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Is dual cropping under centre pivots a justifiable irrigation practice?

Is dual cropping under centre pivots a justifiable irrigation practice?. Leon Van Rensburg, JH Barnard, JB Sparrow, ATP Bennie and CC Du Preez. Department of Soil, Crop and Climate Sciences. Background.

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Is dual cropping under centre pivots a justifiable irrigation practice?

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  1. Is dual cropping under centre pivots a justifiable irrigation practice? Leon Van Rensburg, JH Barnard, JB Sparrow, ATP Bennie and CC Du Preez Department of Soil, Crop and Climate Sciences

  2. Background • WRC (Report No K5/1647, 2012): MANAGING SALINITY ASSOCIATED WITH IRRIGATION AT ORANGE-RIET AND VAALHARTS IRRIGATION SCHEMES * Calibration and validation of the SWAMP model * Crop selection * Soils * Crop production * Irrigation scheduling *Best management practice

  3. Background

  4. Orange-Riet

  5. Vaalharts

  6. Vaalharts

  7. Vaalharts

  8. Case study: Vaalharts (V6 & v7)

  9. Vaalharts

  10. Is dual cropping under centre pivots a justifiable irrigation practice?

  11. MATERIAL AND METHODS: Soil information

  12. MATERIAL AND METHODS: Water balance Gain of water: Rainfall and Irrigation Evaporation and transpiration Salts will accumulate Leaching Drainage effluent (Degrading ground and surface waters)

  13. MATERIAL AND METHODS: Measurements

  14. East Rainfall Irrigation Soil water Water table depth

  15. West Rainfall Irrigation Soil water Water table depth

  16. Results on SWB: East (v7)

  17. Results on SWB: West (v6)

  18. Results on yields: East (v7)

  19. Results on yields: West (v6)

  20. CONCLUSION

  21. Thank you

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