Intensification of dryland farming in Mali through mechanisation of sowing, fertiliser application and weeding

Aune, Jens B. , Coulibaly, Adama , Woumou, Kamkam

2019-02-23 ARCHIVES OF AGRONOMY AND SOIL SCIENCE 2019   65(卷), 3(期), (400-410页)

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This study focuses on the role of mechanised sowing and weeding in combination with seed priming and fertiliser microdosing in Mali. Mechanised sowing and weeding were based on using a combined donkey-drawn planter/weeder and a motorised planter/weeder. The research methods included studies of seed delivery in manual and mechanised sowing, field experiments on different levels of mechanization/intensification, labour studies on mechanisation and an economic assessment of the different levels of intensification. The average sorghum grain yield across three years increased by 352 kg ha(-1) (43.7% increase) by combining mechanisation with seed priming and microdosing of 0.2 g NPK 15-15-15 fertiliser per pocket compared to a control with manual sowing but without seed priming and microdosing. The labour demand (sowing and weeding) for manual, donkey-drawn and motorised operations was 184, 67 and 47 hours ha(-1), respectively. An economic analysis showed that the donkey-drawn planter/weeder is the appropriate mechanisation below six ha while above this land size it becomes increasingly interesting for the farmers to invest in a motorised planter. The use of mechanisation will result in earlier and uniform crop establishment, facilitate microdosing application, timelier weeding, higher yields, better economic return and reduced labour demand.