0906 Agricultural Development: What Comes After 'Modern Agriculture'?
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Norman Uphoff COHD, China Agriculture University, Beijing, China
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0906 Agricultural Development: What Comes After 'Modern Agriculture'?
- 1. Agricultural Development: What Comes After 'Modern Agriculture'? College of Humanities & Development CAU, Beijing, March 6, 2009 Norman Uphoff, CIIFAD
- 12. World Grain Production and Fertilizer Use, and Cumulative Increases by Decades Year Grain produc-tion ( mmt) Increase in production by decade Fertili-zer use (mmt) Increase in fertilizer use by decade 1950 631 -- 14 -- 1961 805 +174 (28%) 31 +17 (121%) 1969-71 1,116 +311 (39%) 68 +37 (113%) 1979-81 1,442 +326 (29%) 116 +48 (70%) 1989-91 1,732 +290 (20%) 140 +24 (21%) 1999-01 1,885 +153 (9%) 138 -2 (-1.4%)
- 14. MADAGASCAR: SRI field, traditional variety, 2003
- 15. Cambodian farmer in Takeo Province, with rice plant grown from single seed using SRI methods with traditional variety
- 16. Nepali farmer in Morang District, with SRI plant from single seed
- 17. Tribal farmer in Jharkhand state of India, with a ‘ rainfed’ SRI plant with 65 tillers (110-day variety)
- 18. SRI NON-SRI Punjabi farmer in India showing difference between rice plant phenotypes with SRI and non-SRI practices
- 19. Vietnamese farmer in D ông Trù village, Hanoi Province, holding up SRI & regular rice plants in front of their fields – after typhoon has passed
- 20. 47.9% 34.7% “ Non-Flooding Rice Farming Technology in Irrigated Paddy Field” Dr. Tao Longxing, China National Rice Research Institute, 2004
- 22. Conoweeder used in Sri Lanka
- 23. Rotary-hoe weeding of SRI rice paddies in Madagascar
- 24. Careful transplanting of single, young seedlings, widely spaced SRI CAN BE MECHANIZED: Costa Rican SRI with mechanized transplanting and harvesting -- 8 t/ha yield in first season
- 26. I ndonesian farmer in Lombok Province comparing rice plants
- 30. SWI wheat crop in Poland before going into winter dormancy
- 31. Finger millet in India: on right: local variety and traditional mgmt; center: improved variety with same mgmt; on left: improved variety with SRI mgmt
- 32. Reported yields of 125-235 t/ha compared with usual 65 t/ha SRI concepts and methods adapted to sugar cane (left) in Andhra Pradesh, India
- 33. Extensions of SRI to Other Crops: Uttarakhand / Himachal Pradesh, India Rajma (kidney beans) Manduwa (millet) Crop No. of Farmers Area (ha) Grain Yield (t/ha) % Incr. 2006 Conv. SRI Rajma 5 0.4 1.4 2.0 43 Manduwa 5 0.4 1.8 2.4 33 Wheat Resear-ch Farm 5.0 1.6 2.2 38 2007 Rajma 113 2.26 1.8 3.0 67 Manduwa 43 0.8 1.5 2.4 60 Wheat (Irrig.) 25 0.23 2.2 4.3 95 Wheat (Unirrig.) 25 0.09 1.6 2.6 63
- 35. IRAN: SRI roots and normal (flooded) roots: note difference in color as well as size
- 36. Cuba – Two plants of the same age (52 DAP) and same variety (VN 2084)
- 37. Regression relationship between N uptake and grain yield for SRI and conventional methods (Barison, 2003) – same relation for P and K
