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Identification of weak links in production technology for bridging the canola yield-gap in Punjab, Pakistan

Published online by Cambridge University Press:  22 February 2023

Shakeel Ahmad*
Affiliation:
Department of Agronomy, Bahauddin Zakariya University, Multan 60800, Pakistan
Muhammad Ali Raza
Affiliation:
The Islamia University of Bahawalpur, Bahawalpur, Pakistan Gansu Academy of Agricultural Sciences, Lanzhou, China
Sajjad Hussain
Affiliation:
Department of Agronomy, Bahauddin Zakariya University, Multan 60800, Pakistan
Ghulam Abbas
Affiliation:
Department of Agronomy, Bahauddin Zakariya University, Multan 60800, Pakistan The Islamia University of Bahawalpur, Bahawalpur, Pakistan
Zartash Fatima
Affiliation:
Department of Agronomy, Bahauddin Zakariya University, Multan 60800, Pakistan
Mukhtar Ahmed
Affiliation:
Department of Agronomy, Pir Meher Ali Shah, Arid Agriculture University Rawalpindi 46300, Pakistan
Muhammad Arif Goheer
Affiliation:
Global Change Impact Studies Centre, Islamabad, Pakistan
Carol Jo Wilkerson
Affiliation:
Independent Scholar, Gainesville, Florida 32614, USA
Axel Garcia y Garcia
Affiliation:
Department of Agronomy and Plant Genetics, University of Minnesota, Lamberton, MN 56152, USA
Gerrit Hoogenboom
Affiliation:
Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA Global Food Systems Institute, University of Florida, Gainesville, Florida, USA
*
Author for correspondence: Shakeel Ahmad, E-mail: shakeelahmad@bzu.edu.pk

Abstract

Understanding the reasons for the yield gap between potential and actual yield can provide insights for enhancing canola production by adapting measures for ensuring food security. The canola yield gap under different management practices (e.g. water, nitrogen, N- and sowing dates) was quantified using research trials that were conducted at on-station and historical data (1980–2016) and the CROPGRO-Canola model for Punjab, Pakistan. The integrated approach revealed that low inputs of N, the amount of irrigation, sowing date and the use of seeds from home stocks were the principal causes for a low yield. The CROPGRO-Canola model was able to simulate the canola yield from research trials (R2 = >0.90) and farm survey data (R2 = 0.63). The average yield gap between potential (YP), N-limited (YNL), water-limited (YWL), N- and water-limited (YNWL), and overall farmer field yield (YOFF) was 50, 46, 62 and 72%, respectively. The yield-gap with achievable yield (YA) for YNL, YWL, YNWL and YOFF was 34, 28, 49 and 63%, respectively. Overall, the results showed that a high canola yield for farmers’ fields can be obtained by selecting appropriate varieties and sowing dates with N rate of 120 kg/ha and efficient irrigation management. However, further studies are necessary to fully comprehend the underlying causes for the low actual yield and the high yield variability of farmers’ fields.

Type
Crops and Soils Research Paper
Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press

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