1.   Grain yields at the Lenin Collective are higher than at any other farm in the region.

2.   China will remain largely self-sufficient in food production, relying on biotechnology to raise grain yields, Li said.

3.   Experiments have shown that bigger fields mean increased per capita grain yields and higher farm incomes, the report said.

4.   The grain yield also has been affected by bugs.

5.   The north and northwest regions are expecting an increase in grain yields, Chen said.

6.   But ministry officials said the limited amount of farm land and insufficient grain yields meant the scheme would not grow.