Knowledge Center Catalog

Temperature, heat indices and photoperiod based mathematical model for emergence of wheat

By: Contributor(s): Material type: ArticleArticlePublication details: 1995ISSN:
  • 1016-4383
Subject(s): DDC classification:
  • 97-146243
 In: Sarhad Journal of Agriculture (Pakistan). (Aug 1995). v. 11(4) p. 429-439Summary: To develop a weather-based model for emergence of wheat in Peshawar, wheat was planted on five dates from 25th October to 25th December. Dates on which wheat seedlings emerged were recorded. Days to seedling emergence and rate of seedling emergence were calculated. From the weather data and photoperiods for the wheat growing season, various indices were calculated for wheat planted on the five dates. Based on coefficient of variation, product of average temperature and photoperiod was found to be the most appropriate index for predicting emergence of wheat as coefficient of determination for cumulative values of this index for the emergence periods of the five dates of sowing was the lowest
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Article CIMMYT Knowledge Center: John Woolston Library AGRIS Collection 97-146243 (Browse shelf(Opens below)) Available
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5 ills., 3 tables, 10 ref. Summary (En)

To develop a weather-based model for emergence of wheat in Peshawar, wheat was planted on five dates from 25th October to 25th December. Dates on which wheat seedlings emerged were recorded. Days to seedling emergence and rate of seedling emergence were calculated. From the weather data and photoperiods for the wheat growing season, various indices were calculated for wheat planted on the five dates. Based on coefficient of variation, product of average temperature and photoperiod was found to be the most appropriate index for predicting emergence of wheat as coefficient of determination for cumulative values of this index for the emergence periods of the five dates of sowing was the lowest

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