania rostrata and Aeschynomene afraspera may be useful alternatives to resource-poor rice farmers if applied as green manure. Therefore, the accumulation of N by these green manure species and their effect on the performance and yield of wetland rice (IR 64) was examined at four different sites...