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Assessment of the relations between crop yield variability and the onset and intensity of the West African Monsoon

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Relation http://oar.icrisat.org/12058/
https://www.sciencedirect.com/science/article/abs/pii/S0168192323001235?via%3Dihub
https://doi.org/10.1016/j.agrformet.2023.109431
 
Title Assessment of the relations between crop yield variability and the onset and intensity of the West African Monsoon
 
Creator Joseph, J E
Akinseye, F M
Worou, O N
Faye, A
Konte, O
Whitbread, A M
Rötter, R P
 
Subject Climate Smart Agriculture (CSA)
Soil
Others
West Africa
 
Description Timely information on the onset of rain is essential for effectively adapting to climate variability and increasing the resilience of rain-fed systems. However, defining optimal sowing dates based on the onset of rain has been challenging. We compared and analyzed the West African Monsoon onset according to Raman’s, modified
Sivakumar’s, Yamada’s, and Liebmann’s definitions using station data from 13 locations in Senegal from 1981 to 2020. Subsequently, we systematically analyzed the effect of the differently estimated monsoon onsets(WAM-OS) on maize development. To this end, we applied the set of the generated WAM-OS as sowing dates in simulations
of maize growth and yields, applying the Agricultural Production Systems sIMulator(APSIM) at 13 locations representing different agroclimatic regions across Senegal. We examined the impact of the sowing dates under variable conditions of soil organic carbon(SOC) and plant available water capacity(PAWC). Our analysis showed
statistically significant differences between the WAM-OS dates, rainfall characteristics computed for these, and maize yields simulated using different sowing dates according to the WAM-OS definitions. We found Liebmann’s onset dates were most suitable for both hydrological and agronomic applications since they were characterized
by the lowest probabilities of prolonged dry spells after onset, the highest amount of rainfall in the mid-season, and the highest simulated maize yields compared to other onset definitions. Our results highlight the importance of sowing dates and their accurate prediction for improving crop productivity in the study area. We also found
SOC and PAWC were important factors that improved maize yields. We recommend improved access to climate information services to help smallholder farmers get timely information that helps them in their sowing decisions and encourage agronomic interventions that improve the SOC level, soil pore volume to retain more water and
other soil properties directly(e.g., tillage) and indirectly(suited cropping systems) that contribute to enhancing crop productivity.
 
Publisher Elsevier
 
Date 2023-03-19
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/12058/1/Agricultural%20and%20Forest%20Meteorology_333_1-10_2023.pdf
Joseph, J E and Akinseye, F M and Worou, O N and Faye, A and Konte, O and Whitbread, A M and Rötter, R P (2023) Assessment of the relations between crop yield variability and the onset and intensity of the West African Monsoon. Agricultural and Forest Meteorology, 333. pp. 1-10. ISSN 0168-1923