There is the worry that an increase in the use of food crops such as maize, cassava and sorghum is likely to increase the food price of most staple foods in Africa, notably corn.

人们担心对粮食作物如玉米、木薯和高粱不断利用可能会造成非洲主要粮食价格的不断上涨，特别是玉米。

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More potassium fertilizer application in a previous corn soil can notably improve tobacco quality, in-crease out put value and yield.

玉米茬烤烟增施钾肥，显著提高烟草中上等烟比例和产值，但对产量作用不明显。

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Insofar as renewables have desirable environmental attributes (and some notably corn-based ethanol may not), the preferable approach is to price these attributes and let the market choose the technologies that produce the best balance between environmental and non-environmental considerations.

WSJ: The Experts: What Renewable Energy Source Has the Most Promise?

Corn producers who already had irrigation systems and were using more advanced techniques, notably in the north of the country, have increased their production.

ECONOMIST: The problems of plugging a square economy into a round world