2017 journal article
Corn Yield and Grain Nutrient Uptake from 50 Years of Nitrogen and Phosphorus Fertilization
AGRONOMY JOURNAL, 109(1), 335–342.
dl.sciencesocieties.org (publisher PDF)
UN Sustainable Development Goal Categories
2. Zero Hunger
(Web of Science; OpenAlex)
13. Climate Action
(Web of Science)
15. Life on Land
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
Core Ideas Initiated in 1961, a 50‐yr field study quantified continuous irrigated corn response to annual N and P rates. Positive N–P interactions on grain yield and grain N/P concentrations were documented. Economic optimum N rate varied greatly over years, but averaged ∼175 kg N ha−1 (1992‐2010). Significantly greater apparent fertilizer N recovery in grain (∼45%) occurred with P fertilization compared to no P (∼20%). Long‐term field studies can be used to improve nutrient effects on productivity.