The appropriate experiment method for researches on seed loss and displacement is probed through several rainfall simulation experiments on loess incline. Based on the conventional method of simulated rainfall experiment

the following aspects need to be stressed:(1) Seeds for experiment should represent the main species and different shapes in the study area. (2) Seeds should be placed on soil surface as seed loss mainly occurs on the soil surface. (3) Seeds need to be dyed to distinguish the original seeds in soil. (4) Seeds of each species should be placed in a definite location and misplaced among species in order to accurately measure the distance of seed movement. (5) The amount of seeds placed in experiment should not be too much because this way influences soil surface roughness. (6) It is better for the big seeds to be placed in the bottom of seed placement area to avoid its effect on runoff path.