人工肥力是土壤在人为耕作熟化过程中培育形成的肥力，是人类劳动的产物，是在自然肥力基础上发展形成的。
垄播改善了土壤肥力和结构，对减少流失、水的利用和除草剂的施用也有帮助，也方便了机械和人工除草。
Bed planting improves soil fertility and structure and helps reduce erosion, water usage, herbicide use and facilitates mechanical and manual weeding.
森林土壤肥力以维持和恢复自然肥力为主，人工施肥为输。
Forest soil fertility mainly relies on maintaining and resuming natural fertility and combines with artificially applying fertilizer.
结果表明，全氮、碱解氮和有机质是黄土丘陵区人工林土壤主要的肥力指标，其含量能更好地反映土壤肥力状况。
The results showed that total nitrogen, available nitrogen and organic matter were the main fertility indicators for soil fertility evaluation in the planted forest land on the Loess Plateau.
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