Peter Christie

Nitrogen balance and groundwater nitrate contamination: comparison among three intensive cropping systems on the North China Plain.

Fusuo Zhang, X. Ju, P. Christie, 2006, Environmental pollution.

Crop Yields, Internal Nutrient Efficiency, and Changes in Soil Properties in Rice–Wheat Rotations Under Non-Flooded Mulching Cultivation

M. Fan, Xiangzhong Zeng, Peter Christie, 2005, Plant and Soil.

Changes in the soil environment from excessive application of fertilizers and manures to two contrasting intensive cropping systems on the North China Plain.

X. Ju, P. Christie, F. Zhang, 2007, Environmental pollution.