1) Which of the following types of soil is characterized as having the finest particles that hold greater amount of water? a) Clay b) Loam c) Rock d) Sand 2) What is the ideal type of soil for gardening? a) Clay b) Loam c) Sand d) A and B 3) Many plants cannot grow in sandy soil. Why is this true? a) Air cannot pass through sandy soil. b) Roots cannot easily push through sandy soil. c) Sandy soil has too many nutrients. d) Sandy soil does not hold enough water. 4) Which best describes humus? a) topmost layer of the soil b) forms part of the loam soil c) a mixture of decayed plants and animals d) a combination of any of the types of soil 5) Which of these is made up of smallest particles of rocks which contain decayed matter of plants and animals? a) Land b) Mineral c) Sand d) Soil

Recall

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？