Evaluation of In-Season Nitrogen Management for Summer Maize in North Central China

Table 1

Weather conditions during summer maize growth season at field sites in 2009.

Sites	Index	June	July	August	September	October	Annual
Hengshui	Tmax (°C)^†	37.3	37.5	36.8	29.9	26.7	37.5
	Tmin (°C)^‡	17.5	19.4	20.3	9.6	5.1	−13.6
	Precipitation (mm)	93.0	123.7	237.0	136.8	21.0	786.4
Xinji	Tmax (°C)	38.4	36.8	33.9	27.4	24.7	38.4
	Tmin (°C)	15.9	15.8	13.2	7.5	4.6	−14.3
	Precipitation (mm)	70.5	155.5	304.0	152.0	34.0	821.7

^†Tmax: maximum temperature. ^‡ Tmin: minimum temperature.