There is widespread concern that the higher- yielding rubber clones can only thrive in a monocultural plantation ... CIRAD - CP and the Sembawa Rubber research station , to test the hypothesis that higher yielding rubber germplasm can ...

With reference to the plantation selections , the ones that were made on the Goodyear plantations proved to be too ... breeding and testing cannot produce clones that will be superior to anything yet developed in rubber or cacao .

A long - time rubber experiment to test various root stocks and yields were planted at the request of the Minister of Agriculture of Costa ... The Cinchona nursery of the American Cinchona Plantation was taken over by the Institute .

The liquid media method for testing resistance , described by R. G. Orellana , has been applied to the pod shells of ... A severe outbreak of Ph . palmivora on the rubber of the mixed plantation at La Hulera did not affect the cacao .

( 3 ) Rubber content of 1. ( 4 ) Factors not analysed . Last imply that the only true test of genetic ability to yield is a tapping test , Utilization of Variation , First data Whitby ( 1919 ) . 245 trees examined for rubler ...

DRI organizers also indicated an interest in promoting fuelwood plantations , and the communal management of forests ... Rubber and Cacao are the crops which have been given most emphasis ; project plans foresee the plantation of 350 to ...

Visit to Agricultural College and rubber plantation . On return journey , visited experiment station at Penonomé . ... Red · laboratory and pot - testing station . Returned to San José , Costa Rica by ' plane in morning .

from various regions or areas in the jungle native habitat of Hevea rubber ; and the third , which was carried along ... With reference to the plantation selections , the ones that were made on the Goodyear plantations proved to be too ...

There is , up to the present , almost no attempt to have plantation plantings of the most important crops of the area which include the Brazil nut ( Bertolleta excelsia ) and Hevea rubber .

Heritability and gain from selection in rubber ( Hevea brasilensis ) . Silvae Genet . ... Genetic control of 1.5 - year - old traits in Pinus patula Schiede et Deppe and a comparison of progeny test methods . Silvae Genet .