Source: American Society of Agronomy

The American Society of Agronomy is hosting a series of online seminars about fertilizer this spring. The first seminar, Fertilizer Recommendations: Build and Maintain vs. Nutrient Sufficiency Approaches, will be Wednesday, Feb. 10 from 12 to 1 p.m. Central time.

In 2003, K-State began to offer farmers the option of using either the Build and Maintain, or the Nutrient Sufficiency system for making fertilizer recommendations. The logic was simply that both offered legitimate advantages and disadvantages to farmers, and only they would be in position to know which system might fit their particular farm situation best. Currently, about 80 percent of the farmers requesting recommendations from the K-State Soil Testing Lab use the traditional Great Plains style Nutrient Sufficiency recommendations. But 20 percent have shifted to the Build and Maintain System. This presentation will compare and contrast these two systems and some of their derivatives such as the Cation Saturation System.

Original press release.