Sources and methodology of data collection. –
Number of farms/area/production/value/yield –
Crop and livestock survey –
Integrated agricultural survey –
Rice and corn survey –
Census of agriculture –
1848 census of agriculture –
1960 census of agriculture –
1971 census of agriculture –
Prices –
Prices received by farmers –
Wholesale/retail prices –
Bureau of agricultural economics –
Central Bank of the Philippines –
Import/Export statistics –
Sources of information –
Bureau of customs –
Valuation –
Processing –
Per capita consumption estimates –
SSD-MA survey –
NEDA food balance sheet –
Agricultural production –
Production of miscellaneous process food products –
Foreign trade –
Available supply –
Allowances –
Per capita available food supply for consumption –
Farm wages survey. –
Gross value added for rootcrops. –
Other related statistics.

"This Data Series on Rootcrop Statistics, Philippines is PCARRD's fifth at- tempt to consolidate statistical figures on a commodity basis. The first publication which dealt on rice, was published in collaboration with the International Rice Research Institute. The other three publications were on coconut, sugarcane, and corn and sorghum.
Various agencies were tapped for this publication, among them the National Census and Statistics Office, the Bureau of Agricultural Economics, National Economic and Development Authority, Special Studies Division of the Ministry of Agriculture, and the Central Bank of the Philippines. Agency differences in statistics were reflected in the presentation. These figures could not be merged as they have been computed using different methodologies.
PCARRD hopes that with this series of publication, researchers, policy makers, program implementors and others will find the compiled data useful."
- Ramon V. Namage
RAMON V. VALMAYOR
Executive Director PCARRD