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Why the World Stays Green

Posted by Andrew McGuire | November 16, 2021
The world is green with plants. The world also has thousands of species of plant-eating insects and other organisms. Why don’t all those insects eat…

Bet-Hedging with Cover Crop Mixtures

Posted by Andrew McGuire | September 28, 2021
What do weeds and gamblers in Las Vegas have in common? They both manage the risk of unpredictable outcomes through a strategy called bet-hedging. Could…

Buckwheat and Phosphorus

Posted by Andrew McGuire | September 13, 2021
I once grew buckwheat in town between our sidewalk and the street. It got a lot of looks from passersby and one lady even knocked…

Crop Diversity is Not the Cause

Posted by Andrew McGuire | July 19, 2021
I previously covered reasons why the results of many biodiversity studies do not apply to agriculture. Here, I want to emphasize a related issue: how…

Yield Benefits of Crop Rotation: Crop Diversity or Active Crop Time?

Posted by Andrew McGuire | April 15, 2021
Crop rotation is a time-proven practice. Compared to monocropping—the continuous production of the same crop year after year—growing two, three, or even more crops can…

Biodiversity, Healthy Soils, and their Combination in Regenerative Agriculture can Reduce but not Replace Fertilizer

Posted by Andrew McGuire | March 15, 2021
“Dependent on off-farm inputs…” Can it be otherwise? People inside and outside of science like to point to how nature needs no inputs, yet still…

Why Ecological Biodiversity Research Results Seldom Apply to Agriculture

Posted by Andrew McGuire | February 4, 2021
Ecologists, agroecologists, and regenerative agriculture advocates are promoting biodiversity to solve many of agriculture’s problems. They often base this on evidence of the benefits of…

Contrary Science; Cover Crop Mixtures, Monocultures, and Mechanisms

Posted by Andrew McGuire | August 18, 2020
Planting diverse cover crop mixtures will increase soil microbial diversity and achieve increased benefits over monocultures because of the synergistic interactions of the different plant…

MAXIMIZE and minimize; Two Principles for Managing Soil Health.

Posted by Andrew McGuire | June 18, 2020
Soil health management can be distilled to two principles: Maximize photosynthesis & minimize tillage. These are principles; they do not tell you what practices you…

Just-In-Time Soil Health

Posted by Andrew McGuire | April 1, 2020
How much is enough soil organic matter? “The more, the better” is often the assumed answer, or at least as much as the native soil…
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