Spatial Variability of Selected Chemical Characteristics of Paddy Soils in Sawah Sempadan, Selangor, Malaysia
A study was conducted to evaluate the spatial variability of selected soil chemical properties of paddy soils in the Barat Laut Paddy Project area in Selangor. A total of 138 geo-referenced soil samples were collected from the area at 0-20 cm depth after harvest, at an interval of 80-90 m to dete...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
Malaysian Society of Soil Science
2010
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/11324/ http://psasir.upm.edu.my/id/eprint/11324/1/Spatial_Variability_of_Selected_Chemical_Characteristics.pdf |
| _version_ | 1848841615864496128 |
|---|---|
| author | A. W., Aishah Darus, Siti Zauyah Abd Rahim, Anuar Ishak, Che Fauziah |
| author_facet | A. W., Aishah Darus, Siti Zauyah Abd Rahim, Anuar Ishak, Che Fauziah |
| author_sort | A. W., Aishah |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | A study was conducted to evaluate the spatial variability of selected soil chemical
properties of paddy soils in the Barat Laut Paddy Project area in Selangor. A
total of 138 geo-referenced soil samples were collected from the area at 0-20 cm
depth after harvest, at an interval of 80-90 m to determine the selected chemical
properties: pH, organic carbon, total nitrogen (N), available phosphorus (P) and
exchangeable potassium (K). Geostatistical analyses were applied to examine the
within-field spatial variability using semivariograms and kriged maps. Kriged
maps for each property were prepared using geostatistical software package based
on the results of spatial dependence. The effective ranges for the areas were about
6 km for pH, 1 km for organic carbon, 8 km for total N and available P and 9
km for exchangeable K, respectively. Kriged maps produced showed that most
of the area have pH values within the range of 4-4.5 (moderately acidic) and high
amount of organic carbon content (3-5%). The kriged maps also showed that a
large portion of the study area (66%) have high total N (0.30-0.40%), with low
amount of available P (< 40 mg kg-1) covering 70% of the total study area, while
most of the area have optimum content of exchangeable K (> 0.10 cmol(+) kg-1).
These results suggest the need for a site specific approach in managing paddy soils
particularly with regard to nutrient management. The results also suggested that
future soil sampling in these area can be carried out by increasing the sampling
interval depending on the soil properties, and appropriate management should be
applied according to the variations which exist. |
| first_indexed | 2025-11-15T07:46:04Z |
| format | Article |
| id | upm-11324 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T07:46:04Z |
| publishDate | 2010 |
| publisher | Malaysian Society of Soil Science |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-113242013-05-27T07:48:38Z http://psasir.upm.edu.my/id/eprint/11324/ Spatial Variability of Selected Chemical Characteristics of Paddy Soils in Sawah Sempadan, Selangor, Malaysia A. W., Aishah Darus, Siti Zauyah Abd Rahim, Anuar Ishak, Che Fauziah A study was conducted to evaluate the spatial variability of selected soil chemical properties of paddy soils in the Barat Laut Paddy Project area in Selangor. A total of 138 geo-referenced soil samples were collected from the area at 0-20 cm depth after harvest, at an interval of 80-90 m to determine the selected chemical properties: pH, organic carbon, total nitrogen (N), available phosphorus (P) and exchangeable potassium (K). Geostatistical analyses were applied to examine the within-field spatial variability using semivariograms and kriged maps. Kriged maps for each property were prepared using geostatistical software package based on the results of spatial dependence. The effective ranges for the areas were about 6 km for pH, 1 km for organic carbon, 8 km for total N and available P and 9 km for exchangeable K, respectively. Kriged maps produced showed that most of the area have pH values within the range of 4-4.5 (moderately acidic) and high amount of organic carbon content (3-5%). The kriged maps also showed that a large portion of the study area (66%) have high total N (0.30-0.40%), with low amount of available P (< 40 mg kg-1) covering 70% of the total study area, while most of the area have optimum content of exchangeable K (> 0.10 cmol(+) kg-1). These results suggest the need for a site specific approach in managing paddy soils particularly with regard to nutrient management. The results also suggested that future soil sampling in these area can be carried out by increasing the sampling interval depending on the soil properties, and appropriate management should be applied according to the variations which exist. Malaysian Society of Soil Science 2010 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/11324/1/Spatial_Variability_of_Selected_Chemical_Characteristics.pdf A. W., Aishah and Darus, Siti Zauyah and Abd Rahim, Anuar and Ishak, Che Fauziah (2010) Spatial Variability of Selected Chemical Characteristics of Paddy Soils in Sawah Sempadan, Selangor, Malaysia. Malaysian Journal of Soil Science, 14. pp. 27-39. ISSN 1394-7990 English |
| spellingShingle | A. W., Aishah Darus, Siti Zauyah Abd Rahim, Anuar Ishak, Che Fauziah Spatial Variability of Selected Chemical Characteristics of Paddy Soils in Sawah Sempadan, Selangor, Malaysia |
| title | Spatial Variability of Selected Chemical Characteristics of
Paddy Soils in Sawah Sempadan, Selangor, Malaysia |
| title_full | Spatial Variability of Selected Chemical Characteristics of
Paddy Soils in Sawah Sempadan, Selangor, Malaysia |
| title_fullStr | Spatial Variability of Selected Chemical Characteristics of
Paddy Soils in Sawah Sempadan, Selangor, Malaysia |
| title_full_unstemmed | Spatial Variability of Selected Chemical Characteristics of
Paddy Soils in Sawah Sempadan, Selangor, Malaysia |
| title_short | Spatial Variability of Selected Chemical Characteristics of
Paddy Soils in Sawah Sempadan, Selangor, Malaysia |
| title_sort | spatial variability of selected chemical characteristics of
paddy soils in sawah sempadan, selangor, malaysia |
| url | http://psasir.upm.edu.my/id/eprint/11324/ http://psasir.upm.edu.my/id/eprint/11324/1/Spatial_Variability_of_Selected_Chemical_Characteristics.pdf |