《Table 1–Experimental treatments about the winter wheat-summer maize tillage systems (2012-2013) .》下

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《Soil physical properties and maize root growth under different tillage systems in the North China Plain》

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The summer maize hybrid Zhengdan 958（ZD958），the most popular maize cultivar in China，was used as the experimental material.Each plot was 9 m×40 m=360 m2.Fifteen rows of maize were spaced 0.6 m apart in each plot.Experimental treatments consisted of rotary tillage before sowing winter wheat and no-tillage before sowing summer maize（RTW+NTM），moldboard plowing before sowing winter wheat and no-tillage before sowing summer maize（MPW+NTM），and moldboard plowing before sowing winter wheat and rotary tillage before sowing summer maize（MPW+RTM）.RTW or RTM plots were tilled twice to a depth of 10 cm with a rotary cultivator.The MPW plots were plowed to a depth of 25 cm and then tilled twice to a depth of 10 cm with the rotary cultivator.The NTM plots were sown with no-till seeder without any other seedbed preparation.The details of the tillage treatments are described in Table 1.Each treatment was replicated three times in a completely randomized block design.