01992naa a2200277 a 450000100080000000500110000800800410001902200140006010000190007424501240009326000090021752012180022665000120144465000180145665000160147465000150149065000130150565000110151865000260152965000180155565000110157365000240158470000260160870000170163477300630165120134922022-07-06       2015    bl uuuu     u00u1 u    #d  a1983-21251 aFAGERIA, N. K.  aMicronutrients use efficiency in tropical cover crops as influenced by phosphorus fertilization.h[electronic resource]  c2015  aDeficiency of micronutrients is increasing in the recent years in cropping systems in many parts of the world and cover crops are important components of cropping systems. A greenhouse experiment was conducted to evaluate copper (Cu), iron (Fe), manganese (Mn) and zinc (Zn) use efficiency in 14 tropical leg-ume cover crops grown on an Oxisol. The P levels used were low (0 mg kg-1), medium (100 mg kg-1) and high (200 mg kg-1). The P X cover crops interactions were significant for Cu, Fe, Mn, and Zn use efficiency (tops dry weight/unit nutrient uptake). Hence, cover crop species varied in nutrient use efficiency with change in P levels. The micronutrient use efficiency was in the order of Cu &gt Zn &gt Mn &gt Fe. Higher Cu use efficiency was associated with lower uptake of this element, in the cover crop tops compared to other micronutrients. Similar-ly, lower efficiency of Fe and Mn was associated with their higher uptake in the tops of cover crops. Overall, Cu and Mn use efficiency was decreased when P level was raised from low to medium level and then it was constant. Iron use efficiency was increased with increasing P level but Zn use efficiency was constant with the addition of P fertilizer.  aCajanus  aGreen manures  aAdubo verde  aCrotalaria  aFósforo  aGuandu  aLeguminosa forrageira  aMicroelemento  aMucuna  aPlanta de cobertura1 aFERREIRA, E. P. de B.1 aKNUPP, A. M.  tRevista Caatingagv. 28, n. 1, p. 130-137, jan./mar. 2015.