Their goal: crops that limit the use of pesticides and fertilizers while delivering more food per acre planted.
We already handled far more than our share, and had less than one tree per acre.
But wheat yields per acre grew worse if anything as soil nutrients were depleted.
The reason is that corn is over 3X as productive per acre as soy.
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Crop production is consistently setting records for overall yield and yield per acre.
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In a busy cicada area, it's estimated there are one-and-a-half million cicada nymphs per acre.
This projected yield has been pushed down to 146 bushels per acre as of mid-July.
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Last year, for example, he produced 35 bushels per acre, far below the 150 bushel goal.
In Iowa alone, agricultural ranches saw a 16% uptick in the average value per acre last year.
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Upping the sugar content in the cane would lead to a higher yield of ethanol per acre.
Still, the asking price is 30% less per acre than neighboring ranches sold in the past five years.
For example, rice yield per acre on average is 1.3 tons versus 2.5 tons per acre in China.
Scientists developed new seed varieties and fertilizers that produced more food per acre.
Doing so, say scientists, will prevent the release of up to four tonnes of the gas per acre every year.
Halfway through this year, the ratio was just 1.6 ounces per acre.
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Importantly, higher crop production is resulting from higher yields per acre rather than merely an increase in land dedicated to crop production.
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Niman's cattle graze on high grass for at least 14 months and then spend 5 months at low-density (83 cattle per acre) feedlots.
Mr Ranson says that relative to the bullion price, American farmland has cost around 2.4 ounces of gold per acre on average since 1919.
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In addition to increased yields of beef per acre, the Grasslands model also creates an opportunity to commoditize sequestered carbon for carbon credit trading.
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It turned what was once a subsistence crop into a major income earner for women farmers, more than doubling average banana harvests to 20 tons per acre.
But it takes 3, 000 miles of irrigation and drainage canals, 34, 000 miles of tiled drains, and 1.8m gallons per acre to make the ground produce.
The MDA EarthSat crop tour estimated a corn yield of a 118 bushels per acre after surveying 49 fields in Iowa, Illinois, Indiana and Ohio.
Development is encroaching, and zoning laws allow one house per acre.
Also, the improvement in corn productivity led to per acre production of 91 bushels in 1980 to climb to almost 165 bushels per acre in 2009.
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Thus, even if per acre herbicide use had remained constant, the addition of new acreage alone would account for three-quarters of his claimed increase in herbicide application.
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Knowing what a field looked like, day by day, during a year when it produced 180 bushels per acre or 20% less than that, gives the software a reference point.
Global warming is (1) opening up more land for economically feasible crop production and (2) creating beneficial growing conditions that are increasing yields per acre on agricultural lands.
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In fact, its metropolitan population per acre puts it in the middle of the nation's largest areas, well behind not only Los Angeles and New York but also Houston and Dallas.
Mr Annan said there had been 30 years of silent hunger in Africa, where farmers exported food in the late 1960s but now only produced a quarter of the world average per acre.
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