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คณะเกษตรศาสตร์ มหาวิทยาลัยเชียงใหม่

 

  ISSN: 0857-0841 (Print)
  ISSN: 2630-029X (Online)
 


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"Article Journal of Agriculture"
Volume 34 Issue 3 September 2018 , ISSN 0857-0841
Title. : Fertility Capability of Calcareous Soils in Thailand
Author : Panuwat Auppathumpanont, Natthapol Chittamart and Timtong Darunsontaya
Page : 411-423
index word : ข้อจำกัดทางเคมีของดิน(Soil chemical limitation) การประเมินความอุดมสมบูรณ์ของดิน(soil fertility evaluation) สมรรถนะความอุดมสมบูรณ์(fertility capability) ดินเนื้อปูน(calcareous soils)
Abstract:
Calcareous soil is an important soil resource for the production of cash crops in Thailand. Soil fertility capability classification system can indicate fertility status and important limitations of the soil to provide guidance for proper soil management. This study aims to analyze the soil properties and to classify the fertility capability of 5 representative calcareous soils in Lop Buri and Nakhon Sawan provinces. The study consists of describing morphology, soil physicochemical analyses based on standard methods, soil fertility evaluation, and classifying fertility capability of soils. The results showed that most of soils are clayey soil, alkaline, and having high cation exchangeable capacity, but low levels of available phosphorus and potassium, extractable zinc, and copper which were major fertility limitations of these soils. The evaluation of fertility levels of soils found that studied calcareous soils have a medium to high fertility level. Results of soil fertility capability classification revealed that calcareous soils have significant limitations e.g. highly swelling clay minerals (v), alkaline reaction (b), and low potassium reserve (k). Such alkaline reaction makes phosphorus and micronutrients especially zinc less soluble and unavailable to plant which is first priority for fertility management of Thai calcareous soils.
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