Quantifying Nutrient Losses with Different Sediment Fractions Under Four Tillage Systems and Granitic Sandy Soils of Zimbabwe

摘要: In soil erosion studies too much emphasis has been placed on the weight of loss (t/ha), while real issue is not only about amount lost or area land degraded, but effect productivity land. Soil rated as one major threats sustainable management, research data impact properties and its crop yield grossly missing (Hudson, 1993), es‐ pecially in tropical Africa (Kaihura, et.al., 1998). While process somewhat better understood, resultant changes properties, decline eval‐ uating should be concern to researchers this region.