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Home Magazine issues November 2025

Fertile Fertilizers

Nigel Palmer by Nigel Palmer
November 3, 2025
in November 2025
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Fertile Fertilizers

Figure 1 (Olivier Husson, et al., Plant Soil, 2021, 466:447) — Figure 1. Oxidizing activities like tilling, the use of chemical fertilizers, and -cides move healthy plant conditions up and to the right — toward conditions that support fungi, bacteria, viruses and insects.

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The plant-energy cost of synthetic fertilizers is large; fermented plant juices provide plant-available energy at low/no cost

Nigel Palmer

The energy responsible for the food we eat, the oxygen we breathe, the topsoil we plant in, and the fossil-fuel energy that runs our economy originates in plant leaves via photosynthesis. From leaves, this energy flows throughout the plant and into the soil, distributing needed resources to the entire plant-soil ecosystem. 

Energy flow disruptions alter conditions within the plant-soil ecosystem, allowing pathogens and insects to take hold. Natural and human interventions — drought, high radiation, extreme temperatures, fertilizers, “-cides,” plowing, harvest — all disrupt these energy flows. Plants expend considerable amounts of photosynthetic energy to counter these interventions and to maintain plant-friendly conditions in their leaves, stems, roots and soils. This most efficient system of energy distribution establishes the world we live in.

Figure 1 defines ranges of electric potential (Eh) and acidity (pH) where plant parts, bacteria, fungi and virus species, as well as insects, thrive. (For a deeper explanation of this chart, see my article in Acres U.S.A. from December 2024, “The Soil Electric.”) Notice that conditions that are optimal for healthy plants are not acceptable conditions for insects and pathogens. This is the science behind the notion that healthy plants will not succumb to insect or pathogen pressures. Pathogens and insects simply don’t exist at healthy plant conditions! This is one reason plants expend energy to maintain these conditions.

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Tags: Fermented plant juiceFertilizer
Nigel Palmer

Nigel Palmer

Nigel Palmer is a former aerospace engineer and is an instructor at the Institute of Sustainable Nutrition in Connecticut. He is the author of The Regenerative Grower’s Guide to Garden Amendments. Learn more, including complete analysis of farm-made mineral amendments at nigel-palmer.com.

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