1.   Growing in the wild, plants related to our cultivated food crops provide new genetic strains.

2.   However, this technique was better accepted on poorer lands where food crops were less attractive relative to fuelwood.

3.   Many farmers stopped producing cocoa altogether or switched to food crops, like maize or cassava, that fetched more reliable prices.

4.   Rice was their basic food and their most important food crop, far ahead of maize, taro or sago.

5.   The demand for ethanol has reduced the amount of corn grown as a food crop.

6.   This trait can be engineered into food crops.

7.   In fact many food crops failed because of the drought.

n. + crop >>共 241
bumper 15.31%
corn 7.97%
wheat 6.99%
drug 6.11%
soybean 5.33%
food 5.23%
rice 3.91%
spring 3.08%
cotton 2.74%
year 2.69%
food + n. >>共 604
shortage 7.18%
aid 7.11%
supply 5.43%
price 3.88%
company 3.00%
product 2.59%
industry 2.07%
production 1.90%
safety 1.39%
store 1.32%
crop 0.73%
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