Abstract:
A thermoplastic film for controlling plant growth which has a total light transmittance to sunlight of less than 40% for light with a wavelength of 300 - 700 m Mu and a light transmittance greater than 60% for wavelengths above about 900 m Mu and preferably between 90 and 1,500 m Mu . The foil or film thickness may be 0.01 to 0.5 mm and the light transmittance characteristics thereof correspond to the following table:
Abstract:
A METHOD OF CONTROLLING PLANT GROWTH WHICH INVOLVES ENCLOSING THE GROWTH SITE IN A STRUCTURE HAVING A TRANSLUCENT COVERING OF SYNTHETIC-RESIN CONTAINING SURFACE-ACTIVE AGENTS TO REDUCE THE CONTACT ANGLE OF WATER DROPLETS FORMED THEREFROM VAPOR CONDENSATION LESS THAN 75* AND PREFERABLY LOWER THAN A CRITICAL L-VALUE WHEREIN L IS THE CONTACT ANGLE AND
N2 AND N1 BEING THE INDICES OF AIR AND WATER RESPECTIVELY.