- 39. ‘ Ascending Migration of Endophytic Rhizobia, from Roots and Leaves, inside Rice Plants and Assessment of Benefits to Rice Growth Physiology’ Feng Chi et al., Applied and Envir. Microbiology , 71 (2005), 7271-7278 Rhizob-ium test strain Total plant root volume/ pot (cm 3 ) Shoot dry weight/ pot (g) Net photo-synthetic rate (μmol -2 s -1 ) Water utilization efficiency Area (cm 2 ) of flag leaf Grain yield/ pot (g) Ac-ORS571 210 ± 36 A 63 ± 2 A 16.42 ± 1.39 A 3.62 ± 0.17 BC 17.64 ± 4.94 ABC 86 ± 5 A SM-1021 180 ± 26 A 67 ± 5 A 14.99 ± 1.64 B 4.02 ± 0.19 AB 20.03 ± 3.92 A 86 ± 4 A SM-1002 168 ± 8 AB 52 ± 4 BC 13.70 ± 0.73 B 4.15 ± 0.32 A 19.58 ± 4.47 AB 61 ± 4 B R1-2370 175 ± 23 A 61 ± 8 AB 13.85 ± 0.38 B 3.36 ± 0.41 C 18.98 ± 4.49 AB 64 ± 9 B Mh-93 193 ± 16 A 67 ± 4 A 13.86 ± 0.76 B 3.18 ± 0.25 CD 16.79 ± 3.43 BC 77 ± 5 A Control 130 ± 10 B 47 ± 6 C 10.23 ± 1.03 C 2.77 ± 0.69 D 15.24 ± 4.0 C 51 ± 4 C
- 40. Economic Evaluation (US$/ha) Tamil Nadu Agric. Univ. (N=100) Conventional practices SRI practices Income from grain (Rs. 5.00 / kg) $ 659 $ 870 I ncome from straw (Rs. 0.25 / kg) $ 49 $ 63 Gross return $ 708 $ 933 - minus costs of cultivation - $ 466 - $ 414 Net return/ha $ 242 $ 519 Water saving -- 40-50%
- 41. Incidence of Diseases and Pests Average of trial data (8 provinces) from Vietnam National IPM Program, 2005-2006 * Insects/m 2 Spring season Summer season SRI Plots Farmer Plots Differ-ence SRI Plots Farmer Plots Differ-ence Sheath blight 6.7% 18.1% 63.0% 5.2% 19.8% 73.7% Leaf blight -- -- -- 8.6% 36.3% 76.5% Small leaf folder* 63.4* 107.7* 41.1% 61.8* 122.3* 49.5% Brown plant hopper* 542* 1,440* 62.4% 545* 3,214* 83.0% AVERAGE 55.5% 70.7%
- 42. Sri Lanka rice fields: same variety, same irrigation system, and same drought : standard methods (left), SRI (right)
- 45. THANK YOU E-mail address: [email_address] SRI home page: http://ciifad.cornell.edu/sri/
Notas do Editor
- Presentation prepared for seminar at Foundation for Advanced Studies on International Development, Tokyo, February 25, 2008
- This discussion of ‘post-modern agriculture’ is adapted from 2 nd Hugh Bunting Memorial Lecture given at the University of Reading, UK, for the Tropical Agriculture Association, June 4, 2007.
- Graph prepared by Uphoff for monograph by Louise Buck, David Lee, Thomas Gavin and himself on EcoAgriculture (CIIFAD, 2004; for SANREM CRSP). Sources are from Worldwatch Institute’s data archives.
- SRI was developed in Madagascar about 20 years ago as discussed in the next slide. This is a summary of the effects of changing the management of plants, soil, water and nutrients according to the insights brought together in SRI. The figures are based on over a dozen evaluations, including ones by IWMI, GTZ, Tamil Nadu Agricultural University, China Agricultural University, Nippon Koei and other institutions.
- SRI was developed in Madagascar about 20 years ago as discussed in the next slide. This is a summary of the effects of changing the management of plants, soil, water and nutrients according to the insights brought together in SRI. The figures are based on over a dozen evaluations, including ones by IWMI, GTZ, Tamil Nadu Agricultural University, China Agricultural University, Nippon Koei and other institutions.
- Also adapted from Buck et al. (2004).
