One acre of farmland used for crop production can produce 1,500 pounds of tomatoes.

一英亩的农田可以生产1500磅西红柿。

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But no matter how much we maximize crop yield per acre, the limiting factor for food production is land.

但是不管我们如何最大化粮食亩产量，最大的制约因素还是土地。

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Without extensive mechanization it is estimated that cotton requires about 150 man-hours per acre, a greater labor input than for any other major crop.

据估计，若无充分的机械化，种植1英亩棉花约需150个工时。这比种植其它任何主要农作物投入的劳力都多。

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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.

FORBES: Fortified By Global Warming, Crop Production Keeps Breaking Records

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.

MSN: Drought slashes Midwest corn crop

Crop production is consistently setting records for overall yield and yield per acre.

FORBES: Global Warmists Allergic To The Truth During Pollen Season