A comparative study of lower and upper limits of temperature in meas uring the variability of day-degree summations of wheat, barely, and ry e. - Nuttonson, Michael Y. , 1904- (Washington : American Institute of Crop Ecology, 1956)
"Sponsored by the United States Weather Bureau under contract Cwb-87 37"
Keywords: Wheat; Barley; Rye; Plants -- Effect of temperature on