1.3.1. know the value of measuring pH of soil.1.3.2. know the sourness and salinity of the soil in each village.1.3.3 is information on care and condition of the soil, there is an abundance.
1.3.1 know the measurements of the pH of the soil 1.3.2 know the sour and salty soil in each village 1.3.3. The information in the care and condition of the soil is fertile.