@article{Poudel:198004,
      recid = {198004},
      author = {Poudel, Mahadeb Prasad and Chen, Shwu-En},
      title = {Trends and Variability of Rice, Maize, and Wheat Yields in  South Asian Countries: A Challenge for Food Security},
      journal = {Asian Journal of Agriculture and Rural Development},
      address = {2012-12},
      number = {393-2016-23885},
      series = {8-157-AJARD-584-597},
      pages = {14},
      year = {2012},
      abstract = {During the last six decades, the yield and production of  rice, maize, and wheat grew remarkably in South Asian  region. As these cereals are staple foods, the growth and  fluctuation of yields greatly impacts on food security.  This study aims to examine the growth patterns and  variability of rice, wheat, and maize yields in South Asian  countries namely Bangladesh, India, Nepal, Pakistan, and  Sri Lanka. Utilizing the yield data during 1961-2010, we  applied the linear and quadratic regressions for yield  trends and variability analyses. Quadratic model was fitted  well in all data sets except wheat yield in Pakistan. A  clear indication of slowing growth rates was observed for  wheat yield in Bangladesh and India, as well as a  significant increase in maize yield variability was  realized in Bangladesh, India, Pakistan, and Sri Lank. The  factors influencing for slowing yield growth rates are  considered as comparative disadvantage of wheat to Boro  rice in case of Bangladesh, whereas depletion of soil  nutrient contents in the rice-wheat production areas and  negative impact of climate change in India. The slowing  yield growths exerted a challenge for food security in  Bangladesh and India. Thus, policy implementations are  urgent to improve the wheat yield growth and maize yield  stabilization in the concerning countries.},
      url = {http://ageconsearch.umn.edu/record/198004},
      doi = {https://doi.org/10.22004/ag.econ.198004},
}