- This field was harvested in March 2004 with representatives from the Department of Agriculture present to measure the yield. Picture provided by George Rakotondrabe, Landscape Development Interventions project, which has worked with Association Tefy Saina in spreading the use of SRI to reduce land pressures on the remaining rainforest areas. The Ministry of Agriculture technician who measured the yield reported this as 17 t/ha.
- Picture provided by Dr. Koma Yang Saing, director, Cambodian Center for the Study and Development of Agriculture (CEDAC), September 2004. Dr. Koma himself tried SRI methods in 1999, and once satisfied that they worked, got 28 farmers in 2000 to try them. From there the numbers have increased each year, to 400, then 2100, then 9100, then almost 17,000. Over 50,000 farmers are expecting to be using SRI in 2005. Ms. Sarim previously produced 2-3 t/ha on her field. In 2004, some parts of this field reached a yield of 11 t/ha, where the soil was most ‘biologized’ from SRI practices.
- Picture provided by Rajendra Uprety, District Agricultural Development Office, Morang District, Nepal. Again, this is a single SRI plant grown from a single seed.
- Picture sent by Prativa Sundaray, staff member with the NGO PRADAN which is introducing SRI in poor communities, especially tribal ones in Orissa, Jhakhand and West Bengal, even where there is no irrigation, adapting SRI concepts to rainfed conditions.
- Picture presented to show contrasting phenotypes with SRI and conventional methods.
- Figures from a paper presented by Dr. Tao to international rice conference organized by the China National Rice Research Institute for the International Year of Rice and World Food Day, held in Hangzhou, October 15-17, 2004. Dr. Tao has been doing research on SRI since 2001 to evaluate its effects in physiological terms.
- This is the most simple description of what SRI entails. Transplanting is not necessary since direct seeding, with the other SRI practices, also produces similarly good results. The principle of SRI is that if transplanting is done , very young seedling should be used, and there should be little or no trauma to the young plant roots. These are often ‘abused’ in transplanting process, being allowed to dry out (desiccate), or are knocked to remove soil, etc.
- Here the seedlings are being set into the soil, very shallow (only 1-2 cm deep). The transplanted seedlings are barely visible at the intersections of the lines. This operation proceeds very quickly once the transplanters have gained some skill and confidence in the method. As noted already, these seedling set out with two leaves can already have a third leaf by the next day.
- Picture provided by Mr. Shichi Sato, project leader for DISIMP project in Eastern Indonesia (S. Sulawasi and W. Nusa Tenggara), where > 1800 farmers using SRI on >1300 ha have had 7.6 t/ha average SRI yield (dried, unhusked paddy, 14% moisture content), 84% more than the control plots, with 40% reduction in water use, and 25% reduction in the costs of production.
- For more details on this evaluation, see: S. Sato and N. Uphoff, Raising factor productivity in irrigated rice production: Opportunities with the System of Rice Intensification, Review of Agriculture, Veterinary Science, Nutrition and Natural Resources , Commonwealth Agricultural Bureau International, Wallingford, UK, 2007.
- SRI is often hard to accept because it does not depend on either of the two main strategies that made the Green Revolution possible. It does not require any change in the rice variety used (genotype) or an increase in external inputs. Indeed, the latter can be reduced. SRI methods improve the yields of all rice varieties evaluated so far – modern and traditional, improved and local. The highest yields have been attained with HYVs and hybrid varieties (all SRI yields >15 t/ha), but ‘unimproved’ varieties can give yields in the 6-12 t/ha range when soil has been improved through SRI methods, so give the higher market price for these latter varieties, growing them can be more profitable for farmers.
- This picture was sent by Thadeusz Niesiobedzki in Poland, of his winter wheat crop that is being grown with single seedlings, wide spacing, use of organic matter, etc. approximating SRI. He hit upon these practices by accident (a long story) and also discovered the SRI internet web page, and saw the similarities between his practices and SRI, thereafter contacting Cornell by email to open up dialogue.
