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The rapid growth of the North American greenhouse tomato industry has changed the longstanding dynamics of the fresh tomato industry. During the 1990s, Canada emerged as the largest North American producer of greenhouse tomatoes, a prominence it never attained in the fresh field tomato industry. The United States and Mexico have also become important greenhouse tomato producers, consistent with their long dominance in North American fresh field tomato production. Greenhouse tomatoes have changed the look of U.S. retail tomato sales, where they now account for 37 percent of the quantity sold of fresh tomatoes. While the primary U.S. fresh field tomato product, the mature green tomato, long dominated retail sales, its share has decreased significantly due to the growth of greenhouse tomatoes. The U.S. mature green tomato industry is now more dependent on the continuing growth of the foodservice market, which generally prefers its product. Keywords: Greenhouse tomatoes, field tomatoes, mature green tomatoes, United States, Canada, Mexico, market integration, product differentiation, seasonality in production.
The correct supply of water and nutrients is important in hydroponic growing systems in order to use water efﬁciently, avoid stress situations, and control production. The present study was conducted to evaluate two irrigation scheduling techniques for hydroponic tomato production in Navarra, northern Spain, related to the crop water requirements. The results show that although daily over-irrigation was applied (45.7% of drainage), 18% of the total yield (35 kg m−2 ) was affected by blossom-end rot problems, due to water stress suffered by the crop. Irrigation scheduling by time clock was not ﬂexible enough to satisfy the varying crop water requirements through the day and during the season. With constant irrigation intervals and volumes, water and fertilisers were wasted during the morning (excessive irrigation) whereas during the afternoon, the plants suffered water stress. Irrigation scheduling by radiation method at a level of 0.81 MJ m−2 , with some supplementary time clock irrigation applications during the hours of darkness (in order to keep the growing medium wet), appeared to be a good solution. Copyright 2003 John Wiley & Sons, Ltd.
Hydroponics means “water working.” Therefore, a true hydroponic culture is one that uses water only, with plant nutrients added in the correct concentrations and ratios for the plants grown. In most cases, hydroponic culture involves a substrate for the plant roots to grow in, and is consequently termed “soilless culture.” Hydroponics goes back as far as the famous hanging gardens of Babylon and the floating gardens of the Aztecs. From the early 1600s until the 1800s, “nutriculture” techniques were developed for the growing of plants in laboratories to study plant nutrition. Dr. William F. Gericke of the University of California coined the term “hydroponics” in the early 1930s, as he developed techniques to commer- cially produce crops without soil. His first practical application of hydroponics was during World War II in an effort to grow fresh vegetables on non-arable islands where troops were stationed. Installations were established on Ascension Island in the South Atlantic, Iwo Jima and Okinawa in the South Pacific, and later, on Wake Island and a 22-hectare (55-acre) project at Chofu, Japan after the war. The U.S. Army, with its own special hydroponics branch, grew over 8,000,000 pounds of fresh produce during 1952. Today, there are about 2500 acres of greenhouse hydroponic vegetables produced in Canada, and over 1500 acres in the U.S. Principal crops grown are tomatoes, cucumbers, peppers, eggplants and lettuce.
The Strategic Marketing Institute Working Paper The Market for Greenhouse-Grown Tomatoes Getachew Abate June 2006 P RODUCT C ENTER For Agriculture and Natural Resources Room 80 Agriculture Hall, Michigan State University, East Lansing, MI 48824 (517) 432-4608 Envisioning, exploring and empowering a profitable future for businesses and industries engaged in Michigan’s agricultural, food and natural resource systems. 1 Market Overview Greenhouse tomatoes include both soil-grown and hydroponic tomatoes. The U.S., Canada and Mexico are major producers of greenhouse tomatoes in North America. In 2003, total greenhouse production in the three countries has been estimated at 528,078 metric tons (Table 1). Canada accounted for about 42% of the total production, while the U.S. and Mexico accounted for 30% and 28% respectively. Mexico is leading in field tomato production, while Canada has the lowest field tomato production. Table 1: North America greenhouse and field tomato production (2003)* United States...
The 411 on Healthy Eating You’ve heard it countless times before – eat healthy. Want to know what all the hype is about? Science has proven that if you lose a small amount of weight by eating healthier and being physically active 30 minutes a day 5 days per week, you can prevent or delay type 2 diabetes. What exactly does “eat healthy” mean? Eating the same old bland tasting food day after day? Hardly. In the landmark Diabetes Prevention Program (DPP) study, participants achieved success by eating less fat and fewer calories and getting regular exercise. The National Diabetes Education Program, sponsored by the National Institutes of Health (NIH) and The Centers for Disease Control and Prevention (CDC), has developed educational materials for many audiences and in several languages as part of the Small Steps. Big Rewards Prevent type 2 Diabetes campaign. Although there are lots of diet choices and weight-loss plans available, taking small steps to reduce fat and caloric intake and becoming more physically active is most likely to lead to successful weight loss—and helps to keep the weight off as well. Here are some tips for eating healthier and getting you on the road to diabetes prevention:...
NOTES ON ALL GENERAL MOTORS HARNESS SYSTEMS We have done a great deal of research on General Motors wiring harnesses in order to provide you with the most authentic wiring systems possible. While doing this research, we had the opportunity to study original harness blueprints and specifications for some General Motors products. All of the data we examined specified that the wire was to have a natural cotton base color (a light tan) braided over the rubber insulation, with tracer colors woven in for wire identification. The tracer colors would consist of a single thread parallel tracer or two single thread crossing tracers, as specified on the harness blueprints. After the cotton braid was applied to the wire it was to be given a protective coating consisting of a heat, oil and water resistant varnish. This protective coating would color with age and cause the original wire to appear dark yellow, orange, or brown. All the wire we use for General Motors vehicles conforms to the original color codes as specified by the manufacturer. One note on our General Motors harness systems: At this time we cannot supply the original type GM twist connectors, the rear body plug, or the turn signal switch plug. We do provide substitute connectors...
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(1888 PressRelease) A new study indicates a higher risk associated with radon in Portland Oregon. It shows one in four Portland homes have radon levels above the recommended EPA action level.
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