Soil Fertility Capability Classification for Growing Cassava on Different Amount of Rainfall Areas in Northeast of Thailand Soil Fertility Capability Classification for Growing Cassava on Different Amount of Rainfall Areas in Northeast of Thailand
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บทคัดย่อ
Eight soils from cassava fields of Ubon Ratchathani and Nakhon Ratchasrima province were collected. The difference amount of rainfall in the eastern part
areas of the northeast of Thailand is higher than western part areas where cassava has been grown more intensively and for a longer period of time. Although the selected soils in this areas are classify into Typic Paleustults, the potential of soil for growing cassava might be difference. In the terms of cassava growing
and soil management practice which the period of cultivation is most important might be reflected to the recommendation subgroup of Paleustults soils. This
study aimed at investigating soil properties, fertility status and classifying the soils into FCC unit. Results revealed the soils selected were found on upper part of low terrace to middle terrace that the relief was nearly flat to undulating relief (1-6% slope). They had rather similarly well drained feature. They were slightly to extremely acid with pH ranging between 4.4-6.5. These soils contained similarly very low amounts of soil organic matter, total nitrogen and
sum bases whereas the contents of available phosphorus and potassium in the topsoil of some soils were high. CEC in the lower part of some soils was
higher than that in the topsoil while base saturation percentage being low to medium. The soils were classified almost as sandy at the Type level and loamy
in some top soils and the Substrata level in some soils. Modifiers were quite similar on strong dry season to limits year-round cropping, aluminum toxicity for most common crops, low nutrient capital reserve and high leaching potential. Interpretation of the current FCC units to indicate their suitability for growing cassava revealed only small differences in soil management schemes among the soils studied.
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สงวนสิทธิ์ โดย สถาบันการอาชีวศึกษาภาคตะวันออกเฉียงเหนือ 1
306 หมู่ 5 ถนนมิตรภาพ หนองคาย-อุดรธานี ตำบลโพธิ์ชัย อำเภอเมืองหนองคาย จังหวัดหนองคาย 43000
โทร 0-4241-1445,0-4241-1447
ISSN : 3027-6861 (print) ISSN : 3027-687X (online)
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