|CHAPTER V - AGRICULTURE , FORESTRY AND FISHERIES
|INDEX OF AGRICULTURAL PRODUCTION (VOLUME)
An Index of Agricultural Product ion is computed to provide a general measure of the yearly changes in the volume of Agricultural Production. The earlier index with 1934 - 38 as base was later revised using 1962 as base and the commodity coverage was also extended by including livestock products in the index. This index was further revised using 1977-79 as base. Finally it was revised using 2002 as the base year. Moreover divisions of vegetables, fruits and some major commodities were also included in order to prepare more suitable index.
Indices for (a) tea, rubber, coconut and paddy, (b) pulses, (c) other food crops, (d) vegetables, (e) fruits (f) livestock and livestock products (g) small export crops are computed separately by comparing production volume in 2002. The overall index combining Agricultural Crops and Livestock products provides an indicator of the volume of Agricultural Production. The revised series with 2002 as base year is available from the year 2003 onwards.
The present system of collecting paddy statistics has generally three aspects, namely (1) Statistics on area under paddy, (2) Average yield per unit area, (3) Statistics on paddy production. These statistics are collected in respect of the cultivation seasons of Maha and Yala for each cultivation year.
Statistics on area under paddy are collected each season on the basis of parcel wise complete enumeration, where in all the paddy parcels in the island are listed on the form P1, at village or tract level. For this purpose a “Parcel” is being defined as a plot of land set apart for the cultivation of paddy, cultivated singly or jointly by a person. It may be surrounded by cultivated paddy lands or highlands belonging to other people.
Statistics of paddy yield are compiled from Crop Estimation Surveys conducted on a sample basis. The sampling design adopted for the survey is a stratified three stage random sampling method with D.S. Divisions as strata and mode of irrigation namely; Major, Minor, Rainfed as sub-strata. From each stratum sample villages are select using simple random sampling method where the number of samples per stratum depends on the sown area. About 4,000 villages/tracts/ kandams are selected.
for each Maha Season and about 4000 villages/ tracts/ kandams are selected for Yala Season. In each selected village/ tract/ kandam two parcels are selected at random and each selected parcel a “Liyadde” (plot) is selected on the same basis to conduct the experiment. In each liyadde thus selected the standard experimental plot of size 16 1/2ft. x 16 1/2 ft. (5.03meters x 5.03 meters) is laid out at random. Then the experimental plot is harvested, the grain threshed, winnowed and the yield is recorded separately. From these results average yield per net acre harvested is estimated at district level and island level.
Information on cultivation details such as system of tenure, variety of seed, method of land preparation, method of sowing, method of weed control, use of fungicides and insecticides, application of fertilizer are collected through a sample survey conducted concurrently with the crop estimation survey on paddy. The sample used for estimation of cultivation details is about five times as large as the sample used in the crop survey and the sampling unit used here is the paddy parcel. Using the sample data and the estimated sown extents, the extents associated with the cultivation practices are estimated at district level.
The estimates of paddy production are obtained each season as a product of the net extent harvested and the average yield. The preparation of district wise correction factors to convert Gross area to Net paddy area was done using the results of an area survey conducted for this purpose. All Island correction factor of 85% used hitherto is being used only in respect of Colombo, Gampaha, Puttalam, Ratnapura and Badulla Districts where the area survey work is not completed as yet.
|COST OF PRODUCTION OF TEA, RUBBER AND COCONUT
Data for the computation of the cost of production of Tea, Rubber and Coconut are obtained from estates growing Tea, Rubber and Coconut using a mail questionnaire sent out from the Department once a year/ annually.
The cost of production relates to the cost per kilogram of manufactured tea. Questionnaires are sent to all the registered tea estates in the island.From the data thus collected the cost of production of a kilogram of made tea is estimated.
The cost of production per kilogram of manufactured rubber is computed at the all island level. Estates of 20 acres and more in extent in major rubber growing districts are considered for this calculation.
The major coconut growing districts are grouped in to 4 regions as follows:
The estates in each region are stratified into 4 size groups i.e.20 - 50 acres, 51 - 100 acres, 101 - 250 acres and over 250 acres. The cost of production of coconut is computed for the whole island.
|HIGHLAND CROPS AND LIVESTOCK STATISTICS
Statistics of highland crops are published collecting data related to Yala and Maha season and for Livestock statistics data are collected and published once a year. The data collection is carried out using HL Register.
Data collection is performed by Grama Niladari in North and Eastern provinces which in rest of the provinces by Agriculture Research and Production Assistants (ARPA).
|FOOD BALANCE SHEET
Food Balance Sheet (FBS) is a statement showing the detailed amount of food supply in a country within a certain period (1 year). The Food Balance Sheet includes information on the amount of food available, usage of these foods, food availability on per capita basis per year and availability of calories, proteins and fats per capita basis per day.
|ECONOMIC CENSUS 2013/14
|Data Collection of Agriculture Sector
Data Collection of Agriculture Sector
In this Census, decentralizes scanning was used and by analyzing these data the final report has been published.
|Cost of Production
|Food Balance Sheet