good soil for growing media

From the chemical and physical structure of a soil memilike differences far enough from the good and bad soil as the planting medium. 

if the chemical into the soil more haranya elemental content, whereas it tended to the physical soil texture and soil structure. 

if the physical properties of the soil is good that the system has a good drainage and aeration, drainage and aeration which is determined by the structure and texture of the soil. 

while the drainage system and aerasinya not good, plant roots will be difficult to develop. for example, is not good drainage such as clay, water will seep consequently difficult to form a puddle, if like that then too bad aeration in the soil, resulting in the roots is difficult to take the air, while the roots need air for growth n development, but it also can lead to rapid root rot, attacked by the disease. What other plants susceptible to soil borne diseases. and consequently if plant growth is what disease? 

instead of sand, the sand is too easy to get water, a big pori2nya also easily have resulted in evaporation. so that the media quickly dry, nutrient that is given to the plant very easily lost. so if not carried out an intensive watering and fertilizing, plant growth will be less good (except tanaman2 who did their habitats in sandy soil) 

while the chemical condition is good soil is soil that contains many nutrients, the higher the organic matter content, soil color will get darker. in addition, ground reaction occurs in the soil (acid / alkaline balance) is usually expressed in pH values. Soil pH determines whether unsur2 easily absorbed nutrients, a good pH was neutral, krn at neutral pH soluble nutrients hydrofoil. pH also influenced the development of micro-organisms. 

So bai poor soil as the planting medium that is your choice to want to start planting directly only