HORTICULTURE

Detailed explanation-1: -An ideal soil for plant growth contains 50% pore space and 50% solids, with the pore space filled with equal parts air and water. This distribution rarely occurs because pore space varies with soil texture and soil management. For example, tilling increases pore space, while poor drainage and compaction reduce it.

Detailed explanation-2: -In the last phase, the solid phase comprises 50% of the total soil volume. This phase is mainly represented by inorganic and organic solid components that make up 45% and 5%, respectively, of soil volume.

Detailed explanation-3: -Ideal Soils So, the ideal soil (according to a textbook) contains 50% solids and 50% pore space. Furthermore, in the ideal soil, half of the pore space would be macropores (air filled) and half would be micropores (water filled) because the grass roots need both air and water to survive.