2 2.1 the spread of iron deficiency in the soil, nutrients,
capacity is spread in the most are as follows:
4.1) the spread of sand particles and sand powder (silt) capacity, nutrients, that is in this section will be in the form of a particle size larger than clay particles, may be a primary mineral or secondary. Most will be in the soil are young (young soil).2.) The amount of clay particles spread in capacity, nutrients, there is a close positive relationship with clay particles because the clay particles absorb the skin of the ion exchange process.Again, the fixed on the clay mineral, is not able to extract the juice out with solvents and is a component of the mineral clay directly, particularly in octahedral unit isomorphous substitution process.3) the spread of oxide or HiFi System to revile (Oxide of iron and Alumina, Matt bug because of sunflower, alumina and matt steel elements are most of the soilIt can be called that, as well as Quito for oxide (sesquioxide). In addition, steel and a bug of sunflower can be changed by the process. Carotinoid mansion and the traps more easily, there are opportunities in oxide hydroxide oxide square4) The spread Eagle in the object in the ground because the eagle is a terminal object in the ลลอยด์ land which has the ability to absorb high-ion capacity, so there is an opportunity, as well as nutrients, will be coming in this section (Assoc. Prof.faculty of agriculture, Faculty the earth science, 2544.)
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