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Spatial Database on Soil Health in Gazipur District

Md. Shahjahan Kabir
SSO
Agricultural Statistics Division, BRRI Gazipur

DR. D.N.R. Poul
CSO and Head

Dr. Md. Abu Saleque
PSO
Soil Science Division, BRRI, Gazipur

Abstract/ Executive Summary:

Attribute data of different soil parameters in Thana Nirdeshika prepared by Soil Resources Development Institute (SRDI) were joined with the soil sampling points of Upazila Base map. Surface of the four soil parameters N, P, K and OM were constructed from Soil sampling points of Thana Nirdeshika using inverse distance weight (IDW) method of ArcView 3.2 Spatial Analyst with 12 nearest neighbor soil points and power of IDW function was 2. The shape file of soil parameter values of soil health project was superimposed on the surface of N, P, K and OM created using data of Thana Nirdeshika. The sampling points of thana Nirdeshika and Soil health project are included. Assigned by location operation of Geo processing module of ArcView was used to construct the pair of values of Thana Nirdeshika and Soil Health project for each soil parameter and this was done for all sampling points of Soil Health project. The result revealed that in Mirzapur, Kaultia, Eastern Bashan, Gazipur Paurasabha and some parts of northern Pubail Union, the organic matter content in the soil decreased over time by about 16.45% and P content increased by 67.46% both of which were significant at 1% level.

Keywords: Spatial database, Soil health, GPS, ArcView

Location: Gazipur Upazila

Start Date: 30-06-2001

End Date: 31-07-2002

Program Area: Socio-economic and Policy

Non-commodity: Database Management

Objectives:

To assess spatial soil health condition of selected locations in Gazipur Upazila.

Methodology:

BRRI Soil Science Division collected 150 soil samples from different locations of Gazipur District. The soils were analyzed and the values of different soil parameters were determined. The global positioning system (GPS) bearing of these sampling points were recorded and shape file was created with the sampling points. The attribute data of all soil properties were joined with the shape file. Pair-wise t-test was performed for equality of two sets of measures- one computed from the surface constructed with the values in Thana Nirdeshika and the other prepared by Soil Health project of BRRI Soil Science Division. For this study, only four soil parameters namely, total N, P, K, and organic manure (OM) were considered.

Source of Information: BRRI Annual Report 2002-2003

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 250000

Total Budget (Tk.) : 250000

Achievement/Findings:

The result revealed that in Mirzapur, Kaultia, Eastern Bashan, Gazipur Paurasabha and some parts of northern Pubail Union, the organic matter content in the soil decreased over time by about 16.45% and P content increased by 67.46% both of which were significant at 1% level. The difference between the values estimated by Soil Health Project and those reported in Thana Nirdeshika was very small and insignificant for other two parameters namely, N and K remained the same, which indicated that N and K content in the soil of study location did not change over time.

Knowledge Management: Report/Proceedings