Follow us on:

2020 Wade Improved soil biological health increases corn grain yield in Nitrogen fertilized systems

Nitrogenous fertilizers have nearly doubled global grain yields, but have also increased losses of
reactive N to the environment. Current public investments to improve soil health seek to balance
productivity and environmental considerations. However, data integrating soil biological health and crop N response to date is insufficient to reliably drive conservation policy and inform management.
Here we used multilevel structural equation modeling and N fertilizer rate trials to show that
biologically healthier soils produce greater corn yields per unit of fertilizer. We found the effect of soil biological health on corn yield was 18% the magnitude of N fertilization, Moreover, we found this effect was consistent for edaphic and climatic conditions representative of 52% of the rainfed acreage in the Corn Belt (as determined using technological extrapolation domains). While N fertilization also plays a role in building or maintaining soil biological health, soil biological health metrics offer limited a priori information on a site’s responsiveness to N fertilizer applications. Thus, increases in soil biological health can increase corn yields for a given unit of N fertilizer, but cannot completely replace mineral N fertilization in these systems. Our results illustrate the potential for gains in productivity through investment in soil biological health, independent of increases in mineral N fertilizer use.

Share this on:
UreaKnowHow is an independent group of nitrogen fertilizer specialists with an impressive number of years experience in designing, maintaining and operating nitrogen fertilizer plants.

Solution Providers offer their solutions to improve our member’s plants performance.