Crops News

National survey documents a wide range of cover crop benefits


Despite the crippling rainfall that significantly delayed planting across much of the country in 2019, more than 90 percent of farmers participating in a national cover crop survey reported that cover crops allowed them to plant earlier or at the same time as non-cover-cropped fields. Among those who had “planted green,” seeding cash crops into growing cover crops, 54 percent said the practice helped them plant earlier than on other fields.

Those findings were among several new insights from the 2019-2020 National Cover Crop Survey, conducted by the nonprofit Conservation Technology Information Center (CTIC), with financial support from SARE and the American Seed Trade Association. These organizations have worked together on several past national cover crop surveys, with the first survey dating back to the 2012 crop year.

The 2019-2020 survey, which included perspectives from 1,172 farmers representing every state, was the first by SARE, CTIC and ASTA to include detailed exploration of planting green — a tactic employed by 52% of the respondents — as well as crop insurance use among cover croppers and the impact of cover crops on the profitability of horticultural operations.

“Many U.S. farmers have turned to cover crops as part of their strategy to improve soil health while reducing input costs and maintaining yields,” stated Mike Smith, who managed the national survey for CTIC. Survey participants averaged 465 acres in cover crops in 2019, an increase of 38 percent in four years. The USDA Census of Agriculture found a 50 percent increase in cover crop acreage over the five-year period between 2012 and 2017.

“Farmers are using cover crops for a variety of reasons and many have tried new approaches to cover cropping,” Smith said. “This year’s survey also indicated that some of the concerns that many growers have had about the effects of cover crops on planting dates in a wet year turned out not to be true — in fact, in many cases, cover crops helped farmers plant earlier in the very wet spring of 2019.”

According to Rob Myers, Regional Director of Extension Programs for North Central SARE, “many farmers are finding that cover crops improve the resiliency of their soil, and the longer they use cover crops, the greater the yield increases and cost savings that are reported by producers.”

Among the 1,172 farmers who provided responses in the 2019-2020 National Cover Crop Survey, 81% were commodity producers (corn, soybeans, wheat, cotton, etc.) and 19% categorized themselves as horticultural producers.

Here are some highlights from the survey. A full report is available free online.


The previous five national cover crop surveys sponsored by SARE, CTIC and ASTA have all reported yield boosts from cover crops, most notably in the drought year of 2012 when soybean yields were 11.6 percent improved following cover crops and corn yields were 9.6 percent better. In 2019, when wet early conditions prevailed across much of the corn and soybean regions, yield gains were more modest but still statistically significant. Following the use of cover crops, soybean yields improved 5 percent and corn yields increased 2 percent on average, while spring wheat yields improved 2.6 percent.

Saving on farming costs

Many farmers reported economic benefits from cover crop beyond just yield improvements. Of farmers growing corn, soybeans, spring wheat, or cotton, the following percent had savings on production costs with fertilizers and/or herbicides:

  • Soybeans — 41 percent saved on herbicide costs and 41% on fertilizer costs
  • Corn — 39 percent saved on herbicide costs and 49% on fertilizer costs
  • Spring wheat — 32 percent saved on herbicide costs and 43% on fertilizer costs
  • Cotton — 71 percent saved on herbicide costs and 53% on fertilizer costs

While cover crop seed purchase and planting do represent an extra cost for farmers, it was notable that most producers are finding ways to economize on cover crop seed costs. Whereas earlier surveys from 2012 and 2013 reported on a median cover crop seed cost of $25 per acre, most farmers reported paying less in 2019. Of the responding farmers, 16 percent were paying only $6-10 per acre for cover crop seed, 27 percent were paying $11-15 per acre, 20 percent were paying $16-20 per acre, and 14 percent were paying $21-25 per acre. Only about one-fourth were paying $26 or more per acre.

Planting green

Planting green refers to planting a cash crop like corn, soybeans or cotton into a still-living cover crop, then terminating it soon after with herbicides, a roller-crimper, or other methods. In this year’s survey, 52 percent of farmers planted green into cover crops on at least some of their fields. (In the 2016-2017 report, the most recent prior survey by SARE, CTIC and ASTA, 39 percent of the respondents had planted green.)

  • Of the farmers planting green, 71 percent reported better weed control
  • 68% reported better soil moisture management, particularly valuable in a wet spring

Horticulture producers also benefit

For the first time, the survey queried horticulture producers about how cover crops have impacted their profit. Of the 184 horticulture producers responding to that question, 35 percent reported a moderate increase in net profit (defined as an increase of 5 percent or more), and another 23 percent reported a minor increase in net profit (2-4 percent increase). Even after factoring in the purchase and planting cost of cover crops seed, only 4 percent observed a minor (2-4 percent) reduction in net profit, and none reported a moderate loss in net profit.

Available online

“While the first survey in 2012 showed the benefits of cover crops in a drought year, this year’s survey showed that cover crops helped farmers in wet weather as well, with many of them being able to plant in wet spring weather when conventional neighbors couldn’t. The survey showed farmers are figuring out how to make cover crops work for them economically, while using them as a tool to address challenging issues such as herbicide-resistant weeds,” Myers at SARE said. 

For the full survey report and many additional insights on farmer experiences with cover crops, visit their website

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