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Table 17. Incidence of child labor (age group 10–15 years), Nyaungdon Township,1996.IrrigatedChild population Rainfed Lower Upper Deepwaterterrace terraceMalesTotal number 40 100 83 66Attending school 80% 65% 76% 85%Participating in economic activities 20% 35% 24% 15%FemalesTotal number 38 7474 73Attending school 66% 68% 60% 66%Participating in economic activities 34% 32% 40% 34%AllTotal number 78 174157 139Attending school 73% 66% 68% 75%Participating in economic activities 27% 34% 32% 25%Table 18. Average per capita employment in nonfarm activities (no. of days peryear), Nyaungdon Township, 1996.Nonfarm sourcesRainfedIrrigatedLandless Landowner Landless LandownerAgricultural labor 160 58 190 61Collection of fuel 57 90 166 –Animal husbandry 214270 45 100Fishing 86 – 75 51Industry 74 60 84 46Trading 113 33 116 58Transport 142 53 127 57Construction 79 47 95 31Personal service 154174 48 86Government employment 288 300 329 268Rental service – 191 106 70busy with works on their farms, nonfarm activities could be done only during the offseason.Wages and incomesTable 19 presents the composition of annual household income. Agricultural incomecontributed 51% to total household income while the remaining 49% came from offfarmsources. Income from agricultural labor, about $0.50 per man-day, contributed10% of the total income. Other agricultural income generated by households mostlycame from farming, home gardening, and raising small livestock in the backyard.428 Garcia et al
Table 19. Composition of household annual income (% of total income), NyaungdonTownship, 1996.SourcesRainfedIrrigatedLandless Landowner Landless LandownerAverageAgricultureFarm/garden 7 66 437 28Agricultural labor 11 3 1410 10Animal husbandry 6 3 1 1 3Fishing 6 – 9 4 5Forestry 7 2 9 – 5Total 37 7437 52 51NonagricultureIndustry 8 2 9 10 7Trading 143 1416 12Transport 15 1 9 4 7Construction 9 2 11 2 6Personal service 12 10 2 1 6Gov’t employment 5 46 4 5Rental service – 49 4 4Transfer – – 4– 1Total 63 26 64 41 49A majority of the income (64%) of the landless households was generated fromnonfarm activities. Trading, transport operation, personal service, and constructionlabor were the major sources of nonfarm income, with shares of about 9–15% each intotal income.On the other hand, a larger proportion (63%) of the total income generated bylandowner households came from agricultural activities. The higher income of theirrigated farm households compared to the rainfed households was attributed to theintensive rice cultivation in these villages. Income from agricultural labor contributeda higher percentage in the irrigated villages (10% vs 3%) because of the increasedopportunity for farm work brought about by the new rice-based productionsystems. Trading, transport operation, and personal service were also the major sourcesof nonfarm income for the farm households, which contributed 34% to total income.A higher share of nonfarm income in the farming households belonging to the irrigatedvillages (41% vs 26%) was observed, implying that family members were ableto engage in more high-paying off-farm activities since farm operators tended to hiremore agricultural laborers to do the farm tasks.Income distributionTo determine the pattern of income distribution in each village, the households wereranked with respect to per capita income and the corresponding income shares ofSocioeconomic and biophysical characterization of rainfed . . . 429
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The International Rice Research Ins
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Monitoring rainfed and irrigated ri
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ForewordRainfed rice areas are asso
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AcknowledgmentsIRRI is most gratefu
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2 Singh et al
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development, for example, provision
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subecosystems were recognized withi
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Table 3. Methods commonly used in e
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Table 4 continued.Scale of analysis
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Table 4 continued.Scale of analysis
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This included standard countrywide
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deepwater rice ecosystems. The rese
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Table 5 continued.Main MethodologyC
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Table 5 continued.Main MethodologyC
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Table 5 continued.Main Scale presen
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levels of involvement. For example,
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●●●ecosystem classifications
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Conclusionsclearly that they are di
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IRRI (International Rice Research I
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Widawsky DA, O’Toole JC. 1990. Pr
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Rice is the staple food crop for mo
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first working group to identify the
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TropicsSubtropicsTemperateSummer/wi
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ferred it for wide adoption by farm
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ing, remote sensing, and computing
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ice environments will be needed to
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Insects and diseasesInsects and dis
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The completeness of characterizatio
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Table 7. Levels and scales for agro
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Jamin JY, Andriesse W. 1993. Discus
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Tools and methodologiesfor biophysi
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Effect of climate, agrohydrology,an
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to water deficit because the crop
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for different periods of the year:
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depth scenarios (shallow, medium, a
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Water table depth (cm)500Shallow wa
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Simulated yield (kg ha -1 )6,0005,0
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Perception, understanding,and mappi
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and rice yield at regional or more
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SubareaSampling sites:GridTransectR
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was approximately 2,000 m with a to
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kg -1 in 50% of the topsoil and sub
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Table 3. Class medians were calcula
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Hard point dataClay, silt, sandHard
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A. Silt (%) B. 0.5 ccdfC. 0.2 ccdf
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In summary, the chosen geostatistic
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elated over slightly longer distanc
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Miura K. 1990. Genetic features of
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Rainfed lowland rice, growing with
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tively. In 1993, following dry till
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Rainfall (mm)Water table depth (cm)
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Saturated hydraulic conductivity (c
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in the uncompacted C0 plots (6.7 wk
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Clay classified≤ 2% 50 ha (2% but
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NotesAuthors’ addresses: D. Harnp
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target area of a breeding program.
