Showing papers on "SISAL published in 1963"
TL;DR: According to local soil conditions, it is concluded that the root-system of New Zealand flax is relatively superficial, with the main concentration of roots in the 12 in.
Abstract: Results of preliminary studies on root-systems of New Zealand flax (Phormium tenax Forster), sisal (Agave sisalana Perrine), and imperial bamboo (Bambusa vulgaris Schrad. var. vittata A. & C. Riv.) plants by the method of soil block, are apresented and discussed by the authors. According to local soil conditions, it is concluded that the root-system of New Zealand flax is relatively superficial, with the main concentration of roots in the 12 in. soil top layer. In sisal, the root-systems of the three plants investigated were found to occur in the soil surface layer, with more of 90% of the roots in the top 6 in. Finally, in the imperial bamboo clump atudied, the main concentration of roots was found in the layer 6-12 in. deep.
TL;DR: This article showed that yarns spun at 11,500 rprn with 8.6% and 8.7% elongation were stronger than yarns spinning at 8000 rpm and 5000 rpm, respectively, as shown in Table 11.
Abstract: servation of results shows that at each speed there was a trend towards an increased elongation when the weight of the traveler was decreased below the normal one ( N ) , though changes were small; whereas for increases in traveler weight above normal there was a definite decrease in elongation, and in some instances the smaller elongations were associated with the higher values of strength. In this connection, a statistical analysis of data showed that there was a 0.6 inverse correlation between strength and elongation to break. However, as this correlation was found not to be significant at the 5% level it is plausible to assume that most of the changes occurring in yarn strength when shifting from one speed to another can be ascribed to actions taking place in the drafting zone, as previously concluded, and that spinning tension had very little effect on yarn strength. Further evidence of this can be found in the fact that yarns spun at 11,500 rprn with 8.6% and 8.7% elongation were stronger than yarns spun at 8000 rpm and 5000 rpm with 7.9% and 8.1% elongation, respectively, as shown in Table 11. However, in spite of these results we feel it should be pointed out once more that the twist multiplier of the yarns used here was about 5 (English system), and it is quite possible that with less twisted TABLE 111