|Title:||The spatial patterns in long-term temporal trends of three major crops’ yields in Japan||Authors:||Chen, Hungyen||Keywords:||agricultural production | Agronomy & Crop Ecology | Crop model | long-term variation | stagnation||Issue Date:||3-Jul-2018||Publisher:||TAYLOR & FRANCIS LTD||Journal Volume:||21||Journal Issue:||3||Start page/Pages:||177||Source:||Plant Production Science||Abstract:||
© 2018, © 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. Long-term trend of crop yields has been widely studied in global scales to find which crops and which geographic regions offer the best hope of meeting food demands, and which regions needed the most improvements. In this study, a mathematical method was applied to analyze spatial patterns in long-term temporal trends of three major crops’ yields in Japan archipelago. The changes in annual yields of rice, wheat, and soybean over a period of about 60 years in all 47 prefectures of Japan was analyzed by using the data of agricultural records. For all the three crops, the nationwide yields previously improved, but currently were stagnating in Japan. The result suggests that the annual yields were not improving in 53, 85, and 89% of those prefectures in Japan for rice, wheat, and soybean, respectively. The spatial patterns in temporal trends show that the percentage of number of yield-not-improving prefecture was higher in low latitude regions than high latitude regions. These results highlight the increasingly difficult challenge of meeting the growing demands and stagnating supplies in daily staple foods not only for agricultural scientists but also for Japanese society.
|Appears in Collections:||農藝學系|
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