| Soil losses due to root crops harvesting (SLCH) became an important problem for environment andsustainable development of agriculture in the world.SLCH means the magnitude of soil loss adhered tothe root crops and soil clods after harvesting and rarely return to the agricultural fields.The study ofSLCH launched recently in soil erosion investigation and significantly contributed to soil degradationunder mechanised agriculture. Most soil erosion investigations are focused on soil loss caused by water,wind or tillage. Therefore, harvest soil erosion has stimulated to investigate the importance of thisprocess of erosion under agricultural land as it was little known in the world. The goals of this studywere to assess SLCH for sweet potato grown on12experimental plots from four different fields in BaZhou city, Hebei province, North China and to determine the most significant factors that affect onSLCH and analyse the nutrients, total nitrogen (TN), available nitrogen (AN), available phosphorous(AP),available potassium (AK) and soil organic matter (SOM) losses on soil tare.In this study,harvesting is carried out by hand hoes on the experimental plots.The average soil loss through sweetpotato crop harvesting for the whole study was0.58Mg/ha/harvest and mean annual SLCH was0.4Mg/ha/yr. The variability of soil loss value per unit of crop mass, SLCHspec (Mg/Mg) for sweetpotato in this research could mainly be explained in the case of soil texture by sand%and clay%. Wecan concluded that the main factors controlling the variability of SLCH for sweet potato in this studyand in contrast to other studies was crop and agronomic practices. The average value of TN was17.4Mg/ha, AN was1.5Mg/ha, AP was0.1Mg/ha, AK was2.1Mg/ha and SOM was295.8Mg/hathrough crop harvesting (SLCHcrop) for this study and significantly lower than other study resultsunder the same harvesting method due to the SLCH determining factors such as soil, crop, andagronomic practices.
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