Contents & Foreword, Characterizing And ... - IRRI books

Table 1. Example of form used to collect ground information for the SARI project.LAND PREPARATION +WIND NO GROWTH STAGE RRAIN NO HOMOGENEITY OF FIELD 3PESTS/DISEASES NO PLANT ROW DIRECTION NWINTERCROPS NO SURFACE SHAPE OF FIELD –9.00INTERCROP NAME NA SURFACE SHAPE OF WATER –9.00LAND USE PADI STRUCTURE OF PLANT 1+4RICE VARIETY LOKAL SOIL MOISTURE 4UPLAND NO MAXIMUM PLANT HEIGHT 105.20IRRIGATED YES AV OF LEAVES PER PLANT 43.00RAINFED NO AV OF STEMS PER PLANT 29.00TIDAL/SWAMP NO AV LENGTH OF LEAVES 29.95SEEDED NO AV WIDTH OF LEAVES 1.39TRANSPLANTED YES AV NUMBER OF PANICLES 28.80DATE OF TRANSPLANTING 9-4-99 AV PLANT DENSITY 16.00YIELD –9.00 AV WATER LAYER –9.00FERTILIZER YES AV BIOMASS OF STEMS AND 136.20LEAVESFERTILIZER NAME UREA, SP36 AV WEIGHT OF PANICLES 108.00provincial level using daily data from the NOAA/AVHRR sensor. Integration of differentdata sources will lead to a reliable rice-forecasting system.For the SARI project, the acquisition of ERS images is accompanied by radardedicatedfield surveys, in which information about the field, crop(s), soil, hydrologicaland meteorological conditions, and other parameters is acquired to validate classificationresults from the ERS image series and to calibrate biomass estimates fromthe radar data. Table 1 gives an example for field parameters assessed.Stratified sampling of rice fields in Indonesia for suitable and less suitable riceareas is performed. This approach is not synchronized with the radar image acquisitions.Using aerial photos over 1 × 1-km areas and the actual situation in the field,plots with similar phenological stages or land-cover type are being digitized and storedin a GIS. Information from this stratified sampling survey is meant to give anotherindependent rice data source, and can be used to validate crop area from the remotesensingdata (Table 1).Some resultsThe classification results of the UPRICE project can be seen in Figure 6. The classificationaccuracy is 78% when comparing the results with the figures of the ProvincialBureau of Regional Statistics. The rice map indicates the rice-growing area dur-164 Verhoeven et al