1.   Such measures inevitably incur substantial costs which in turn increases the cost of crop production.

2.   The already hot, dry countries of the world tend to be the ones with poor crop production and troubled economies.

3.   The amount of new land available for crop production is extremely limited in almost every part of the world.

4.   The area is mostly unsuitable for crop production.

5.   There is a herbarium, as well as a laboratory concerned with scientific research and investigation into plants and crop production.

6.   We can free up meadows for crop production and we are already seeing rainforests stripped out for new farmland.

7.   Yet these earlier occupants would Marvel at the advances in crop production.

8.   Poor soil has constrained the level of crop production.

9.   How can it benefit crop production?