The first half of this century was a period of great progress by the Dutch in tropical agriculture,
and PJS Cramer was one of the outstanding men responsible for these achievements. He …

Sugar-cane breeding in Java Page 1 Sugar-Cane Breeding in Java Hybridization work and
commercial introduction of many new clones into the sugar plantations of this island have …

Wild rubber and selection Page 29 Wild Rubber and Selection. BY DR. PJS CRAMER,
Buitenzorg. Introduction. § 1. § 2. Variations with cultivated and wild trees. § 3. Variation in …

In this and Arch. Rubb. Cult. (1956) 33, pp. 345-59, written in 1940 and 1949 but not previously
published, the author reviews the development of the rubber industry in Indonesia and …

In these this and Arch. Rubb. Cult. (1956) 33, pp. 259-344, written in 1940 and 1949 but not
previously published, the author reviews the development of the rubber industry in Indonesia …

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Vorliegende Arbeit, als Beantwortung einer Preisfrage der „Hollandsche Maatschappij van
Wetenschappen" zu Haarlem eingesandt und von ihr mit goldener Medaille bekront, geriet …

The earliest attempts at grafting coffee in the Dutch East Indies, about 1895, were undertaken
not to improve yield but to combat nematode attack to which Coffea arabica was very …

In de volgende bladzijden zijn de resultaten nedergelegd van een onderzoek betreffende
de variabiliteit bij verschillende koffiesoorten, verricht gedurende mijn werkzaamheid als …

Clonal seedlings are quicker and cheaper to establish than bud grafts but are more demanding
and more risky. Their yields may be as high and they come into tapping earlier. Yields …