Soil quality problem
soil using cultivated general country usually lack the rich
complete, low soil fertility structure. Of soil is poor, dense, do not absorb water
.The microorganisms in soil less because of the unsuitable. However, resulting from the use of
soil and crop continuously by the lack of improvement. And
maintenance farming industry. Unsuitable land use the wrong type
.As well as the source of the soil, such as sand, laterite, acid alkali saline soil, etc., lack of balance in the aspects of chemical properties. Physical and biological need updating
and find solutions to benefit the
.In use for cultivation. Next, following suggest you know to the earth
problem types. In which need to improve to re-use.
advantage. The survey of land development department found that the soil resources
.In the physical, or quality which were popular
1 following problems of low soil fertility and deteriorate. Reports from the survey and classification, soil of the land run in the province
.The country showed that soil is mainly low fertility, naturally
due to country is located in the tropics, the high temperature. And the rain!A lot of mineral dissolution, a parent material of the soil is fast
and with leaching minerals food plants out of the soil in high rate During the rainy season
.Drift with water flowing into the lower, to the river and into the sea. ในที่สุดจาก decay mineral rock in ball clay hill. Hard and fast this
.The soil in the mainly consists of clay minerals kaolinite night
k (Kaolinite), iron, and aluminum oxide (hydrous oxide. Clay) which mineral
clay. These play an important role in absorbing nutrients and to change the
.Positive charge low (low activity clay) the abundance of soil natural low 2
. Soil with special problems (problem soils). From the survey and mapping of land land
has found that certain kinds of soil with the physical properties and chemical
.An obstacle or limits for use in agriculture, especially the cultivation of plants need to be
development or improvement to increase capacity.
in the manufacture of the lands, soil with special problems that said this, when separated by
.The state of problems or limitations, so the following
2.1 acid sulfate soil or soil sulfur (Acid Sulphate Soils)
is the value of soil acidity. (pH) than 4.0 set, but I next
from soil surface down (SUD surface) and in the floor with a substance yellow straw
.Happen (jarosite) values of PH may low down to 3.5 or lower. If
cases, such as. This soil can not grow พืชอะไร up even, but the rice is often neglected.
A is empty, there are grass covered up that cannot grow rice or plant
.The other is due to there are steel and aluminum melt into
toxic per plant, and also makes the elements necessary for growth. Plant
some insoluble is beneficial to plants, especially
.Phosphorus would be crucified (fixation) and is in the form that is not beneficial to the plant, so
qualify. Soil is the special. To
improve and solve to benefit in the use of crop
.Acid sulfate soils or acid sulfur t said, found an area about 9.0 million hectares
or 2.81 percent of area country is found in the central plain in the south.
the eastern and southern coastal area found scattered in
.The area that water ever flood before
2.2 saline (saline and sodic soils) is a soil with salt
water soluble composition high and dangerous. On plants
grown, saline soil, found in the most Eastern
.Northeast area is about 17 million hectares, or percent of the whole country. 5.5 area
also found saline soil in coastal area (coastal.
saline soils) space combination approximately 3 million hectares, including with saline
.In the northeast area of the 20 million acres, saline soil. This
potential giving crop yield, planting low, some cannot grow crops
. Especially in saline soil, said in the Northeast
.The salt crust (salt crusts) appears on the ground surface during the dry season, which indicates that the part
saline soil salty seashore with use.
in salt production, planting fruit by lifting groove for example, coconut and
.Still the forest cover. Besides, some areas use
in aquaculture น้ำชายฝั่ง, such as oysters, shrimp, crab and fish, etc., 2.3
Sandy organized (sandy soils) found in enough break out!A 2 type is the sandy plain of space is the deep sand and sandy soil, layered with Dan capture, hardened by iron and Huo mus A
welding occur within the depth 2 meters, but most happen below the 1
.Meters from the surface soil on the 2 sandy this type has the abundant natural
low and have the ability to absorb water low. The sandy soil with Dan
solid when the water seep down to soak the trapped because
.Soil of Dan said water through the difficult cause of stagnant water, plants, roots
lack of air, plants grown abruptly growth
at the present time. Sandy soil, the potential in the production of low and limited to
.Select the type of plants to be grown, in particular, sandy soil. In the sector
northeast and North. During the dry season is dry, and in the range.
the delay in rainy season, will dry quickly, such as the same for sandy soil, found
.The coastal area has a higher moisture content and can be planted some fruit trees
yield at the fair or quite well in some areas. Especially grow
coconut. However, sandy soil management still is considered with the problem!Special need to rectify. For example the fertility, the
can in the WHC of soil and type selection of plants to be grown
2.4 soil mixed fast (skeletal. Soils) is a soil with nutrients laterite me (
.Or iron stone) rubble (rock fragment) gravel round (Cobble) and
rubble other happens in depth 50 cm from the skin surface soil and
in soil mixed with fast, is composed of gravel and rubble)
.With the 2 mm is more than 35 percent by volume
gravel layer. This stone will qualify for.
การแปล กรุณารอสักครู่..