Rubber, rubber and rubber: how 75 years of successive rubber plantations rotations affect topsoil quality

2021 ◽  
Author(s):  
Phantip Panklang ◽  
Alexis Thoumazeau ◽  
Rawee Chiarawipa ◽  
Sayan Sdoodee ◽  
David Sebag ◽  
...  
Keyword(s):  
Rubber Plantations

Soil degradation in oil palm and rubber plantations under land resource scarcity

2016 ◽  
Vol 232 ◽  
pp. 110-118 ◽  
Author(s):  
Thomas Guillaume ◽  
Anna Mareike Holtkamp ◽  
Muhammad Damris ◽  
Bernhard Brümmer ◽  
Yakov Kuzyakov
Keyword(s):  
Oil Palm ◽  
Soil Degradation ◽  
Resource Scarcity ◽  
Land Resource ◽  
Rubber Plantations

scholarly journals Determination of the Influence of Cultural Techniques "Densities and Opening Standardʺ on Agrophysiological Parameters of Clones Pb 260, Irca 111 and Rrim 703

2021 ◽  
pp. 31-39
Author(s):  
Diarrassouba Moussa ◽  
Soumahin Eric Francis ◽  
Konan Djézou ◽  
N’guessan Kan Pulchérie ◽  
Moro Affia Perpetue ◽  
...  
Keyword(s):  
Experimental Design ◽  
Hevea Brasiliensis ◽  
Normal Density ◽  
Low Density ◽  
Annual Increase ◽  
Rubber Plantations ◽  
Average Annual Increase ◽  
Sustainable Improvement ◽  
Cultivation Techniques

To find out the effect of cultural techniques on agrophysiological parameters, four combinations ̏planting densities (low density or DF at 350 t/ha, normal density or DN at 510 t/ha) and opening standards (opening at 65cm and opening at 50 cm) ̋ were tested on Hevea brasiliensis clones PB 260, IRCA 111 and RRIM 703. This study was conducted for nine years with a split-plot experimental design of two treatments and two subtreatments repeated three times. The different combinations of treatments and subtreatments tested were low density (DN-50 cm), low density (DN-65 cm), normal density (DF-50 cm), normal density (DF- 65 cm). The parameters evaluated were the production at bleeding and per hectare, the average annual increase in circumference, the rate of tree losses and the rate of trees with dry notches. Production per tree was significantly higher at 350 t/ha and 65 cm opening (DF-65 cm), while per hectare production was higher at 510 t/ha. The girths of the different clones are stronger at DF and at the 65 cm opening. The rate of tree loss and the rate of trees with dry notch were low at the 510 t/ha density and the 65cm opening. The appropriate density and opening standard was "normal density 510 t/ha and opening to circumference 50 cm". The cultivation techniques especially the density and opening standard judiciously applied can participate in the sustainable improvement of rubber productivity of rubber plantations.

Natural flora improves properties of acid soil in rubber plantations

2020 ◽  
Vol 68 (3) ◽  
pp. 315-321
Author(s):  
M.D. Jessy ◽  
V.K. Syamala ◽  
A. Ulaganathan
Keyword(s):  
Acid Soil ◽  
Rubber Plantations ◽  
Natural Flora

Turning Tropical

2018 ◽  
pp. 130-166
Author(s):  
Michitake Aso
Keyword(s):  
World War Ii ◽  
Human Disease ◽  
Human Biology ◽  
Industrial Agriculture ◽  
Pasteur Institute ◽  
World War ◽  
Racial Categories ◽  
Rubber Plantations ◽  
Colonial Society ◽  
Ecological View

Rubber plantations necessitated extensive medical studies of human biology and diseases. Researchers at the Pasteur Institute carried out numerous studies of mosquitoes and plasmodia, and to a lesser extent other pathogens, among plantation workers. Race served as an important analytic category for these researchers even as anthropologists were beginning to question the coherence of racial categories. Chapter 4 investigates the racialized society that the architects of industrial agriculture imagined they were creating. It also discusses the interactions in Indochina between the burgeoning tropical sciences and government and transnational capital, focusing on human disease environments to examine how “rubber science” was applied to the surrounding countryside. If plantations were microcosms of the global colonial society, they were also laboratories where solutions to colonial problems were worked out. Tropical agronomy, geography, and medicine, linked by an ecological view of climates and soils, helped naturalize racial distinctions for the colonizers. Yet the colonial subjects who were the targets of these projects did not act in ways that race makers expected. While these subjects could not control the discourse of race, they could appropriate it for their own ends, and they attempted to do so before the outbreak of World War II.

Cultivating Science

2018 ◽  
pp. 59-91
Author(s):  
Michitake Aso
Keyword(s):  
Political Economy ◽  
The Political ◽  
Detailed Knowledge ◽  
Rubber Industry ◽  
Agricultural Improvement ◽  
Rubber Plantations ◽  
French Colonial ◽  
Plantation Agriculture ◽  
Colonial Government ◽  
The Relationship

Plantation regimes encouraged knowledge production about plant and disease ecologies and the relationship among organisms and their environments more generally. More detailed knowledge about newly introduced plant species, plant and human diseases, and their shared environments was a key ingredient of better, more profitable management of rubber plantations. Chapter 2 explores the process by which agronomy came to support the burgeoning rubber industry after rubber arrived in Indochina in 1897. The French colonial government was not the first to encourage agricultural improvement on the Indochinese peninsula, but the qualitative and quantitative investment that it made in these projects set it apart from previous states. Encouraged by the success of their British and Dutch neighbors, French planters envisioned turning biologically and culturally diverse landscapes into neat rows of hevea. Plantation agriculture also played an important role in defining the political and intellectual scope of the science of ecology in Indochina, encouraging agronomists to direct their energies toward transnational businesses and the colonial project. The process of integrating the efforts of scientists, officials, and planters was not always smooth, however, and this chapter highlights the conflicts and tensions generated by a political economy of plantation agriculture.

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