Variations of growth, nitrogen accumulation and nitrogen use efficiency among 18 willow clones under two nitrogen regimes

• Weidong Yang, Zhiqiang Zhu, Fengliang Zhao, Zheli Ding, Muhammad Tariq Rafiq, Yuyan Wang, Xincheng Zhang, Xiaoe Yang

• Agroforestry Systems, September 2014, Springer Science + Business Media
• DOI: 10.1007/s10457-014-9742-1