Step 1: What land improvement means.
Land improvement is the work done on the land itself, like leveling the field, making drains, building terraces and fixing salty soil.
Step 2: What it gives you.
All this work makes the soil better for plant roots, water and air. In short, it creates a good setting for growing crops.
Step 3: Sort out the options.
Crop growing practices in option 2 are about how you manage the plant, not how you fix the land. So the best answer is favorable condition for crop production.
\[ \boxed{\text{Favorable condition for crop production}} \]