11974 1 archive 7929 disk0/00/01/19/74 2008-09-15 2009-08-20 14:37:46 2009-08-20 14:37:46 conference_item show 0 en This paper is published in the conference proceedings: Neuhoff, Daniel; Halberg, Niels; Alföldi, Thomas; Lockeretz, William; Thommen, Andreas; Rasmussen, Ilse A.; Hermansen, John; Vaarst, Mette; Lueck, Lorna; Carporali, Fabio; Jensen, Henning Hogh; Migliorini, Paola and Willer, Helga, Eds. (2008). Cultivating the Future Based on Science. Proceedings of the Second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), held at the 16th IFOAM Organic World Congress in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the Consorzio ModenaBio, 18 - 20 June 2008 in Modena, Italy. International Society of Organic Agriculture Research (ISOFAR), c/o IOL, DE-Bonn, Research Institute of Organic Agriculture FiBL, CH-Frick. http://orgprints.org/13672 and http://orgprints.org/13674 int-conf-owc-2008-research-07-1 a-uni-wien-boku-ifoel June 18-20, 2008 Cultivating the Future Based on Science: 2nd Conference of the International Society of Organic Agriculture Research ISOFAR Modena, Italy yes 0 TRUE poster Birech Rhoda Mrs Freyer Bernhard Prof. Friedel Juergen Prof. Leonhartsberger Philipp Mr. pub 2farming rainfall, Dolichos lablab, cropping systems, organic farming Rainfall is the single most important factor affecting yield and biomass accumulation by crops as well as residue decomposition in the tropics. The ability to capture this resource in organic systems calls for appropriate techniques. Kenya experiences bimodal type of rainfall with two rainfall peaks; the long (730 mm) and the short (376 mm) rains. Rainfall fluctuations in both seasons are becoming more common in the recent years with a likelihood of crop failure in one out of five years. The question addressed was how to utilize the short rains for food and biomass production. Lablab (Dolichos lablab), a N-fixing legume was sown in the short rains and the seeds harvested. The effect of lablab biomass incorporation on organic maize and potatoes planted in the long rains was evaluated in comparison with farmyard manure application. The 3-year trial showed that dry matter biomass (1.95 t/ha) and grain yield (0.5 t/ha) of lablab was a factor of the amount of rainfall. The amount of lablab biomass applied was proportional to maize grain and potato tuber yields. Similarly, amount of yield and biomass in the long rains was species specific and were a factor of both rainfall amounts and distribution. 2008 published Bergamaschi H., Wheeler T.R., Challinor A.J., Comiran F., Heckler B.M. (2007): Relationships between maize yield and rainfall on different temporal and spatial scales in subtropical Southern Brazil. Pesquisa Agropecuária Brasileira. 42:603-613. Hagedorn, F., Steiner, K.G., Sekayange L., Zech, W. (1997): Effect of rainfall pattern on nitrogen mineralization and leaching in a green manure experiment in South Rwanda. Plant and Soil. 195:365-375. Lelei J.N. (2004): Impact of soil amendments on maize performance and soil nutrient status in legume maize intercropping and rotation systems in Central Rift Valley Province of Kenya. Ph.D. thesis, University of Natural Resources and Applied Life Sciences, Austria. Thomson B.D., Siddique K.H.M., Barr M.D., Wilson J.M. (1997): Grain legume species in low rainfall Mediterranean-type environments I. Phenology and seed yield. Field Crops Research. 54:173-187. public 8356 1 11974 2 application/pdf de public

Isofar_Paper_Birech_Freyer_Friedel_Leonhartsberger_2008.pdf

Isofar_Paper_Birech_Freyer_Friedel_Leonhartsberger_2008.pdf 42629 http://orgprints.org/11974/2/Isofar_Paper_Birech_Freyer_Friedel_Leonhartsberger_2008.pdf