【判断题】【消耗次数:1】
有效含水量是指凋萎系数与田间持水量之间的土壤含水量
正确
错误
参考答案:
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相关题目
【判断题】 最优含水量是指当含水量为某值时,压实干容重最大,此时相对应的含水量即为最优含水量。
①  正确
②  错误
【单选题】 对植物生长有效的土壤含水量范围对应的土壤水势范围为()
①  -3~-15bar
②  -3~-31bar
③  -1/3~-31bar
④  -1/3~-15bar
【单选题】 农田土壤毛管孔隙都充满水分时的含水量称为()
①  最大分子持水量
②  土壤饱和含水量
③  田间持水量
④  最大毛管持水量
【单选题】 木材的含水量用含水率表示,指( )。
①  木材所含水的质量占木材干燥质量的百分率
②  木材所含水的质量占木材总质量的百分率
③  木材所含水的体积占木材总体积的百分率
④  木材所含水的体积占木材干燥后体积的百分率
【简答题】 什么是最优含水量?
【单选题】 水分特征曲线pF值为4.2时的含水量是()
①  萎蔫含水量
②  最大吸湿量
③  最大分子持水量
④  田间持水量
【单选题】 发芽法浸渍度含水量应为
①  32%—35%
②  42%—45%
③  52%—55%
④  62%—65%
⑤  72%—75%
【单选题】 远安鹿苑茶树生长期要求土壤相对含水量为
①  30%-40%
②  40%-50%
③  50%-60%
④  70%-90%
【单选题】 含水量在()的土称为潮湿土。
①  <5%
②  5%-30%
③  30%-40%
④  40%-50%
【单选题】 一般药材的含水量为
①  5%~10%
②  10%~15%
③  7%~13%
④  25%~30%
随机题目
【单选题】 I received his mother’ s telephone call at eleven. _____ that he was badly hurt in an accident yesterday.
①  Then did I know
②  Only then I knew
③  Only then did I know
④  Only then knew I
【单选题】 The trade unions in this industry are ____ any reduction in wages.
①  objecting against
②  opposed to
③  reacted to
④  resisting against
【单选题】 Hurricanes are severe cyclones with winds over seventy five miles an hour ____ originate over tropical ocean waters.
①  which
②  who
③  where
④  how to
【单选题】 John’s score on the test is the highest in the class; he ____ last night.
①  must study
②  should have studied
③  must have studied
④  is sure to study
【单选题】 This is the hotel _______last month.
①  which they stayed
②  at that they stayed
③  where they stayed at
④  where they stayed
【单选题】 He doesn’ t spend much time____ his homework.
①  in
②  do
③  on
④  to do
【单选题】 People’s status in society is frequently ____ by how much they own.
①  measured
②  examined
③  tested
④  questioned
【单选题】 Jack is so ____ to his appearance that he never has his clothes pressed.
①  adverse
②  anonymous
③  indifferent
④  casual
【单选题】 It’s no good ____ him. He is always indifferent towards others’ matters.
①  to turn to
②  turning to
③  turn to
④  turned to
【单选题】 The child tiptoed(翘起脚尖走)quietly to the bird. _____ into the forest when he was about to catch it.
①  Flew it away
②  Away flew it
③  Away it flew
④  Flew away it