Hydroponics is not a new process. A long ago as 1960, an English physician tried growing plants in water in a laboratory experiment. In 1800msome German researchers used the method to develop many formulas for plant nutrient solution which are still in use today. About a generation ago hydroponics moved out of the research laboratory into commercial use. In1936 a California physiologist, W.F. Gerick, published guidelines for hydroponics agriculture. One of the leading companies in this field of hydroponics is Hydroponics Incorporated of Glendale, Arizona. It operates about 200 greenhouses on a 48 hectare site. It produces more than 2,7 million kilograms of fruit and vegetables each year mostly tomatoes, but also cucumbers, lettuces and melons.
1. The main idea of paragraph 1 is….
a. hydroponics has developed since 1960
b. hydroponics is already used for commercial use
c. new techniques of growing plants have been developed
d. German researches have been involved in hydroponics
2. The topic of paragraph 2 is about….
a. hydroponics Incorporated of Glendale
b. the quality of the incorporated product
c. the advantages of growing plants in water
d. various products of Hydroponics Incorporated in Glendale
3. The hydroponics farming in Arizona is more….than soil farming
a. suitable c. beneficial
b. effective d. adaptable
4. It is understood that since 1690 hydroponics systems had been
undergoing….for more than a generation
a. changes c. development
b. expansions d. improvements
5. About a generation ago hydroponics moved out of the research laboratory into commercial use (paragraph 1), Research means a detailed….
a. study c. exploration
b. analysis d. description
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