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321.
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Diurnal variation in nitrogenase activity of common cover crops in rubber plantations of Sri Lanka by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Journal of the Rubber Research Institute of Sri Lanka 1989
Availability: Not available: RRII Library: Journals (1).

322.
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Do advanced rubber planting materials shorten immaturity ? Analysis of further data by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Rubber Board Bulletin 1989
Availability: Not available: RRII Library: Journals (1).

323.
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Easy processing epoxidised natural rubber by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Journal of Natural Rubber Research 1989
Availability: Not available: RRII Library: Journals (1).

324.
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Economic appraisal of sheep grazing under rubber plantation in Peninsular Malaysia by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: In: Symposium on agroforestry systems and technologies, Bogor, Indonesia, 19-21 September 1989. 1989
Online resources:
Availability: Not available: RRII Library: Journals (1).

325.
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Economics of rainguarding: A comparative analysis by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Indian Journal of Natural Rubber Research 1989
Availability: Not available: RRII Library: Journals (1).

326.
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Effect of abnormal leaf fall disease caused by Phytophthora spp. on the yield of rubber tree by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Indian Journal of Natural Rubber Research 1989
Availability: Not available: RRII Library: Journals (1).

327.
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Effect of active phenol formaldehyde-resin-zinc oxide-system as a curative for soft thermoplastic natural rubber-polypropylene blends by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: 136th Meeting, Fall, October 1989, Conference Proceedings 1989
Availability: Not available: RRII Library: Journals (1).

328.
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Effect of bordeaux paste as a repellent of slugs(Mariaella dussumieri Gray)infesting rubber plants by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Indian Journal of Natural Rubber Research 1989
Availability: Not available: RRII Library: Journals (1).

329.
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Effect of continuous application of nitrogenous fertilizer on sulphur status of soil by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Proceedings of the National Seminar on Sulphur in Agriculture, September 1989, Bangalore, pp. 57-63. 1989
Availability: Not available: RRII Library: Journals (1).

330.
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Effect of gamma irradiation on rubber-filler interaction in silica filled natural rubber latex vulcanizates by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Kautschuk Gummi Kunststoffe 1989
Availability: Not available: RRII Library: Journals (1).

331.
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Effect of incubation time on acetylene reduction activity of common cover crops of Sri Lankan Rubber plantations by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Journal of the Rubber Research Institute of Sri Lanka 1989
Availability: Not available: RRII Library: Journals (1).

332.
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Effect of sampling intensity on precision of soil and foliar data. 1. Paleudults derived from granite by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Journal of Natural Rubber Research 1989
Availability: Not available: RRII Library: Journals (1).

333.
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Effect of silane coupling agent on mechanical properties and polymer-filler interaction in silica filled epoxidized natural rubber by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Kautschuk Gummi Kunststoffe 1989
Availability: Not available: RRII Library: Journals (1).

334.
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Effect of stick plant vigour on the growth of scion in Hevea brasiliensis by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Phytobreedon 1989
Availability: Not available: RRII Library: Journals (1).

335.
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Effect of vulcanization systems in the chemical characteristics and physical properties of natural rubber latex thread by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Plastics and Rubber Processing and applications 1989
Availability: Not available: RRII Library: Journals (1).

336.
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Effects of potassium and magnesium on leaf and bark nutrient contents of young Hevea brasiliensis by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Journal of the Rubber Research Institute of Sri Lanka 1989
Availability: Not available: RRII Library: Journals (1).

337.
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Effects of selected environmental and technological factors on rubber production - A case study of RRIM economic laboratory by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Journal of Natural Rubber Research 1989
Availability: Not available: RRII Library: Journals (1).

338.
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Estimation of sawntimber yield from rubber plantings by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Planter 1989
Availability: Not available: RRII Library: Journals (1).

339.
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Evaluation of fertilizer rates for a rubber industry in south Bahia by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Agrotropica 1989
Online resources:
Availability: Not available: RRII Library: Journals (1).

340.
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Evaluation of seedling progenies of male sterile clones of Hevea brasiliensis (Willd. ex. Adr.de Juss.) Muell. Arg. at the nursery stage by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Indian Journal of Natural Rubber Research 1989
Availability: Not available: RRII Library: Journals (1).