Presentation on theme: "Land & Water Management for Drought Proofing K. K. Sahu Professor, Soil Science & Agril. Chem. R. K. Sahu Dean - Faculty of Agricultural Engineering Indira."— Presentation transcript:
Land & Water Management for Drought Proofing K. K. Sahu Professor, Soil Science & Agril. Chem. R. K. Sahu Dean - Faculty of Agricultural Engineering Indira Gandhi Krishi Vishwavidyalaya Raipur (Chhattisgarh), India for presentation in the International Conference on “Environl. Knowledge for disaster Risk Manag (ekDRM-2011).” New Delhi, May 10-11, 2011
Farmer's OFRSeed yield of rice (q/ha) Without OFRWith OFR Mean Mean OFR OFR OFR OFR OFR OFR OFR OFR OFR OFR OFR Mean Rice yield with and without water harvesting structures
Farmer' s OFR Seed yield of rice (q/ha) Extra Income due to OFR Without OFRWith OFR Mean Mean OFR OFR OFR OFR OFR OFR OFR OFR OFR OFR OFR Mean Net incomes from rice grown with and without water harvesting structures
Fig.1: Temporary check dams on Jonk river
Fig.2: Temporary check dams on nala.
DistrictImmediately With some improvement With some investment Total % to NCA % to TGA 1. Raipur Mahasamund Dhamtari Durg Raj’gaon Kawardha Bilaspur Janjgir Korba Raigarh Kanker Distribution of Culturable wastelands in Chhattisgarh – 2009+
Chhatt. Plains (44.5%)* (46.3%)* (51.1%)* (46.6%)* Jashpur Sarguja Koriya North Hill Region 6067 (3.7%)* (1.7%)* Bastar Narayanpur Dantewada Bijapur Bastar Plateau (51.8%)* (53.7%)* (48.9%)* (51.7%)* State Total1,65,310 (47.7%)** 1,01,347 (29.2%)** 79,984 (23.1%)** 3,46,641 (100%)** DistrictImmediatelyWith some improvement With some investment Total% to NCA % to TGA * % share in the state,** % share in culturable wasteland, +(Source : Chhattisgarh Govt.- Annual Agriculture Statistics, Office of the Commissioner Land Records)
Fig.3: Plant height as influenced by moisture conservation measures
Fig.4: Breast height diameter as influenced by moisture conservation measures
Fig.5: Plantations intercropped with green gram.
Fig.6: View of developed plantations in wasteland.
SMW Barren land Plantations KhamarSissooAonlaKalasirisJetrophaAverage Total ,609.1 Av. m 3 /ha The WHP of the sub micro-watershed under different land uses
S. N. Plant SpeciesWater application, lpd% saving in water Over basin PitcherDripBasinPitcherDrip Plantations 1 Albizia lebbeck (Kala Siris) Emblica officinalis (Aonla) Gmelina arborea (Khamar) Delbergia sissoo (Sissoo) Average Vegetables 1Bottle gourd Bitter gourd Cucumber Average CD: Irrigation – q/ha, Crop – q/ha, Interaction – q/ha Evaluation of micro irrigation in plantations and vegetables
Conclusion The rice productivity in OFR increased by one and half times to that without OFR. Rice yield in OFR supported area during drought year was equivalent to those obtained in normal rainfall years. The income from OFR based farming was 2.1 times higher than without OFR. The innovative technique of constructing temporary check dams increases the area under double crop, in the surrounding area of rivulets and rivers. Stylo scabra and Anjan was found suitable for Entisols under rainfed condition (biomass productivity: Stylo q/ha, Anjan-12.43q/ha). The tree species namely Emblica officinalis, Albizia lebbeck, Dalberzia sissoo and the Stylo scabra as intercrop performed well in comparison to others. Share of runoff (24.1%) from plantations + grasses/crops + conservation measures as compared to barren land (37.1%) signifies their role in in-situ moisture conservation, necessary for biomass production. The staggered trenches were found effective in trapping sediments and supplying moisture to young plantations. Vegetables and fish rearing were found remunerative. Grasses were cut by local villagers and used for animals. The silvipasture treated land progressively improved the soil health. Tree plantation in wastelands can be made economically attractive and socially acceptable by intercropping of legumes, grasses, fodder and vegetables with fish in ponds. In order to promote vegetables, micro irrigation can be used.