Science Consultant
Guelph, Ontario, Canada
Joined March 2010
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A well-written paper demonstrating "the importance of integrating regionally-tailored fertilizer source and timing within the 4R Nutrient Stewardship framework ... and the potential of EENFs to mitigate N2O emissions" sciencedirect.com/science/ar…
For a global dataset on crop nutrient concentrations, see Ludemann, C.I., R. Hijbeek, M. Van Loon, T.S. Murrell, A. Dobermann, et al. 2022. Global data on crop nutrient concentration and harvest indices. : 41325939 bytes. doi: 10.5061/DRYAD.N2Z34TN0X.
We also found grain P concentration increased with increasing soil test P and with yield. Wider datasets support removal coefficients of 0.3, 0.35 and 0.4 lb P2O5 per bushel for states in the western, central and eastern parts of the Corn Belt.
Crop removal rate is indeed important, but variable. Research across US Northeast states reported P concentration in corn grain ranging from 2.2 to 5.4 g P per kg (DM basis) - equivalent to 0.24 to 0.58 lb of P2O5 per bushel.
acsess.onlinelibrary.wiley.c…
Crop removal rate is indeed important, but variable. Research across US Northeast states reported P concentration in corn grain ranging from 2.2 to 5.4 g P per kg (DM basis) - equivalent to 0.24 to 0.58 lb of P2O5 per bushel.
acsess.onlinelibrary.wiley.c…
Farmers like me, concerned about large inconsistencies in soil test measurements for P and K, might want to review this from the @ajmargenot team at U Illinois suggesting applications based on solely on removal rates.
farmdocdaily.illinois.edu/20…
A nice overview, and a brilliant set of classifications of the different plant nutrient elements!
Understanding the foundations of fertilizer recommendations sciencesocieties.org/publica…
Tom Bruulsema retweeted
I am proud to work in agriculture.
Higher yields saved land.
Higher yields fed billions.
How? Science.
→ Better seeds.
→ Better fertilisers.
→ Better farming techniques.
People who say “go back to nature” actually want “go back to hunger”.
Tom Bruulsema retweeted
No, the meeting did not go badly for Ukraine. It exposed in the most undeniable, unequivocal way possible the pro-Putin commitments of the president and vice president. That was information Americans and allies needed to have clear before them.
Tom Bruulsema retweeted
Il y a un agresseur : la Russie.
Il y a un peuple agressé : l'Ukraine.
Nous avons tous eu raison d'aider l'Ukraine et de sanctionner la Russie il y a trois ans et de continuer à le faire.
Nous, c’est les Américains, les Européens, Canadiens, Japonais et plusieurs autres.
Merci à tous ceux qui ont aidé et continuent. Et respect à ceux qui, depuis le début, se battent. Parce qu'ils se battent pour leur dignité, leur indépendance, pour leurs enfants et pour la sécurité de l'Europe.
Tom Bruulsema retweeted
Trump berates Zelensky, the leader of a democratic country courageously fighting Russian imperialism, while he allies himself with Putin, a dictator who started the bloodiest European war in 80 years.
Sorry, President Trump. We believe in democracy, not authoritarianism.
Tom Bruulsema retweeted
Dear Volodymyr @zelenskyyua, we stand with #Ukraine in good and in testing times. We must never confuse aggressor and victim in this terrible war. (FM)
Tom Bruulsema retweeted
I have covered presidential politics for 40 years. This was the most juvenile display by a President and Vice President I have ever seen. Other presidents treated their enemies with more respect. This is a low point and a dark day for the US.
Tom Bruulsema retweeted
🌱 Soil is much more than just dirt beneath our feet.
It is a living and breathing ecosystem that supports agriculture, biodiversity, water cycles and even our climate.
📹 Watch to learn why accurate soil and data information matters. 👇
#WorldSoilDay #SoilHealth #COP16Riyadh
Tom Bruulsema retweeted
Robert L. Mikkelsen delivering the distinguished Leo Walsh lecture to a standing room only audience in San Antonio. – at Downtown, San Antonio
I'm looking forward to talking about Fertilizer and Climate Mitigation at the ASA, CSSA, SSSA meetings in San Antonio, TX. Monday 11 November 8:45 am in Room 213A, Convention Center. Come join me! lnkd.in/e2AQgJKc
Nutrient Use Efficiency in Responsible Plant Nutrition linkedin.com/pulse/nutrient-…
Excellent progress! Losses of reactive forms of nitrogen from Canadian cropland decreased from 20% to 13% of total N inputs from 2001 to 2016--while crop nitrogen removal increased very substantially, even ignoring the drought years 2001 and 2002. sciencedirect.com/science/ar…
Tom Bruulsema retweeted
The 2024 Brian Chambers award is now open for entries - for early career researchers in crop nutrition all around the world, and not just in universities. Now in its 10th year, entry involves just a 1 page form, + a poster for finalists. Info & entry form: buff.ly/43TyMzn
Did you know that magnesium plays a special role in enhancing the quality of potatoes? Find out how... acsess.onlinelibrary.wiley.c…
