The fertilization treatments analyzed were: (a) conventional tillage (mouldboard plow + disk),
non-fertilized (CT0N); (b) no-till fertilized with 25 kg N as diammonium phosphate in a plot with a history of 5 years under NT,
with a soybean–wheat annual crop sequence (NT 25N); (c) no-till fertilized with 50 kg N as urea in a plot with a history of 5 years under NT,
with soybean–corn rotation and 1 year with soybean–wheat annual sequence (NT 50N);
(d) no-till with 140 kg N as urea and monoammonium phosphate in a plot with a history of 5 years under NT,
with a soybean–wheat annual sequence (NT 140N)