The water that made the San Joaquin Valley an agricultural powerhouse also spelled its doom. Because most water contains salt, irrigating adds salt to soil over time.
The possibility of a win-win for farmers and the environment is a driving force for the soil health movement. It is a management philosophy centered around four simple principles: reduce or eliminate tillage, keep plant residues on the soil surface, keep living roots in the ground, and maximize diversity of plants and animals.
Agronomist Andrew McGuire looks at too opposite problems in managing soil and then lays out a few principles for staying away from two extremes.
While crop probiotics offer an ecologically friendly option for farmers looking to improve and protect their harvests, the Australian market is far from reliable.
Our research group was asked to evaluate commercial crop probiotics. Over a year of experimentation on a sugarcane farm, we tracked the supposedly beneficial bacteria and fungi of two Australian probiotics products from soil to crop.
DNA analysis didn’t detect changes in root-associated bacteria, but the composition of root-associated fungi changed.
There are certain requirements that agriculture must meet to produce food and to keep producing food. We should view them as a hierarchy, such that if the top requirement is not attained, the lower requirements do not mean much, but once the top requirement has been met, we can move to the next one, provided that how we do it does not threaten any of the requirements above it. Each component is required, but not sufficient; all of them are needed.
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