The experiment was conducted from December/2002 to April/2003, with the objective of evaluating the effects of different phosphate sources (Yoorin® magnesium thermophosphate, Simple Superphosphate + Triple Superphosphate, Gafsa natural phosphate, and control – no phosphate application) as a function of the evaluation months, on leaf area index (LAI), tiller weight (P) and number, percentage of total leaf an...