02087naa a2200325 a 450000100080000000500110000800800410001910000140006024501210007426000090019552011480020465000150135265000150136765000110138265000270139365000190142065000150143965000230145465000120147765000210148965000120151065000210152265000300154365300210157365300140159465300260160870000170163470000200165177300900167115523492026-06-17       1991    bl uuuu     u00u1 u    #d1 aCOUTO, W.  aResponse of andropogon grass to P fertilizers and lime in a dark-red latosol of the cerrados.h[electronic resource]  c1991  aThis study intended to determine (i) the amount of P required for the establishment of andropogon grass (Andropogon gayanus Kunth) in an acid soil; (ii) the effect of moderate amount of lime on the response to P; (iii) the relative efficiency of a low reactivity of rock phosphate (RP) and (iv) the effect of the rate of P applied at establishment on the response to annual refertilization rates. The effect of P applied at establishment, from two P sources and three annual refertilization rates were investigated at two lime levels in a virgin clayey Haplustox. Lime reduced the amount of P needed to produce 2000 kg/ha of forage dry matter yield from 180 to 78 P kg/ha-1. Forage yield obtained with a rock phosphate RP improved on time reaching similar yield than with same level of P applied as triple superphosphate (TSP) in the fourth year. Initial P rates of 52 P kg/ha-1 applied as TSP were high enough when lime was also applied. Higher P rates improved first and second year productivity only. Check plots receiving 13 or 26 P kg/ha-1 annually produced more forage yield by the third year than plots receiving highest initial P rate.  aAcid soils  aAndropogon  aLiming  aPhosphorus fertilizers  aRock phosphate  aAdubação  aAndropogon Gayanus  aCalagem  aCapim Andropogon  aCerrado  aFosfato de Rocha  aLatossolo Vermelho Escuro  aDark-red latosol  aFerrasols  aPhosphate fertilizers1 aLEITE, G. G.1 aSANZONOWICZ, C.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 26, n. 3, p. 297-304, mar. 1991.