Why are soil colloids important in soils? Why are soil colloids important in soils? Soil colloids is a measure of the maximum water available for plants use after the water has drained from large pore spaces. As one of the shapes of an individual ped, soil colloids control rooting of plants. Soil colloids are an indication of soil moisture. The higher number of colloids, the greater the soil moisture is. Soil colloids have a neutralizing effect, increasing the overall alkalinity of soil and making them prime for certain agricultural crops. Without colloids, leaching will dissolve important chemicals from the soil, making them unavailable to plant.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.