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Six to eight plants, forming a straight row, are pulled over to an angle of approximately 45¡ãoff vertical with a spring balance attached through a loop of string encircling the line of plants directly below the top. The force required to pull the plants over is read off the spring balance and is given in grams. Êǽ²ÈçºÎ²â¶¨Ö²ÎïµÄÓ²¶ÈµÄÒ»¶Î»°¡£ ¸ßÊÖÀ´·Òëһϣ¬Ê®·Ö¸Ðл£¡ |
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- É¢½ð: 5
- Ìû×Ó: 45
- ÔÚÏß: 21.8Сʱ
- ³æºÅ: 646782
- ×¢²á: 2008-11-05
- ÐÔ±ð: GG
- רҵ: ÓлúºÏ³É
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