<p>1. Adsorption Properties of Subtropical and Tropical Variable Charge Soils: Implications from Climate Change and Biochar Amendment<br>Ren-kou Xu, Nikolla P. Qafoku, Eric Van Ranst, Jiu-yu Li and Jun Jiang<br>2. Groundwater Depletion by Agricultural Intensification in China’s HHH Plains, Since 1980s<br>Xiangbin Kong, Xueliang Zhang, Rattan Lal, Fengrong Zhang, Xunhong Chen, Zhenguo Niu, Lei Han and Wei Song<br>3. Impact of Climate Change Factors on Weeds and Herbicide Efficacy<br>Aruna Varanasi, P.V. Vara Prasad and Mithila Jugulam<br>4. Scientific Underpinnings of the System of Rice Intensification (SRI): What Is Known So Far?<br>Amod K. Thakur, Norman T. Uphoff and Willem A. Stoop<br>5. Molecular and Genomic Tools Provide Insights on Crop Domestication and Evolution<br>Mulatu Geleta and Rodomiro Ortiz</p>