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

Ryoji Sameshima; Tomoyoshi Hirota; Takahiro Hamasaki

doi:10.2480/agrmet.63.25

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

Ryoji Sameshima, Tomoyoshi Hirota, Takahiro Hamasaki

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Statistically expected early first-frost days with return periods from 2 to 30 y (EFFD_k, 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 EFFD_k, a method to estimate EFFD_kwas developed by relating k to the normals of daily minimum air temperature (T_m). 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.

Original language	English
Pages (from-to)	25-32
Number of pages	8
Journal	journal of agricultural meteorology
Volume	63
Issue number	1
DOIs	https://doi.org/10.2480/agrmet.63.25
Publication status	Published - Sept 1 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

Agronomy and Crop Science
Atmospheric Science

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abstract = "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.",

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AU - Hirota, Tomoyoshi

AU - Hamasaki, Takahiro

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

Abstract

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