@article{Kim:330822,
      recid = {330822},
      author = {Kim, Jisu},
      title = {Forecasting Bulb Weight of Median-Late Variety Onion Using  Growth Indicators and Meteorological Factors},
      journal = {Journal of Rural Development/Nongchon-Gyeongje},
      address = {2021-09-30},
      number = {1071-2023-492},
      month = {Sep},
      year = {2021},
      abstract = {This study develops a forecasting model for bulb weight of  median-late variety onion to alleviate supply-demand  imbalance. The actual measurement data in 2020/2021 are  from the Korea Rural Economic Institute (KREI). A  multilevel model is applied to reflect the hierarchical  data characteristics consisting of growth indicators in  individual units and meteorological factors in parcel  units. The results are as the following: The harvest timing  should be considered when constructing the forecasting  model since the weights vary depending on that. The growth  indicators, especially the number of leaves, at the early  bulb enlargement period and the number of optimum  temperature days during the bulb enlargement period show  the positive effects on the bulb weight at the harvest. It  is possible to forecast the growth indicators at the early  bulb enlargement period using those at the early leaf  elongation period. When applying the estimation results for  2020 and 2021 data, the growth indicators at the early bulb  enlargement period can be explained as much as about 90%  based on those at the early leaf elongation period.},
      url = {http://ageconsearch.umn.edu/record/330822},
      doi = {https://doi.org/10.22004/ag.econ.330822},
}