Although advances in agronomy, breeding, and biotechnology have dramatically increased corn grain yields, soil test values indicate that producers may not be supplying optimal nutrient levels. Moreover, many current nutrient recommendations, developed decades ago using outdated agronomic management practices and lower-yielding, non-transgenic hybrids, may need adjusting.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/-...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/-...