Frequent failure of nutrients to increase plant biomass supports the need for precision fertilization in agriculture

Oliver H. Carroll, Eric W. Seabloom, Elizabeth T. Borer, W. Stanley Harpole, Peter Wilfahrt, Carlos A. Arnillas, Jonathan D. Bakker, Dana M. Blumenthal, Elizabeth Boughton, Miguel N. Bugalho, Maria Caldeira, Malcolm M. Campbell, Jane Catford, Qingqing Chen, Christopher R. Dickman, Ian Donohue, Mary Ellyn DuPre, Anu Eskelinen, Catalina Estrada, Philip A. FayEvan D. G. Fraser, Nicole Hagenah, Yann Hautier, Erika Hersh-Green, Ingibjörg S. Jónsdóttir, Taku Kadoya, Kimberly Komatsu, Luciola Lannes, Maowei Liang, Harry Olde Venterink, Pablo Peri, Sally A. Power, Jodi N. Price, Zhengwei Ren, Anita C. Risch, Grégory Sonnier, G. F. Veen, Risto Virtanen, Glenda M. Wardle, Elizabeth F. Waring, George Wheeler, Laura Yahdjian, Andrew S. MacDougall

Research output: Contribution to journal/periodicalArticleScientificpeer-review

Abstract

Implementing precision fertilization to maximize crop yield while minimizing economic and environmental impacts has become critical for agriculture. Variability in biomass response to fertilization within fields, among regions, and over time creates simultaneous risks of under-yielding and overfertilization. We quantify factors determining fertilization responsiveness (i.e., biomass increases with fertilization) up to 15 years in 61 unfertilized rangelands on six continents. We demonstrate widespread multi-year variability in responsiveness, with fertilization increasing average yield by 43% but failing to improve biomass 26% of the time. All sites were responsive at least once, but only four of 61 responded in all plots and years. Modelled management scenarios highlighted that fertilizer cessation is likely to generate sizable economic savings but always reduces yield because of the difficulty in predicting when and where biomass will be unresponsive. This work reveals substantial scale-dependent variability in fertilization responsiveness globally, while clarifying the prospects and pitfalls of managing more spatially and temporally precise nutrient application.
Original languageEnglish
Article number14564
JournalScientific Reports
Volume15
DOIs
Publication statusPublished - 25 Apr 2025

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