Seasonal Dynamics of Soil C[O.sub.2] Concentration and C[O.sub.2] Fluxes from the Soil of the Former Lake Texcoco, Mexico von Ikkonen, E.N, Garcia-Calderon, N.E, Ibanez-Huerta, A, Etchevers-Barra, J.D, Krasilnikov, P.V

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The Role of Light in Cucumber Plant Response to a Diurnal Short-Term Temperature Drop von Ikkonen, E N, Shibaeva, T G, Titov, A F

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The C[O.sub.2] Concentration in Soils of Montane Cloud Forests of Southern Mexico von Ikkonen, E.N, Garsia-Calderon, N.E, Avarez-Arteaga, G, Ibanez-Huerta, A, Fuentes-Romero, E, Hernandez-Solis, J.M

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DEVICE FOR TAKING SAMPLES OF SPECIFIC PEAT SOILS von IKKONEN E.N, TYCHININ V.V, KURETS V.K

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