In Sri Lanka, the common experiment is set up on two contrasting sites – a dry site at Mahailupallama (annual rainfall <1750 mm) and a wet site at Meewathura (annual rainfall >2500 mm). 

As well as the UK polyethylene and biodegradable films, we are using a local polyethylene film. There have been three sowings of maize (Zea mays) and two of chilli pepper (Capsicum sp.) at both sites.