1. Methanotrophic bacteria in the rhizosphere of rice microcosms and their effect on porewater methane concentration and methane emission

   • B. Gilbert
   • P. Frenzel

   Original Paper Pages: 93 - 100

2. Evaluation of alternative substrates for determining methane-oxidizing activities and methanotrophic populations in soils

   • I. Watanabe
   • G. Takada
   • K. Inubushi

   Original Paper Pages: 101 - 106

3. Influence of phosphorus or phosphorus-potassium fertilization on biomass and dinitrogen fixation of the stem-nodulating green-manure legume Sesbania rostrata in different marginally productive wetland rice soils

   • K. A. Engels
   • M. Becker
   • J. K. Ladha

   Original Paper Pages: 107 - 112

4. Populations of methanogenic bacteria in paddy field soil under double cropping conditions (rice-wheat)

   • S. Asakawa
   • K. Hayano

   Original Paper Pages: 113 - 117

5. Influence of extractable iron, aluminium, and manganese on P-sorption in flooded acid sulfate soils

   • A. Jugsujinda
   • A. Krairapanond
   • W. H. Patrick Jr.

   Original Paper Pages: 118 - 124

6. Effect of boron sources on garlic (Allium sativum L.) productivity

   • C. Chermsiri
   • H. Watanabe
   • S. Kaewroj

   Original Paper Pages: 125 - 129

7. Long-term effects of inundation dynamics and agricultural land-use on the distribution of soil macrofauna in fluvisols

   • Christoph Emmerling

   Original Paper Pages: 130 - 136

8. Field simulation of wet and dry years in the Chihuahuan desert: soil moisture, N mineralization and ion-exchange resin bags

   • F. M. Fisher
   • Walter G. Whitford

   Original Paper Pages: 137 - 146

9. The role of potassium fertilizer in nodulation and nitrogen fixation of faba bean (Vicia faba L.) plants under drought stress

   • A. M. Abdel Wahab
   • M. H. Abd-Alla

   Original Paper Pages: 147 - 150