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1.
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Effects of application method and rate of P fertilizer on growth and initial production of young rubber trees grown on yellow red podzolic soil by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Bulletin Perkaretan 1993
Online resources:
Availability: Not available: RRII Library: Journals (1).

2.
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Manuring practices of rubber estates in North Sumatra by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Rubber Board Bulletin 1975
Availability: Not available: RRII Library: Journals (1).

3.
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The use of typic dystropept subsoil for rubber nursery in polibag by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Indonesian Journal of Natural Rubber Research 1995
Availability: Not available: RRII Library: Journals (1).