Crop cover develops the microclimate inside the tunnel which create identical atmosphere for crop. Which reduce the temperature variation such resulting to uniformity in agriculture production also in such condition growth of the crop increase remarkable comparing to open field which gives early yield. The microclimate created by the veil optimizes the conditions for photosynthesis. Crops covered can mature 1-3 weeks earlier than an uncovered control. There are variations depending on the species, times and production techniques.
