Fig. 6From: Plastic film mulching with ridge planting alters soil chemical and biological properties to increase potato yields in semiarid Northwest ChinaEffects of plastic film mulching treatments for potato on tuber yield. Different lowercase letters indicate significant differences among treatments within a year (P < 0.05). FP, flat plot without film mulching; FPM, flat plot with film mulching; RPHM, ridge planting with half mulch; RPFM, ridge planting with full mulchBack to article page