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- W2071993547 abstract "ABSTRACT The farming regime of the Wola people of Nipa District in the Southern Highlands Province of Papua New Guinea features the cultivation of some land semi‐permanently under non‐perennial crops within the broad context of a swidden regime. An investigation of the fertility status of the soils they cultivate —Inceptisols variably affected by falls of volcanic ash — suggests how these farmers avoid the soil constraints that might otherwise prompt long‐term fallowing of sites under such a tropical subsistence agricultural regime. While organic matter and the elements N and K all decline significantly with time under cultivation, they settle at new equilibria which may not signify deficiencies for some crops. The other major nutrient P also falls significantly over time, although levels are relatively low throughout. Other nutrients show no significant variation. These findings comply with the wide variety of crops observed under cultivation early in the life of gardens, followed later by a virtual sweet potato mono‐crop. This crop is able to continue yielding adequately in the long term, following a decline in nutrient availability, notably because they remain in favourable ratios for tuberisation and because of its tolerance of low P conditions." @default.
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- W2071993547 date "1995-06-01" @default.
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- W2071993547 title "FALLOW AND FERTILITY UNDER SUBSISTENCE CULTIVATION IN THE PAPUA NEW GUINEA HIGHLANDS: II. SOIL FERTILITY" @default.
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- W2071993547 doi "https://doi.org/10.1111/j.1467-9493.1995.tb00069.x" @default.
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