H. Liebig

Evaluation of current fertilizer practice and soil fertility in vegetable production in the Beijing region

Peter Christie, P. Christie, Xiaolin Li, 2004, Nutrient Cycling in Agroecosystems.

Use of a Modified N-Expert System for Vegetable Production in the Beijing Region

P. Christie, Xiaolin Li, Hongyan Zhang, 2005 .

Effects of Different Nitrogen Rates on Open-Field Vegetable Growth and Nitrogen Utilization in the North China Plain

Xiaolin Li, D. Horlacher, Qing Chen, 2004 .

Cultivar and temperature effects on starch in the primary thickening meristem of onion bulbs

M. Ernst, M. Ritzkowski, H. Liebig, 1999 .