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再过十五年,人类将进入21世纪。到那时,美国的农业会是什么样? 在种植的作物方面是不会有多大变化的。但随着电脑应用、遗传改良、生长调节剂和农田灌溉诸方面技术的进展,美国的农业生产力将会有巨大的发展。依阿华州大学最近的研究表明,过去的50年中,通过遗传改良已经使农作物的产量每年每英亩提高了1.4蒲式耳。并且可以相信今后至少仍能保持这样的递增速度,尤其是在遗传工程和作物育种技术的综合影响下,
In another fifteen years, mankind will enter the 21st century. By that time, what will American agriculture be? And how much change will be made in the crops grown. But with advances in technology in computer applications, genetic improvement, growth regulators and farmland irrigation, there will be tremendous growth in agricultural productivity in the United States. Recent studies at Iowa State University show that over the past 50 years, crop yields have increased by 1.4 bushels per acre through genetic improvement. And we can believe that we can at least maintain such an increasing rate in the future, especially under the combined influence of genetic engineering and crop breeding technology,