01396nam a2200289 a 450000100080000000500110000800800410001910000210006024501370008126002360021852003470045465000250080165000200082665000100084665000290085665000160088565300110090170000320091270000180094470000180096270000200098070000240100070000170102470000240104170000230106570000180108820092262019-10-30       2014    bl uuuu     u00u1 u    #d1 aVILELA, V. A. A.  aPreliminary evaluation of coffee crops under different doses of nitrogen with a spad meter and leaf nitrogen.h[electronic resource]  aIn: WORLD FERTILIZER CONGRESS OF CIEC, 16., 2014, Rio de Janeiro. Technological innovation for a sustainable tropical agriculture: proceedings. Rio de Janeiro: International Scientific Centre of Fertilizers, 2014. p. 387-389.c2014  aAbstract: The objective of this study was to establish correlations among the total N and the SPAD read- ings in Coffea arabica leaves. This study is part of a project that aims to evaluate the agronomic and environmental efficiency of nitrate-based fertilizers compared to conventional nitrogen fertilizers used in the cultivation of coffee.  aNitrogen fertilizers  aAnálise foliar  aCafé  aFertilizante nitrogenado  aNitrogênio  aCoffee1 aAMARO, A. R. F. V. B. de L.1 aMORASI, I. M.1 aMURRER, M. K.1 aABREU, P. F. G.1 aMOLTOCARO, R. C. R.1 aMORICONI, W.1 aGONCALVES, J. R. P.1 aSILVA, L. C. F. da1 aPACKER, A. P.