Growing Returns

Selected tag(s): nitrous oxide

We can feed a growing population while shrinking fertilizer pollution. Here’s how.

By Alison Eagle / Bio / Published: December 18, 2024

Farmers must estimate how much fertilizer and other inputs their crop will need in the face of increased weather variability.

Nitrous oxide might not make the news like carbon dioxide, but it’s a powerful hidden force behind the extreme, climate-driven weather we’re experiencing. This super-pollutant is the third most significant greenhouse gas, with a warming impact almost 300 times greater than carbon dioxide. Lowering it is essential for avoiding the most dangerous climate impacts.

The newly released “Global Nitrous Oxide Assessment” confirms a sobering reality: atmospheric concentrations of the gas are rising faster than previously anticipated. The majority of nitrous oxide emissions come from synthetic fertilizer and manure. Yet nitrogen applications are also essential for producing the crops that feed a growing population.

We don’t have to choose between food security or climate stability. We can and must support farmers in achieving both priorities.

Reducing nitrous oxide emissions isn’t just possible — it’s within reach.

A combination of existing strategies could slash global nitrous oxide emissions by over 40%, but scaling these solutions requires commitment and innovation, but scaling these solutions requires commitment and innovation.

Posted in Agriculture / Also tagged environmental, farmers, global carbon emissions, global warming | Comments are closed

A breakthrough to measure agriculture’s environmental impact

By Shelby Shelton / Bio / Published: February 18, 2021

Nitrogen (N) is essential for high crop yields to feed a growing population, but excess nitrogen contributes to climate change as nitrous oxide and to water pollution as nitrate.

Historically, measuring nitrogen losses has been expensive and time consuming. Environmental Defense Fund’s N-Visible framework remedies that.

N-Visible provides an easy-to-use, scientifically robust way for farmers and their advisers to assess nitrogen losses from individual fields. It also allows food companies and policymakers who promote on-farm sustainability to measure progress toward improved environmental outcomes at regional scales.

An open-source implementation guide is now available for download. Here’s what it contains and how to use it. Read More »

Posted in Agriculture / Also tagged agriculture, environmental impact, farming, fertilizer, N Visible, nitrate, nitrogen, Nitrogen losses, water pollution, water quality | Comments are closed

How agriculture can help drive a low-carbon economy

By Robert Parkhurst / Bio / Twitter profile / Published: December 1, 2016

The White House Council on Environmental Quality (CEQ) recently released an intriguing report on how the United States can transition to a low-carbon economy by 2050 while continuing economic growth. The report gives a starring role in this job to agricultural lands.

“Mid-Century Strategy for Deep Decarbonization” outlines a 3-pronged strategy for reducing greenhouse gas emissions by 80 percent while accelerating job-creating innovation. Calling each strategy “critical,” CEQ first lists the familiar call to transition to renewable and low carbon forms of energy.

The second key strategy, however, is less often discussed: the potential of cropland and grassland soils, as well as forests, to store and sequester hundreds of millions of tons of CO₂ annually. The report – informed by decades of scientific research – describes the opportunities to explore in this area. Read More »

Posted in Agriculture / Also tagged American Carbon Registry, carbon sequestration, climate action reserve, conservation, cover crops, economic growth, farming, fertilizer optimization, grasslands, grasslands protocol, greenhouse gas emissions, livestock, market-based, no-till, ranching | Comments are closed

California’s new nitrogen assessment highlights promising solutions for reducing fertilizer losses

By Sara Kroopf / Bio / Twitter profile / Published: August 23, 2016

Sara Kroopf A team of researchers spent seven years dissecting, analyzing and reporting on California’s nitrogen cycle, and the results are eye-opening.

Nearly 2 million tons of nitrogen are imported into the state each year. Almost a quarter of it is lost through leaching into groundwater – with runoff from cropland accounting for nearly 90 percent of this leaching. Excess nitrates in drinking water can cause health problems when consumed by at risk populations. Four percent of the state’s nitrogen is lost to the atmosphere as nitrous oxide, a potent greenhouse gas 300 times more potent than carbon dioxide.

But the California Nitrogen Assessment (CNA), released by UC Davis’ Agriculture Sustainability Institute, also provides a never before seen level of detail on nitrogen movement in the state. There’s no silver bullet for reducing environmental impacts while keeping growers profitable. Yet information is power and the more we know, the more we can tailor and prioritize solutions.

The UC Davis team investigated various political, social and economic ideas for reestablishing our state’s nitrogen balance. Two of the most promising solutions for California agriculture to address what the CNA calls “critical control points” include enhancing fertilizer efficiency and expanding carbon markets for agriculture. Read More »

Posted in Agriculture / Also tagged agriculture, Almond Board, almonds, california, California Air Resources Board, Carbon Offsets, climate change, crop advisors, environmental defense fund, farmers, farms, GHG mitigation, growers, nitrogen, SARE, UC Davis | Comments are closed

It’s official! Rice farmers now eligible for carbon offset payments

By Robert Parkhurst / Bio / Twitter profile / Published: June 25, 2015

Credit: Brian Baer Photography

The door is officially open for crop-based farmers to participate in carbon markets and earn new sources of revenue. The California Air Resources Board (ARB) just approved a new protocol for rice growers, representing the first ever carbon offset protocol for crop-base agriculture in a compliance market.

This means rice growers who implement conservation practices to reduce methane emissions can create and sell a greenhouse gas credit, commonly referred to as a “carbon credit.” Regulated California companies needing to reduce their emissions under California’s cap-and-trade program can now buy rice growers’ carbon credits.

The rice protocol milestone marks a new chapter for sustainable farming and shows the central role agriculture can play in solving the climate challenge.

ARB can now move forward in developing other agricultural offset protocols. The most interesting is a nutrient management protocol that would reward farmers who reduce nitrogen fertilizer losses to the air.

This “fertilizer protocol” has enormous potential for farmers and the environment – more than 400 million acres of cropland could be eligible for participation, and growers could contribute millions of tons of greenhouse gas reductions.

Here’s how the rice protocol works. Read More »

Posted in Agriculture / Also tagged agriculture, Air Resources Board, california, cap and trade, carbon offset, Carbon Offsets, climate change, conservation, credit, crops, data, drought, emissions, farming, growers, methane, protocol, rice, rice cultivation, water use | Comments are closed

New research helps farmers set targets for reducing emissions

By Eileen McLellan / Bio / Published: May 26, 2015

Credit: photos.com

The easiest way to tackle fertilizer pollution is to lower the amount of nitrogen applied to crops, thereby reducing nutrient losses into the air and water. The problem is, reducing fertilizer rates can also shrink crop yields, which means less income for farmers and less food on our plates.

So here’s the question: how can we slash nitrous oxide emissions from agriculture without sacrificing productivity?

To meet this challenge, scientists need to understand the relationship between “nitrogen surplus” (the amount of applied nitrogen fertilizer not taken up by the plant), “nutrient use efficiency” (the ratio of how much yield you get from each pound of fertilizer applied) and nitrous oxide emissions that contribute to climate change. The more nitrogen a plant absorbs, the less it releases into the air in the form of nitrous oxide and into the water where it can contribute to harmful algal blooms. Read More »

Posted in Agriculture / Also tagged agriculture, climate change, farmers, farms, GHG emissions, GHG mitigation, nitrogen surplus, nitrogen uptake, nutrient efficiency, tipping point | Comments are closed