Assessment of functional forms of crop yield loss models of invasive plant species applied in decision support tools and bioeconomic modelling

Dhakal, Bhubaneswor; Scanlan, Joe C.

doi:10.1016/j.agsy.2015.04.001

Cited by 3 publications

(2 citation statements)

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“…Although the pattern of planting was applied for 0.5 ha land area, this study has analyzed wood and rubber production by used 1 ha land area indicator. In the field, tree stands of ages 30, 35, 40 and 45 years were not available, so their characteristics were estimated mathematically using simple linear regression (Dhakal et al 2015).…”

Section: Data Collectionmentioning

confidence: 99%

Financial analysis of dipterocarp log production and rubber production in the forest and land rehabilitation program of Sekolaq Muliaq, West Kutai District, Indonesia

et al. 2018

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Lahjie AM, Lepong A, Simarangkir BDAS, Kristiningrum R, Ruslim Y. 2018. Financial analysis of dipterocarp log production and rubber production in the forest and land rehabilitation program of Sekolaq Muliaq, West Kutai District, Indonesia. Biodiversitas 19: 707-716. The Dayak community of East Kalimantan in the last decade has begun to develop production systems that integrate forest timber tree species into plantation commodity enterprises. They have become aware that the natural forest species of their surroundings such as Meranti (Shorea sp.) and Kapur (Dryobalanops aromatica) are often easier to exploit economically, and represent potentially cheaper investments, than are introduced plantation crops such as rubber (Hevea brasiliensis). This is because the price of rubber latex has decreased over the years and has ceased to give a financial return commensurate with the investment required to develop rubber as a monocrop. The research described in this paper aimed to evaluate the viability of a dipterocarp forest/rubber plantation system cultivated by people in the West Kutai District of East Kalimantan. The viability of the system was evaluated by (i) measuring its production of dipterocarp logs and natural rubber; (ii) determining the diameter distribution of its dipterocarp trees and (iii) assessing the financial feasibility of the dipterocarp/rubber system using the theories of increment production and basal area applied to the determination of Pay Back Period, Net Present Value (NPV), Net Benefit Cost (B/C) ratio and Internal Rate of Return (IRR). The research areas on which the evaluation was performed consisted of (1) a mixed population of Shorea spp. (Meranti) and rubber (Hevea brasiliensis) and (2) a mixed population of Dryobalanops aromatica (Kapur) and rubber. The growth analysis of Shorea spp. combined with rubber as well as D. aromatica combined with rubber at the planting distance of 5m x 5m showed that the maximum cycle was reached at the age of 40 years. Whereas the rubber trees in monoculture cultivation reached their maximum cycle at the age of 17 years. The optimum increment of MAI and CAI of Shorea spp. combined with rubber reached 3.61 m3 ha-1 year-1 and 3.62 m3 ha-1 year-1 respectively. The maximum increment of MAI and CAI of Dryobalanops aromatica combined with rubber reached 3.09 m3 ha-1 year-1 and 3 m3 ha-1 year-1 respectively.

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Section: Data Collectionmentioning

confidence: 99%

Financial analysis of dipterocarp log production and rubber production in the forest and land rehabilitation program of Sekolaq Muliaq, West Kutai District, Indonesia

et al. 2018

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“…As a result, the use of Nfertiliser and related GHG emissions were lower. This cropping system also serves to regenerate soil fertility (Dhakal and Scanlan, 2015), increase soil carbon levels (Paul et al, 2002), help maintain manageable pest populations and retard pest evolution (Crews and Peoples, 2004), reduce weed seed banks (Liebman and Dyck, 1993) and crop loss to some insects and diseases. Furthermore, some legumes have the capacity to prevent N leaching by producing nitrification inhibitors (Subbarao et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

An international comparison of agricultural nitrous oxide emissions

Maraseni

2016

Journal of Cleaner Production

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Agriculture and Environment

Bhattarai¹,

Conway

2020

Advances in Asian Human-Environmental Research

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COVER ILLUSTRATIONA mosaic of agriculture, forestry and semi-natural habitats at the edge of the hills. Feughside, Finzean, Kincardineshire, September 1984 (PhotograPh N Picozzi)The Institute of Terrestrial Ecology (ITE) was established in 1973, from the former Nature Conservancy's research stations and staff, joined later by the Institute of Tree Biology and the Culture Centre of Algae and Protozoa. ITE contributes to, and draws upon, the collective knowledge of the 14 sister institutes which make up the Natural Environment Research Council, spanning all the environmental sciences.The Institute studies the factors determining the structure, composition and processes of land and freshwater systems, and of individual plant and animal species. It is developing a sounder scientific basis for predicting and modelling environmental trends arising from natural or man-made change. The results of this research are available to those responsible for the protection, management and wise use of our natural resources.

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Assessment of functional forms of crop yield loss models of invasive plant species applied in decision support tools and bioeconomic modelling

Cited by 3 publications

References 61 publications

Financial analysis of dipterocarp log production and rubber production in the forest and land rehabilitation program of Sekolaq Muliaq, West Kutai District, Indonesia

Financial analysis of dipterocarp log production and rubber production in the forest and land rehabilitation program of Sekolaq Muliaq, West Kutai District, Indonesia

An international comparison of agricultural nitrous oxide emissions

Agriculture and Environment

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