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Heat units requirements of maize inbred lines for pollen shedding and silking: results of the European FAO network



Heat units requirements of maize inbred lines for pollen shedding and silking: results of the European FAO network



Maydica 35(1): 41-46



Ten methods were used to calculate the number of heat units required for various growth phases (from sowing and emergence to silking and pollen shedding) in 10 inbred lines in 8 countries over 2 years. The best methods were the sums of mean or maximum daily temperatures. Results showed that use of heat units gave accurate estimates of silking time. The coefficient of variation of the sowing to silking period was about 14% when calculated using days and 6.5% using the best heat sums method.

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