Sam Knowlton Profile picture
Dec 12 6 tweets 2 min read Read on X
While industrial agriculture spent billions breeding corn varieties that require MORE fertilizer a little-known plant geneticist has done the opposite.

Dr. Walter Goldstein breeds corn varieties that literally feed themselves.

Here’s how his discoveries can reshape modern ag. Image
In studying corn genetics, Goldstein made a revelatory discovery – Modern corn had in large part lost its ability to partner with soil microbes.

But through careful breeding, he could bring this ancient ability back.
Goldstein developed corn varieties that could effectively form relationships with nitrogen fixing bacteria - an extreme anomaly for non-legume plants.

Some of these varieties get nearly half their nitrogen requirements this way. Image
But nitrogen fixing was just the beginning. Goldstein's corn varieties developed:

- Deeper root systems
- Better nutrient acquisition abilities
- Natural pest resistance
- Higher nutrient density
- Yields on par with conventional varieties

All without chemical inputs Image
Instead of lab based breeding, Goldstein utilizes participatory breeding.

He works directly with farmers to select traits that perform in real world conditions.

Target traits are: nitrogen efficiency, root architecture, nutrient density, soil microbe partnerships.
The implications of Goldstein’s work are nothing short of revolutionary.

If corn can feed itself through bacterial partnerships, our entire approach to agriculture might be based on a fundamental misunderstanding of plant nutrition.

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More from @samdknowlton

Dec 9
In 1935, a peculiar Austrian forester made a claim that seemed impossible:

He could make water flow uphill without any external power source.

Scientists called him a fraud.

The Nazi regime tried to weaponize his discoveries.

Today, modern physics is proving he was right about almost everything.

This is the story of Viktor Schauberger, the "Water Wizard" who saw what everyone else missed:Image
Schauberger spent countless nights observing trout in mountain streams. He noticed they could remain motionless in rapid currents and suddenly dart upstream with explosive speed.

This defied known physics. But he saw what others missed: natural vortices. Image
He discovered that water doesn't just flow linearly – it moves in spiral patterns. These vortices, far from being chaotic, were nature's way of energizing and structuring water.

Modern fluid dynamics has now confirmed this principle.
Read 10 tweets
Jan 5
Revered by some and unknown to many, breadfruit is one of the most promising yet underutilized perennial staple crops in the tropics

A single breadfruit tree can produce 500 pounds of nutritionally dense fruit seasonally for decades.

The case for a breadfruit resurgence: Image
Breadfruit is a species of tree in the Moraceae family, native to new New Guinea. It initially spread to Oceania and is now found throughout the tropics.

Known as 'Ulu, It is also one of the celebrated "canoe plants" brought to Hawaii by ancient Polynesians.
Upon arrival, breadfruit spread across the islands, becoming a staple that fed over 1 million pre-contact native Hawaiians

The kaluʻulu, (breadfruit belt) of South Kona spanned 10 square miles and yielded 33 million pounds of breadfruit annually in a diverse agroforestry system Image
Read 7 tweets
Nov 29, 2023
Each year, we lose 3–4 million hectares of tropical forest, 90% of which is attributed to agriculture.

Productive agriculture and healthy forest ecosystems are not mutually exclusive.

Take the example of Ernst Gotsch:
Image
Image
Ernst Gotsch is a Swiss-trained agronomist who settled in the northeast of Brazil after years of tropical agriculture research stints.

He started with 120 hectares of former farmland so degraded that the Ministry of Agriculture deemed it unsuitable for any type of farming. Image
Undaunted by the condition of his land, Ernst set out to establish a unique cacao farm.

Ernst leveraged ecological succession to accelerate the regeneration of the desiccated land. Image
Read 11 tweets
Nov 7, 2023
Modern farms rely heavily on plastic.

Irrigation materials, plastic mulches, row covers, etc., contribute to a steady stream of microplastic deposits in the soil.

Microplastics serve as a vector for transmitting pathogenic and antibiotic-resistant bacteria into the food system Image
Plastics effectively adsorb chemical substances. Chemicals like antimicrobial pesticides and heavy metals, which would otherwise move through the soil, stick to microplastics. Meanwhile, bacteria and other soil microbes preferentially colonize the surface of these microplastics. Image
When bacteria encounter the adsorbed chemicals in their new environment (the microplastic), they activate stress response genes that induce resistance to the chemical, often resulting in antimicrobial resistance.
Read 6 tweets
Jun 16, 2023
A single beaver pond holds an estimated 1.1 million gallons of water and recharges underlying aquifers with an even greater amount of water.

Upon European arrival to North America, as many as 65 million beaver dams strung together waterways and hydrated landscapes. Image
Beaver fur was prized by Europeans for its texture and used to make some of the finest hats known to the Western world.

This spawned the beaver fur trade that spread throughout North America in the 1500s and would eventually become one of the continent's main economic drivers.
By the 1900s, the beaver population was nearly extirpated – only 100,000 remained from the estimated 400 million pre-colonial beaver population.

As a result of the fur trade, the lower 48 states lost ~ 1 million acres of wetlands that were created and maintained by beavers. Image
Read 9 tweets
Apr 21, 2023
The Loess plateau was the cradle of the Chinese civilization and sustained vibrant agriculture for thousands of years.

By the 20th century, overgrazing, deforestation, and the ensuing cycle of drought and erosion reshaped this once-fertile land into a desolate dust bowl. Image
The Loess Plateau and its eponymous soil type consist of wind-deposited glacial dust rich in minerals and highly prone to erosion in the absence of plant cover.

This fertile region is believed to be the 2nd place on Earth where humans settled to practice agriculture Image
The Loess Plateau was the center of power and affluence for several dynasties.

During this period, China produced cultural, scientific, and artistic works that are among the greatest achievements of humanity.

But could the people of that time foresee the downfall of their land? Image
Read 10 tweets

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