| 单词 | gravel culture |
| 释义 | > as lemmasgravel culture gravel culture n. a hydroponic method of plant cultivation, using beds of gravel supplied with nutrient solutions. ΘΚΠ the world > food and drink > farming > gardening > [noun] > hydroponics aquaculture1887 sand culture1916 drip culture1923 aquaponics1937 hydroponics1937 gravel culture1940 ring culture1953 1936 Withrow & Biebel in Jrnl. Agric. Res. LIII. 697 Fine gravel..appears to be the most suitable for this type of culture.] 1940 A. Laurie Soilless Culture Simplified viii. 136 The advantage often claimed for sand or gravel culture—that of increased production—can easily be overstressed. 1942 A. Laurie & V. H. Ries Floriculture v. 104 If flat-bottomed concrete benches have already been built, they can be converted to gravel culture. 1966 New Scientist 23 June 784/3 Gravel culture may also open possibilities for basic food production in malnourished countries. < as lemmas |
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