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

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 …

A critical account of a lecture by JS Vollema on Hevea selection in West Java. The lecturer
mentioned the increased yield obtained by monoclonal plantings, starting with a dense stand …

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

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 …

Dr. Cramer here develops the theme alluded to in an earlier section (Ibidem, 1934, 82: 278-80
and 332-7, HA, 1934, 4: 3: 470) that the planting of clonal budded rubber may eventually …

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 …