- SRI is often hard to accept because it does not depend on either of the two main strategies that made the Green Revolution possible. It does not require any change in the rice variety used (genotype) or an increase in external inputs. Indeed, the latter can be reduced. SRI methods improve the yields of all rice varieties evaluated so far – modern and traditional, improved and local. The highest yields have been attained with HYVs and hybrid varieties (all SRI yields >15 t/ha), but ‘unimproved’ varieties can give yields in the 6-12 t/ha range when soil has been improved through SRI methods, so give the higher market price for these latter varieties, growing them can be more profitable for farmers.
- Picture provided by Dr. Rena Perez. These two rice plants are ‘twins’ in that they were planted on the same day in the same nursery from the same seed bag. The one on the right was taken out at 9 days and transplanted into an SRI environment. The one on the left was kept in the flooded nursery until its 52 nd day, when it was taken out for transplanting (in Cuba, transplanting of commonly done between 50 and 55 DAP). The difference in root growth and tillering (5 vs. 42) is spectacular. We think this difference is at least in part attributable to the contributions of soil microorganisms producing phytohormones in the rhizosphere that benefit plant growth and performance.
- From MS thesis for Cornell University Department of Crop and Soil Sciences, based on field research in Madagascar in 2000-2001. QUEFTS model was used to assess relation between uptake of nutrients (N, P, and K analyses were all essentially the same) and grain production. The higher conversion rate of N uptake to grain output could be due to greater uptake also of micronutrients – through the larger, better functioning root system of SRI plants, so that the plants can better utilize macronutrients in grain production.
- SRI is often hard to accept because it does not depend on either of the two main strategies that made the Green Revolution possible. It does not require any change in the rice variety used (genotype) or an increase in external inputs. Indeed, the latter can be reduced. SRI methods improve the yields of all rice varieties evaluated so far – modern and traditional, improved and local. The highest yields have been attained with HYVs and hybrid varieties (all SRI yields >15 t/ha), but ‘unimproved’ varieties can give yields in the 6-12 t/ha range when soil has been improved through SRI methods, so give the higher market price for these latter varieties, growing them can be more profitable for farmers.
- Data are from same TNAU evaluation as the previous slide
- From report of National IPM Program to Vietnamese Ministry of Agriculture and Rural Development, April 2007, on the basis of which MARD designated SRI as a ‘technology advance’ and has begun supporting research and extension with SRI. Yield increases were lower in Vietnam than most other countries, 10-20%, but with cost saving, water saving, seed saving and more resistance to biotic and abiotic stresses, SRI was considered an improved method for rice production.
- This picture from Sri Lanka shows two fields having the same soil, climate and irrigation access, during a drought period. On the left, the rice grown with conventional practices, with continuous flooding from the time of transplanting, has a shallower root system that cannot withstand water stress. On the right, SRI rice receiving less water during its growth has deeper rooting, and thus it can continue to thrive during the drought. Farmers in Sri Lanka are coming to accept SRI in part because it reduces their risk of crop failure during drought.
- SRI is often hard to accept because it does not depend on either of the two main strategies that made the Green Revolution possible. It does not require any change in the rice variety used (genotype) or an increase in external inputs. Indeed, the latter can be reduced. SRI methods improve the yields of all rice varieties evaluated so far – modern and traditional, improved and local. The highest yields have been attained with HYVs and hybrid varieties (all SRI yields >15 t/ha), but ‘unimproved’ varieties can give yields in the 6-12 t/ha range when soil has been improved through SRI methods, so give the higher market price for these latter varieties, growing them can be more profitable for farmers.
- SRI is often hard to accept because it does not depend on either of the two main strategies that made the Green Revolution possible. It does not require any change in the rice variety used (genotype) or an increase in external inputs. Indeed, the latter can be reduced. SRI methods improve the yields of all rice varieties evaluated so far – modern and traditional, improved and local. The highest yields have been attained with HYVs and hybrid varieties (all SRI yields >15 t/ha), but ‘unimproved’ varieties can give yields in the 6-12 t/ha range when soil has been improved through SRI methods, so give the higher market price for these latter varieties, growing them can be more profitable for farmers.