The study of Integrated Agricultural Production Systems (IAPS) has grown globally, particularly in areas under No-Tillage Systems (NTS), with technological distinctions between clayey and sandy soils. Within a broad concept of soil fertility, it is essential to consider the synergistic effects of pastures on crops and vice versa, resulting in changes in the soil’s physical, chemical, and biological attributes. These changes contribute to reducing production costs and improving the sustainability of integrated systems. This chapter addresses inconclusive aspects of soil fertility evaluation, fertilization recommendations, and related themes in integrated systems.