A fresh look at shifting cultivation: Fallow length an uncertain indicator of productivity

Gabriel Tonga, Noweg (2008) A fresh look at shifting cultivation: Fallow length an uncertain indicator of productivity. Agricultural Systems, 96 (1). pp. 75-84. ISSN 0308-521X

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Shifting cultivation is practiced by millions of farmers in the tropics and has been accused of causing deforestation and keeping farmers in poverty. The assumed positive relationship between fallow length and crop yields has long shaped such negative opinions on the sustainability and environmental impact of the system, as population growth is believed inevitably to lead to its collapse. Empirical evidence for this assumption is scarce, however, and a better understanding of system dynamics is needed before discarding shifting cultivation as unsustainable. With cases from Malaysia and Indonesia, we show that fallow length is a weak predictor of crop yields, though interactions with fertilizer inputs may increase its importance. Other factors such as drought, flooding, and pests are more important determinants of yields. The implication is that when using natural fallow as the only means of nutrient supply, there is no need to cut old fallow vegetation. Moreover, there is no evidence of system collapse, even at short fallow periods. We conclude that shifting cultivation should be accepted as a rational land use system and that earlier calls for bringing a ‘‘Green Revolution’’ to shifting cultivators are still relevant to achieve intensive and sustainable production.

Item Type: Article
Uncontrolled Keywords: Borneo; Fallow; Kalimantan; Land use; Rice production; Sarawak; Southeast Asia; Upland rice, unimas, university, universiti, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak
Subjects: S Agriculture > S Agriculture (General)
Divisions: Academic Faculties, Institutes and Centres > Institute of Biodiversity and Environmental Conservation
Depositing User: Karen Kornalius
Date Deposited: 09 Jun 2016 01:40
Last Modified: 09 Jun 2016 01:40
URI: http://ir.unimas.my/id/eprint/12271

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