The same dual quantity declarations also are required on all domestically sold products. Measurement is an international language, and the metric quantity declaration version appears to be the international trade language. From 'The Grower', October 1997. The simple, straightforward, retractable roof system avoids cables, straps, eyelets, and special fabrics in favor of a sturdy frame-support system that uses standard greenhouse polyethylene film, the manufacturer says. It offers 40 percent more insulating ability than glass.
Growers can open the roof to any width, and can keep it closed during storms.
The roof can be controlled manually, automatically, or by computer. The first step in managing plant diseases is making an accurate diagnosis. However, sometimes this is more easily said than done. Tomatoes are unfortunately subject to diseases caused by a relatively large number of pathogens, and the control measures needed vary considerably. A diagnosis can sometimes be made on the basis of symptoms alone, although information about the cropping history, cultural conditions, and weather are also very important.