the soil consists of organic matter

the soil consists of mangan (Mn)

the soil consists of Iron (Fe)

The soil is infertile

cat tumpah

because it consists of heavy metal

because of soil organic matter

because of anaerobic condition

hue>chroma>value

chroma>value>hue

value>hue>chroma

hue>value>chroma

silt

sand

clay

stone

type

class

weight

type

grade

class

type

class

density

type

class

volume

bermuda triangle

textural triangle

triangle textural

texture triangle

wet

clay

dry

moist

$$\pi\ \left(\frac{d}{2}\right)^{ }h$$  

$$\pi\left(d\right)^2h$$  

$$\left(\frac{\pi}{2^2}\right)h$$  

  $$\pi\left(\frac{d}{2^{ }}\right)^2h$$