Nutrient flows and intensification options for smallholder farmers of the Lao uplands - Epper, Carole A.; Paul, Birthe K.; Burra, Dharani Dhar; Phengsavanh, Phonepaseuth; Ritzema, Randall S.; Syfongxay, Saysompheng; Groot, Jeroen C.J.; Six, Johan; Frossard, Emmanuel; Oberson, Astrid; Douxchamps, Sabine (Elsevier, 2020)