Willow Spring, NC. Willow Spring is located close to the center of North Carolina. Willow Spring is between the Wake, Alamance, Harnett, Johnston county. On average, the public school district that covers Willow Spring is better than the state average in quality. The Willow Spring area code is 919.
The average U.S. soybean yield for 2014 is now estimated at the record level of 46.6 bushels per acre, which is an increase from the August USDA estimate of 45.4 bushels per acre.
In general, the soil pH should be maintained in the range of 6.5 to 7.0. Soybeans need a high level of fertility to produce a good yield. A 50-bushel-per-acre crop of soybeans will remove approximately 40 pounds of phosphate (P 2 O 5) and 80 pounds of potash (K 2 O). In addition, it uses about 200 pounds of nitrogen which is obtained from nodules on the roots and nitrogen residues in the soil.