Fork over the soil two or three weeks before sowing to encourage the weed seeds in the soil to germinate. They can then be hoed off before sowing crops. Remove the first flush of weeds.

Lead researcher Dr. Lim Chee Liew said the discovery helped scientists understand what every cell does during seed germination. "This will show us which cells we can manipulate to ensure seeds ...

Science presenter Jon Chase investigates the effect of temperature, water and oxygen on seed germination. He finds out that seeds germinate best in warm, moist and well oxygenated conditions.

In September, she'll go back and count the orchids' seed capsules, which are extremely hard to find. To find the orchids, the researchers used rough coordinates from land-management agencies.