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which is calculated from the estima
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hence grain yield. The three major
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ainfall data for each location. Mea
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such as 1980 and 1996, yield was hi
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Table 1 shows the results of the se
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Grain yield (t ha -1 )3UBN 19942103
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decreased with the use of old seedl
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The use of five genotypes with diff
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Mackill DJ, Coffman WR, Garrity DP.
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In rainfed agriculture, crop perfor
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GrainSite Year Code Group yield San
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Criteria considered for selecting r
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Table 1. Characteristics of the ref
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equired as the quality of the repro
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Cooper M, Rajatasereekul S, Immark
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144 Amien and Las
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As Indonesia’s staple food, rice
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Soil and climate of rainfed lowland
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isky when the crop is planted late.
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The decrease in harvested area only
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than in tidal swamp rice, for which
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Monitoring rainfed and irrigated ri
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and, indirectly, methane emission f
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Radar backscatter (dB)-7ERS windsca
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ERS SAR imageseries2. RSpreprocessi
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Fig. 6. Supervised classification o
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ConclusionsMonitoring of rice crops
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Characterizing soil phosphorusand p
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Table 1. Area and distribution of s
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Table 2. Lowland area (ha) classifi
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Fig. 1. Extractable soil P map (25%
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Characterizing soil phosphorus and
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Table 4. Recommendations for P appl
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Fig. 4. Extractable soil K map of t
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Fig. 5. Extractable soil K map of t
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● acidic pH (< 6)● low organic
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trials, K recommendations for uplan
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O’Brien DT, Blair G, Lefroy R. 19
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Planning and managing rice farmingt
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lowlands is submergence-prone. Ther
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situations and the allocation of re
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estimation of drought were determin
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Table 2. Effect of date of sowing,
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from October to February and a summ
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Table 3. Promising areas for ground
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1. There are possibilities of growi
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mmmm450350250150ASoil moisture useS
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Table 9. Yield a of preflood ahu (a
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Grain yield (t ha -1 )6Farmers’ l
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ReferencesIRRI (International Rice
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network (Sastry 1976). Temperature
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Temperature (°C) and solar radiati
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Table 1. Characterization of rainfa
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in eastern Uttar Pradesh under norm
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fluctuations/variations in rainfall
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the desirable rainfall period at 50
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The radiation values range from les
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not affect the growth and developme
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Agrohydrologic and drought riskanal
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Analytical procedureThe nature and
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late because of low rainfall at the
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Probability (%)10080604020Vegetativ
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15 August), which may happen twice
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texture), then once in two years (5
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Characterizing biotic stresses
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Characterizing biotic constraintsto
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included in these studies. Later st
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Average number of insects per sweep
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Table 2. Categorization of weed and
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Table 5. Properties of individual c
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ResultsRelations among pests and cr
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Start hereInterview farmers todocum
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Table 10. Information used to prior
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Interpreting the results of indepen
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level. Again, we augment our databa
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NotesAuthors’ address: Cambodia-I
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in soil nutritional status, especia
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flora. The range in elevation acros
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Table 1. Soil characteristics of th
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Table 3. Weed species recorded and
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Proportional abundance (log scale)%
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1.0Echi_colCype_iriMoll_penLind_spp
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+3.0Echi_cruMars_creEcli_albLept_ch
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indicates the need to deploy broad-
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ReferencesBangun P, Pane H, Jatmiko
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Socioeconomic characterization
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The role of characterizationin ex a
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ApproachThe following steps were ta
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PriceDS 0S 1P 0P 1dS 0S 1acbD0 Q 0Q
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Table 1. Ex ante assessment of rese
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Table 2 continued.Ranked byResearch
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Table 3. Research resource allocati
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NotesAuthors’ address: National C
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In addition to the unavailability o
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Socioeconomic constraintsFarm sizeF
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found that a higher rural labor sup
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Table 3. Rice area under HYVs from
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Rice varieties in farmers’ fields
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Table 9. Constraints for low adopti
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vehicle for realizing the untapped
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Parthasarathy G, Prasad DS. 1978. R
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Appendix. Agroclimatic zones of Bih
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such that losses are reduced during
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P = 0.5 R [a 2 C r2+ 2 a (1 - a) g
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and Itgaon, however, the plot-level
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espectively, to farmers’ income.
