Predicting paddy soil productivity
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The Institution of Engineers, Malaysia
2011
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my.unimap-136492011-09-04T04:39:30Z Predicting paddy soil productivity Chan, C. S. M. S. M., Amin Lee, T. S. C. H., Mohammud Soil electrical conductivity Paddy soil productivity Veris machine Physical chemical properties of paddy soil Link to publisher's homepage at http://www.myiem.org.my/ Paddy soils are naturally heterogeneous in terms of their physico-chemical properties which affect rice productivity. Currently, uniform application of agricultural inputs on the entire field is not efficient and could result in either insufficient or excess nutrient supply. Good agricultural practices can be achieved if soil and nutrient variations within a farm are considered, and a soil-yield interrelationship is established. Thus, simple and rapid methods to characterize soil properties differences are needed. This study was conducted on two different plots in MARDI research station, Malaysia. The soils were sampled at two depths and analyzed for the physico-chemical properties. Crop cutting test yields were taken at the same soil sampling locations. Georeferenced ECa measurements were obtained by using Veris 3100 cart equipped with a differential global positioning system. The results of correlation analysis showed that the coefficients between yield and soil measurements were generally low and inconsistent for both 9-ha and subsurface drainage plots. On the contrary, when the two plots data were pooled and correlated, the coefficients between yield and soil measurements were high, consistent, and significant. A boundary line using a log-normal function was fitted to the upper edge of data in the scatter plots. Significant relationships between potential grain yield (Ypo) and ECa were detected with r2 > 0.8 in four out of six cropping seasons. Comparison of Ypo and observed yield (Yob) delineated farm areas into different management zone and allows for discriminate fertilizer application, thus avoiding under or overfertilisation. 2011-09-04T04:39:30Z 2011-09-04T04:39:30Z 2006-12 Article The Journal of the Institution of Engineers, Malaysia, vol. 67(4), 2006, pages 45-55 0126-513X http://www.myiem.org.my/content/iem_journal_2006-177.aspx http://hdl.handle.net/123456789/13649 en The Institution of Engineers, Malaysia |
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Universiti Malaysia Perlis |
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Malaysia |
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Universiti Malaysia Perlis |
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http://dspace.unimap.edu.my/ |
| language |
English |
| topic |
Soil electrical conductivity Paddy soil productivity Veris machine Physical chemical properties of paddy soil |
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Soil electrical conductivity Paddy soil productivity Veris machine Physical chemical properties of paddy soil Chan, C. S. M. S. M., Amin Lee, T. S. C. H., Mohammud Predicting paddy soil productivity |
| description |
Link to publisher's homepage at http://www.myiem.org.my/ |
| format |
Article |
| author |
Chan, C. S. M. S. M., Amin Lee, T. S. C. H., Mohammud |
| author_facet |
Chan, C. S. M. S. M., Amin Lee, T. S. C. H., Mohammud |
| author_sort |
Chan, C. S. |
| title |
Predicting paddy soil productivity |
| title_short |
Predicting paddy soil productivity |
| title_full |
Predicting paddy soil productivity |
| title_fullStr |
Predicting paddy soil productivity |
| title_full_unstemmed |
Predicting paddy soil productivity |
| title_sort |
predicting paddy soil productivity |
| publisher |
The Institution of Engineers, Malaysia |
| publishDate |
2011 |
| url |
http://dspace.unimap.edu.my/xmlui/handle/123456789/13649 |
| _version_ |
1643790922422419456 |