Born in France in 1903, Andr Voisin was both a biochemist and a farmer. He taught biochemistry at the National Veterinary School of France as well as at the Institute of Tropical Veterinary Medicine in Paris. But his greatest insights regarding soils and grass came to him in the hours he spent watching his own cows graze the pastures on his farm in Normandy. Although he made his living as a scientist, Voisin remained a farmer at heart, understanding that if the soils and grasses are managed with care, they will in turn take care of the animals who live on them; and if our domestic animals are healthy and well fed, then those who consume the animals and their products will also enjoy good health.

Healthy soil, according to Voisin, is more than a collection of minerals. In fact, he demonstrated that people who ate the products of heavy clay soils suffered numerous health problems, such as thyroid disease and cancer, in spite of the fact that the soils were rich in minerals. He pointed out that organic matter served as the catalyst for mineral absorption. Minerals must first be consumed by earthworms and microscopic life and excreted as humus before they can be easily taken up by grazing animals.


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In addition, balance is important. When basic fertilizers like potassium chloride and nitrate of calcium are applied to grassland, sulphur is omitted and there is a risk that after some years there will be a deficiency of sulphur. Over time, this will prevent plants from producing sufficient quantities of sulphur-containing animo acids and the health of the animals will suffer accordingly.

When there is a shortage of carotene in the pasture herbage, rates of human thyroid disease in that district are high. Animals convert carotenes into vitamin A which is one of the principle nutrients for thyroid health. Rates of goitre are high in regions characterized by clay soils, compared to regions where the soils are rich in organic matter.

Cancer in humans is also tied to soil health. In several fascinating chapters, Voisin delineates the role of copper in the soil. Deficiency results in a decrease of the enzyme catalase in healthy cells and a rise in catalase in cancerous cells.

In a recent post, I looked at the link between soil microbial health and gut microbial health and it inspired to go back and review a book published in 1959. In Soil, Grass, and Cancer: Health of Animals and Men is Linked to the Mineral Balance of the Soil, Andr Voisin described the importance of elements of the soil and their effects on plants, and ultimately, animal and human life. He saw the hidden danger in the gross oversimplification of fertilization practices that use harsh chemicals and ignore the delicate balance of trace minerals and nutrients in the soil. Voisin issues a call to stand up and acknowledge our responsibilities for public health and protective medicine to remove the causes of ill health, disease and, in particular, cancer.

If you are interested at all in the potential for mineralized soil to be the basis for health, I highly recommend this book. If you are interested in finding out more, email me at andrewharley@ascensionsoil.com.

This long-out-of-print classic showed that soil fertility was directly linked to human and animal disease. Almost a half-century ago, Andr Voisin had already grasped the importance of the subterranean world. He mapped the elements of the soil and their effects on plants, and ultimately, animal and human life as well. He saw the hidden danger in oversimplified fertilization practices and the use of toxic chemicals that ignore the delicate balance of trace minerals and nutrients in the soil.This is not, however, merely a persuasive testament to the link between soil, human and animal health. It is also essential reading for anyone committed to increasing both the quality and the profitability of their pastures. While grass and livestock farmers will benefit most from the wealth of information on rotation management and fertilization practices, there is much in this book for anyone who makes a living from the earth.

With a volume of meticulously researched information, Voisin issues a call to agricultural scientists, veterinarians, dietitians and intelligent farmers to stand up and acknowledge the responsibilities they bear in the matter of public health. He writes as well to the alarmed consumer of agricultural products, hoping to spread the knowledge of the possibilities of protective medicine part of a concerted attempt to remove the causes of ill health, disease and, in particular, cancer.

This is not, however, merely a persuasive testament to the link between soil, human and animal health. It is also essential reading for anyone committed to increasing both the quality and the profitability of their pastures. While grass and livestock farmers will benefit most from the wealth of information on rotation management and fertilization practices, there is much in this book for anyone who makes a living from the earth.

Voisin taught biochemistry at the National Veterinary School of France as well as at the Institute of Tropical Veterinary Medicine in Paris. A true farmer at heart, he understood that if the soils and grasses are managed with care, they will in turn take care of the animals who live on them. It is a small leap then to understand that if the animals are healthy and well cared-for, then those who consume the animals and their products will also be healthy.

Perhaps his best known work is Grass Productivity, first published in 1957, and the first in which he described his "rational" system of grassland management which, at its most basic, was rotational grazing based on defoliation by the animals in relation to the rate of growth on grasslands. Later works include: Soil, Grass & Cancer; Better Grassland Sward; and Grass Tetany.

Though he often provoked controversy with his ideas, his convincing arguments and comprehensive knowledge of the subject kept both believers and skeptics interested in his ideas. He consistently kept the farmers in mind, and as they applied his ideas to their grasslands, the truth of his theories was shown.

Some studies have linked pesticides, especially those containing arsenic, to increased cancer risk. This is more of a concern for agricultural workers, who have chronic exposure. But the average person is generally not exposed enough to see an impact, says Foxhall.

Another potential source of concern is herbicides. These products may contain the chemicals glyphosate or 2,4-D. The International Agency for Research on Cancer recently linked certain herbicides with increased cancer risk, but evidence is limited.

Fertilizers often contain nitrates that may find their way into drinking water. This is more common in agricultural areas and for those who use water from wells. But research is unclear on a link with cancer.

Voisin would derive great pleasure simply from observing his cattle graze the sward. He noticed differences between the action of a grazing cow versus mowing and feeding hay. Whereas a sward mown for hay is all cut at essentially the same time, a grazed pasture is only cut as fast as the herd is able to eat it. Likewise while a feedlot cow may eat as much as she wants without moving, a pastured cow must both walk to a desirable part of the pasture, and then shear the grass with her teeth one mouthful at a time.

Eventually Voisin developed his "four laws" of rational grazing; he argued that these principles were applicable universally, "whatever the soil conditions, climate, altitude, latitude or longitude."

Although Voisin's research is now considered one of the foundational works of the permaculture, holistic management and grass-fed beef movements, he remains relatively unknown in his home country. According to a socialist compatriot Grard Pestrinaux, he is a political paradox: "(Voisin) was not a man of the left, but a classic Gaullist right, and yet he is buried in the cemetery of the heroes of the Cuban Revolution!"[11]

Cell signaling molecules crucial for balancing inflammation and boosting T cell activity as well as the production of antibodies. These communication molecules have been identified as important molecules for treatment of cancer, pain, and various diseases

The team, which includes researchers from the University of Washington, demonstrated that over the course of three years, a genetically engineered switchgrass could break down RDX in plots of soil at a military range. This is the first time researchers have used a genetically engineered plant in the field to remove pollutants that are resistant to degradation, the team said.

After three years, the excess water coming off the plots with the engineered grass contained lower levels of RDX compared to the other two types of plots. In addition, the engineered plants had little or no RDX in their tissues compared to the wild-type plants, suggesting that these grasses were taking up and metabolizing this chemical.

Second Law: The total occupation period on one paddock should be sufficiently short for a grass sheared on the first day (or at the beginning) of occupation not to be cut again by the teeth of these animals before they leave the paddock.


Third Law: The animals with the greatest nutritional requirements must be helped to harvest the greatest quantity of grass of the best possible quality.


Fourth Law: If a cow is to give regular milk yields she must not stay any longer than three days on the same paddock. Yields will be at their maximum if the cow stays on one paddock for only one day. 006ab0faaa

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