Doing so allows the roots to grow out into your soil. The first year is probably the most critical care time to rebuild the root system that was lost in the transplanting procedure. A new plant should be watered so the root ball as well as the soil around the ball is wet. Lincoln area soils are usually dense clay and retain water. Common sense should prevail when watering your plants.
Plants require less water when it is cool and more when it is hot.
A good soaking every 7-10 days during hotter weather is recommended. Weather conditions determine how much water you plants will use. Excessive water in the planting pocket can deprive the roots of oxygen and cause root loss. Staking of the tree is optional, but should be done if the plant is extremely tall. I don't recommend that you fertilize your plants at planting time.