Mapping of First-Frost Days and Risk of Forst Damage to Soybeans

Ryoji Sameshima, Tomoyoshi Hirota, Takahiro Hamasaki

研究成果: Contribution to journalArticle

1 引用 (Scopus)


Statistically expected early first-frost days with return periods from 2 to 30 y (EFFDk, where k represents the return period) were calculated by fitting frost records obtained at weather stations to the Weibull distribution function. To create 1 km2 mesh maps of EFFDk, a method to estimate EFFDkwas developed by relating k to the normals of daily minimum air temperature (Tm). An equation to calculate the probability of occurrence of the first frost before day x ((P (X ≤ x)) from Tm was derived. Risk of early first-frost damage to soybeans was defined as (P (X ≤ maturity day). Day of maturity was estimated with existing soybean developmental models, and risk maps of first-frost damage to soybeans were created.

ジャーナルjournal of agricultural meteorology
出版物ステータス出版済み - 9 1 2007

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Atmospheric Science

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