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Effect of weather on organic cropping systems in Kenya

Birech, Mrs Rhoda; Freyer, Prof. Bernhard; Friedel, Prof. Juergen and Leonhartsberger, Mr. Philipp (2008) Effect of weather on organic cropping systems in Kenya. Poster at: Cultivating the Future Based on Science: 2nd Conference of the International Society of Organic Agriculture Research ISOFAR, Modena, Italy, June 18-20, 2008.

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Summary

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.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:rainfall, Dolichos lablab, cropping systems, organic farming
Subjects: Farming Systems
Research affiliation: International Conferences > 2008: IFOAM OWC: Research Track / ISOFAR > 7.1 Production systems
Austria > Univ. BOKU Wien > Sustainable Agr. Systems - IfÖL
Deposited By: Birech, Mrs Rhoda
ID Code:11974
Deposited On:15 Sep 2008
Last Modified:12 Apr 2010 07:36
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information: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

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