Nitrogen and phosphorus limitation of soil microbial respiration in two tropical agroforestry parklands in the south-Sudanese zone of Burkina Faso: The effects of tree canopy and fertilization By Zacharia Gnankambarya, Ulrik Ilstedt, Gert Nyberg, Victor Hien, Anders Malmer Tagged with: Faidherbia albida, Microbial respiration, Nitrogen, Nutrient limitation, Phosphorus, Vitellaria paradoxa