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Estimating Area and Production of Rice in Bangladesh

Manotosh Howlader
PSO
Agricultural Statistics Division, BRRI, Gazipur

Md. Shahjahan Kabir
SSO
Agricultural Statistics Division, BRRI, Gazipur

Abstract/ Executive Summary:

For estimating area and production of rice in Bangladesh, a detail block-wise record of area and the number of plots planted to rice crop in different seasons has to be made at every five-year interval.Three crop-cuts has to be made in three rice fields for each variety under each land type. A single circular cut where the plants falling inside the circumference of the circle are to be harvested for crop-cut in estimating transplanted as well as direct seeded rice yield and the radius of the circle should be 178.5 cm so that the cut area becomes 10 m² in order to easy conversion of the crop-cut yield to t/ha.There should be at least two crop-cuts in each plot to minimize the chance of over or under estimation of the rice yield.

Keywords: Area, Production, Crop-cut, DAE, BBS

Location: All districts of BAngladesh

Start Date: 01-07-2005

End Date: 30-06-2006

Program Area: Socio-economic and Policy

Non-commodity: Rice, Analysis and interpretations

Objectives:

To forecast rice yield through crop-cuts at farmers’ field
To compare the crop-cut methods followed by DAE, BBS and a modified procedure proposed by Agricultural Statistics Division to forecast the rice yield.
To formulate a protocol that provides reliable and unique estimates on area and production of rice in Bangladesh.

Methodology:

Crop-cut is a widely used and well accepted procedure for estimating rice yield. This yield is then multiplied by the area planted under rice cultivation to determine rice production of the country. In Bangladesh, crop-cut is used to estimate transplanted rice yield. Procedure followed by DAE, BBS and proposed method of crop-cuts will be compared through actual crop-cut taken in farmers' field based on precision and relative efficiency of the estimates. The reliable estimated yield will then be multiplied by the area planted under rice cultivation to determine rice production of the country. Department of Agricultural Extension (DAE) and Bangladesh Bureau of Statistics (BBS) as the public agencies provide estimate on area and production of rice but they use different methods of crop-cut. The estimates of these two agencies on area and production rice are different posing a question to the users on the reliability of the estimates. An attempt had been taken with the objective to formulate a protocol that provides reliable and unique estimates on area and production of rice. For each variety, DAE takes three cuts each of size 5-x-2m, one from good crop, one from intermediate crop and other from a bad crop in each Block. The crop condition (good, intermediate and bad) is judged by visual inspection of crop stand, which is very much subjective and is likely to vary from person to person. And for each variety, BBS takes The three adjusted weights are then added together that gives the dry weight of paddy for the circular area of radius and converted to t/ha that represents yield of the plot selected for crop-cut.

Source of Information: BRRI Annual Report 2006-07

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 250000

Total Budget (Tk.) : 250000

Achievement/Findings:

For estimating area and production of rice in Bangladesh, a detail block-wise record of area and the number of plots planted to rice crop in different seasons has to be made at every five-year interval.
Three crop-cuts has to be made in three rice fields for each variety under each land type
A single circular cut where the plants falling inside the circumference of the circle are to be harvested for crop-cut in estimating transplanted as well as direct seeded rice yield and the radius of the circle should be 178.5 cm so that the cut area becomes 10 m² in order to easy conversion of the crop-cut yield to t/ha.
There should be at least two crop-cuts in each plot to minimize the chance of over or under estimation of the rice yield.

Knowledge Management: Report/Proceedings