Consider the following statements and choose the correct answer:<br>1. Average density of soil is 2.65 gms. per ml.<br>2. The spaces present between soil particles in a given volume of soil are called pore spaces<br>3. Porosity of the soil decreases with the increase in the percentage of organic matter in the soil<br>4. Macro-pore spaces have little water holding capacity and allow free movement of moisture and air in the soil under normal condition

Correct Answer: Only 1, 2 and 4 are true