Tillage results in__________

Correct option is A

Tillage is the agricultural preparation of soil by mechanical agitation, such as digging, stirring, and overturning. One of the effects of tillage is the decrease in soil bulk density.
Bulk density is a measure of the weight of soil in a given volume. When soil is tilled, it's loosened and aerated, which means the particles are less densely packed. The increased pore space allows for better penetration of water and air, which are essential for root growth and microbial activity. However, it's important to note that while initial tillage decreases bulk density, repeated tillage can lead to soil compaction deeper in the soil profile over time, which can increase bulk density.