Vol. 8 No. 1 (1974)

. The effects of Endrin on soybean root nodules baccteria Rhizobium japonicum has been studied. In pot experiments with soybean and addition of Endrin gave no quantitative change of these bacteria during any part of the vegetation period, Rhizobium japonicum strains have been isolated from Endrin treated soil. These cultures grew fairly well in medium with Endrin as the sole source of carbon. Ringkasan. Telah diselidiki pengaruh insektisida Endrin terhadap bakteri nodula akar kacang kedele Rhizobium japonicum. Ternyata dalam percobaan dengan menggunakan pot yang disertai penambahan Endrin,…

. Recent A recent investigation into the volcanic geology of Minahasa revealed the existence and distribution of pyroclastic flow sheets of which origin and mode of emplacement are yet to be solved. These pyroclastic flow sheets are found covering nearly whole Minahasa. It consists of loose to dense tuff or tuffaceous material, containing angular, to subangular and rounded pumice fragments measuring from a few mm to 15-20 mm across, showing several cycles of deposition. Welding is only detected at one spot and very limited. Quartz fragments are common but not abundant. Along the lake of…

Ringkasan. Determination of surface - finish quality is done by measurements of its rms. Values of surface roughness and slopes. Mechanical measurements of these properties are done by using a profilometer. This method, however, is limited to surface having asperities larger then the size of the profilometer