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Application of Remote Sensing in Agricultural Research and Regional Productivity Assessment

Application of Remote Sensing in Agricultural Research and Regional Productivity Assessment. I. Ortiz-Monasterio and D. Lobell. Planting Date. 1999-2000 2001-2002 2002-2003. Planting Date. 30 Dec. 10 Nov. Wheat, 2001-2002. Outlier?. Planting Date Validation. 2001-2002. R 2 =76%.

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Application of Remote Sensing in Agricultural Research and Regional Productivity Assessment

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  1. Application of Remote Sensing in Agricultural Research and Regional Productivity Assessment I. Ortiz-Monasterio and D. Lobell

  2. Planting Date 1999-2000 2001-2002 2002-2003

  3. Planting Date 30 Dec 10 Nov Wheat, 2001-2002

  4. Outlier? Planting Date Validation 2001-2002 R2=76% y=1.12x –4.3 (no sig. Difference from 1:1) rms=5.6 days

  5. Planting Date Validation 2002-2003 R2 =0.85

  6. Recommended Planting Date Nov 15 Dec 15

  7. Average Yields 1999-2000 Recommended planting date Kg/ha x 10 -20% Dec 15 Nov 19

  8. Average Yields 2001-2002 Recommended planting date Kg/ha x 10 +2% -51% Nov 1 Nov 30 Dec 31

  9. Average Yields 2002-2003 Recommended planting date Kg/ha x 10 -8% +8% Nov 7 Nov 30 Dec 31

  10. 1999-2000 Planting Date Area %Area Yield Production -ha- -%- t/ha -tons- < Nov. 15 3,655 1.7 - - Nov.15 – Dec. 15 90,157 49.3 6.07 547,253 > Dec. 15 89,598 49.0 5.05 452,470 Total 182,979 999,723 Scenario Regional Production Actual 999,723 All in recommended PD 1,110,683 Production Gain 110,960 (11.0%) 110,960 tons x 1800 pesos = 199,728,000 pesos in lost revenue

  11. 2001-2002 Planting Date Area %Area Yield Production -ha- -%- t/ha -tons- < Nov. 15 10,672 6.1 2.95 31,482 Nov.15 – Dec. 15 129,830 74.8 5.97 775,085 > Dec. 15 43,750 25.2 6.11 267,313 Total 173,580 1,073,880 Scenario Regional Production Actual 1,073,880 All in recommended PD 1,099,980 Production Gain 26,104 (2.4%) 26,104 tons x 1800 pesos = 46,987,200 pesos in lost revenue

  12. 2002-2003 Planting Date Area %Area Yield Production -ha- -%- t/ha -tons- < Nov. 15 31,120 18.2 4.34 135,061 Nov.15 – Dec. 15 88,470 51.7 4.70 415,809 > Dec. 15 51,402 30.1 5.07 260,608 Total 170,992 811,478 Scenario Regional Production Actual 811,478 All in recommended PD 803,662 Production Gain - 7,816 -(0.9%) 7,816 tons x 1800 pesos = 14,068,800 pesos in saved revenue

  13. Summer Weeds on Wheat Yields in the following Winter 2001 & 2002

  14. Aug 7, 2001

  15. 2 x 2 km NDVI 0.5 Crops Weeds 0.1 Bare Soil 0.0

  16. NDVI 0.5 0.0 Aug 7, 2001

  17. 2001-2002 Kg/ha x 10 Wheat Yield Crops Weeds Bare Soil 0.5 0.1 NDVI

  18. 2002-2003 Kg/ha x 10 Wheat Yield Weeds Crops Bare Soil 0.5 0.1 NDVI

  19. Table 1. The effect of different land covers during the presiding summer on wheat yields (without perennial crops). Land Cover 2001-2002 2002-2003 Area Yield Area Yield -ha- -kg/ha- -ha- -kg/ha- Bare Soil 102,761 6567 99,780 5730 Soil Cover 82,627 5855 57,547 5086 Weeds 76,631 5694 51,195 5164 Crops 5,996 6065 6,352 4984 Total 185,388 157,327 Official Summer Crop Area 3,421 5,399

  20. Table 2. The effect of different land covers during the presiding summer on wheat yields (without perennial crops). Land Cover 2001-2002 2002-2003 Area Yield Area Yield -ha- -kg/ha- -ha- -kg/ha- Bare Soil 102,761 6567 99,780 5730 Weedy 76,631 5694 51,195 5164 Low Density Weeds 60,157 5867 37,557 5272 High Density Weeds 16,474 5585 13,638 5097 Crops 5,996 6065 6,352 4984 Total 185,388 157,327 Official Summer Crop Area 3,421 5,399

  21. Table 3. Scenario building with different summer managements on wheat yield for 2001-2002. Scenario Production Absolute Gain %Gain -tons- -tons- Actual 1,156,426 Weedy as follow 1,213,467 57,041 4.9% Weedy and crop as follow 1,217,442 61,016 5.2% 57,041 tons x 1800 pesos/ton = 102,673,800 pesos

  22. Results from 2001-2002 with 2002-2003 Prices Management Wheat Yield Prices (kg/ha) (pesos/ha) Bare Soil 6567 Weedy 5694 Yield Gain 873 1571 Cost of two disking 1000 Profit 571

  23. Table 4. Scenario building with different summer managements on wheat yield for 2002-2003. Scenario Production Absolute Gain %Gain -tons- -tons- Actual 860,945 Weedy as follow 896,588 35,643 4.1% Weedy and crop as follow 901,326 40,381 4.7% 35,643 tons x 1800 pesos/ton = 64,157,400 pesos

  24. Results from 2002-2003 with 2002-2003 Prices Management Wheat Yield Prices (kg/ha) (pesos/ha) Bare Soil 5730 Weedy 5086 Yield Gain 644 1159 Cost of two disking 1000 Profit 159

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