1) Crop residues are important resources for smallholder farmers in East Africa but have competing uses that impact their availability and use for conservation agriculture practices.
2) The study found that crop residues from cereals like sorghum, teff and maize in the regions studied are predominantly used for animal feed rather than as mulch to cover soils.
3) Production and use of crop residues is constrained by factors like low soil fertility, high input costs, and lack of information. Ensuring sufficient crop residue production and promoting integrated farming approaches could help balance competing uses and increase soil cover for conservation agriculture.
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Competing uses, dynamics, and production and utilization constraints of crop residues in East Africa: Implications for conservation agriculture
1. Competing uses, dynamics, and production and utilization constraints of crop residues in East Africa: Implications for conservation agriculture 1 Kindu Mekonnen, 2 Gedion Rachier, 3 Dagnachew Lule, 4 Mesfin Bahta, 1 Diego Valbuena, 1 Alan Duncan and 1 Bruno Gerard International Congress on Water 2011: Integrated Water Resources Management in Tropical and Subtropical Drylands , Mekelle, Ethiopia, 19-26 September 2011 1 International Livestock Research Institute (ILRI), P.O. Box 5689, Addis Ababa, Ethiopia . 2 Kenya Agricultural Research Institute (KARI), P.O. Box 169, Kakamega, Kenya 3 Bako Agricultural Research Center (BARC), P.O. Box 03, Bako, Ethiopia 4 Sirinka Agricultural Research Center (SARC), P.O. Box 74, Woldia, Ethiopia
11. Area coverage of crops and hh growing them in the main rainy season at the three east African sites. Note: nd-there is no data, and np- there is no practice Cropping systems Land allocated (ha) Area coverage (%) HHs growing (%) Kobo cereals 963 97 75 legumes 19 2 37 oil crops nd nd nd hort. crops 5 1 8 fallow np np np Nekemte cereals 581 74 78 legumes 13 2 46 oil crops 54 7 59 hort. crops 24 3 85 fallow 107 14 71 Kakamega cereals 1238 31 53 legumes 859 22 89 oil crops nd nd nd hort. crops 1776 44 75 fallow 133 3 nd
12. 3.2. Cropping technologies Area (%) Kobo Nekemte Kakamega tillage by tractor 6.43 (11.4) np 14.4 (17.7) tillage by animal 99.5 (1.4) 100.0 (0.0) 63.8 (28.9) new seed 2009 25.2 (36.5) 28.3 (32.0) 89.4 (4.2) chemical fertilizer 1.8 (2.9) 72.8 (19.4) 78.8 (13.8) manure application 9.3 (14.1) 22.3 (26.0) 54.4 (28.2) hand weeding 100.0 (0.0) 97.9 (6.0) 97.8 (3.5) herbicide application 34.1 (26.8) 51.1 (29.4) 2.8 (4.0) pesticide application 25.3 (38.4) 39.5 (33.0) 4.1 (3.2) thresher use np 4.0 (0.0) 1.0 (0.0) chopper use for feed np np 2.3 (2.3) Data represent means with standard deviations in parentheses. The number of villages (n) is 8 for each of the three east African sites.
13. 3.3. Competing uses of crop residues 0 20 40 60 80 100 120 Kobo Nekemte Kakamega other uses households fuel stall feeding sell from home and field grazing by animals left as mulch