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Factors determining the adoption of
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mining whether or not modern variet
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irrigation schemes in the study are
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Using gender analysis in characteri
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lytical tool used to identify or di
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However, household members have cer
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Table 1. Village characteristics of
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taking care of dairy cattle. On the
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The biophysical environmentThe perf
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Table 3. Seasonal calendar and gend
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Table 4. Crops grown during the kha
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Table 7. Labor input (person-days h
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Table 8. Labor input (person-days h
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Table 10. Cost and returns of rice
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Gender roles in animal husbandryWhe
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farm activities, 25% in nonfarm act
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for rice but also for cash crops su
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Table 15. Access to agricultural in
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Hossain M. 1995. Recent development
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Agricultural commercializationand l
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Conceptual frameworkPopulation pres
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tional average of 18% 1 , and most
Page 370 and 371: The Dzao live in medium-altitude ar
Page 372 and 373: Table 1. Selected districts and com
Page 374 and 375: Table 2. General characteristics of
Page 376 and 377: markets for their food needs. With
Page 378 and 379: ther “extensification” in the u
Page 380 and 381: the productivity of lowland rice ca
Page 382 and 383: Boserup E. 1981. Population and tec
Page 384 and 385: Economics of intensive rainfed lowl
Page 386 and 387: Area (ha)50,00040,000Irrigated30,00
Page 388 and 389: The economic characterization and i
Page 390 and 391: Table 1. Rice varieties planted (19
Page 392 and 393: Table 4. Yield and input use of maj
Page 394 and 395: TFP, output and input indices200160
Page 396 and 397: Lynam JK, Herdt RW. 1989. Sense and
Page 398 and 399: 406 Garcia et al
Page 400 and 401: Increased rice production had alway
Page 402 and 403: Table 1. Total rice area, average y
Page 404 and 405: use of water by avoiding seedbed pr
Page 406 and 407: water often brought with it a varie
Page 408 and 409: Table 4. Distribution of farm house
Page 410 and 411: Soil types found in the villages we
Page 412 and 413: Table 10. Ownership of agricultural
Page 414 and 415: in a group) at the rate of $60 per
Page 416 and 417: Table 13. Pattern of loan use (% of
Page 418 and 419: Labor and employmentTable 16 presen
Page 422 and 423: Cumulative proportion of income1.04
Page 424 and 425: Table 21. Cost and return analysis
Page 426 and 427: Table 22. Estimated rice yield and
Page 428 and 429: were often burned for disease contr
Page 430 and 431: landless population reaching 50-60%
Page 432 and 433: Integration of biophysical andsocio
Page 434 and 435: opinion regarding what socioeconomi
Page 436 and 437: 1995-96 Rice production (t)TvRd6Rd1
Page 438 and 439: Farm-gate price of agricultural goo
Page 440 and 441: ming the distance of all line segme
Page 442 and 443: Description of the study areaWe com
Page 444 and 445: Table 1 continued.Variable Unit1994
Page 446 and 447: CambodiaFig. 4. Main transport rout
Page 448 and 449: Table 2. Accessibility indicators f
Page 450 and 451: ice and the model is applied to exp
Page 452 and 453: Table 3. Summary of estimates of la
Page 454 and 455: estimation of a system of multinomi
Page 456 and 457: The availability of low-saline irri
Page 458 and 459: Table 5. Simulation of effects of i
Page 460 and 461: NotesAuthors’ address: Social Sci
Page 462 and 463: that they synthesize fragmented agr
Page 464 and 465: Framework for exploratory and predi
Page 466 and 467: and quantify the spatial distributi
Page 468 and 469: Seventeen different agricultural pr
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self-sufficiency in rice production
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al warming since maintaining or cre
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eturns to purchased inputs due to u
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Francisco SR, Navarrete Jr. RL, Dim
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Wade L. 1998. Nutrient research on
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