Supported by Natural Science Research Foundation Item of Ningxia University,China(ZR1208);Science and Technology Research Item of Ningxia Colleges and Universities,China(NGY2014065)~~
[Objective] The research aimed to explore the most suitable gravel cover- ing thickness for selenium sand melon in arid region of central Ningxia. [Method] The natural gravel, which was from Nanshantai Region in Zhong...