Blog
May 24, 2020

Optimizing crop nitrogen [1/2]: different schools of thought around the globe

Manal Elarab, PhD
Chief Operating Officer

Nitrogen applications usually target one or more of the following goals:

  • Optimise yield
  • Optimise profitability
  • Optimising produce quality e.g. grain, cotton

Different countries have different approaches that were shaped by the differences in their growing conditions (soil, rainfall), economies (availability of government subsidies), or environmental policies. Here is the summary from our experience interacting with customers on the ground as to how they think about nitrogen application.

  • USA: applying N fertilisers at a rate that is required for the plant to reach a yield goal, based on Stanford equation - an approach also known as “expected yield”, or “yield based”, developed in 2005-06 to maximise the return on nitrogen fertiliser cost across the corn belt.
  • Australia: qualitative approach, apply N fertilisers to targeting a certain protein content in grain crops or lint quality in cotton; yield-based calculations are also popular depending on the state.
  • NZ and EU: N applications are first and foremost influenced by environmental policies, encouraging manage crop nutrient cycle in a more sustainable way, influenced by environmental policies targeting N removal and restricting the application on farms, therefore growers are mindful of their NUE, applying N only where it makes a difference.
  • Latin America: soil sampling is the backbone of N recommendations including the addition of the remote sensing data to understand where to take the representative samples.
  • Smallholder farms in Asia and rest of world: variable rate machinery is largely inaccessible due to its high costs, and instead N applications are usually done manually, in a less structured way.
Agronomist from our Virtual Agronomy 101 Course voted on their goals for optimising nitrogen applications.

There is no right or wrong way to do variable rate nitrogen application - the diversity in approached shows that nutrient management practice needs to be relevant to local growing conditions as well as their economic realities. 


Continue reading:

Blog
November 29, 2022

Greenhushing: The Pitfalls of Avoiding Communication on Corporate Climate Action

South Pole’s 2022 Net Zero Survey highlighted a disturbing new trend among global businesses. We believe that the right technology can give companies the confidence they need to credibly measure and report on progress

Regrow
Team
Blog
November 18, 2022

Action-Planning for the Global Food Crisis

CEO Anastasia Volkova, PhD, contributed to a panel discussion at the 2022 Bloomberg New Economy Forum in Singapore.

Regrow
Team

Keep up with Regrow!

There is always a lot going on at Regrow and you are not going to want to miss a thing.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.