An agroforestry practice for the development of salt lands using Prosopis juliflora and Leptochloa fusca.
In an 8-year field trial for the amelioration of an alkali soil in Haryana, India, the growth and biomass production of Prosopis juliflora was greater in a sole stand than when interplanted with the grass Leptochloa fusca, but soil improvement was greater for the mixed tree-grass treatment. Prosopis accumulated substantially more biomass nutrients when in sole stand, but total nutrient recycling was similar with and without grass. Less salt-tolerant but more palatable fodder crops such as Trifolium resupinatum, Trifolium alexandrinum and Melilotus denticulata were successfully grown with Prosopis after removing L. fusca in the Prosopis plus grass treatment 50 months after commencement. Tentative economic analysis suggests that the Prosopis plus grass system gives higher returns. The Prosopis-Leptochloa system combines production with biological reclamation, and is an appropriate form of reclamation agroforestry for alkali lands. Author's summary. KEYWORDS: TROPAG | Prosopis juliflora Leptochloa fusca | Forage and Pastures | trees | Prosopis | feed grasses | saline alkali soils | reclamation | agroforestry | India | Haryana.