ABSTRACT.


BEINES PELIOWSKI K.1
 

1) - The ultimate purpose oí this work was to determine the rate of seeding of hemp that produces the best quality of stalks and the greatest yield of fiber and seed. The specific object was to investigate the relationship between the amount of hempseed sown and:
a) Several characters that indicate the fiber quality of the stalks (technical length, diameter and number of internodes);
b) Fiber percentage; and
c) Yield of seed, stalks and fiber.
2) - The investigation was conducted for three years at the Aconcagua Plant Breeding Station by sowing different amounts of seed which vaded between 90 and 300 kilos per hectare (90-150-200-250-300) with five replications each. The yield of seed and the mean technical length, mean diameter, mean number of internodes, and yield of stalks were determined. By chemical retting of small representative samples (150 to 200 gr.), the percentage of fiber also was determined and from this the fiber yield was calculated subsequently.
3) - An analysis of variance of the results indicates that the differences between the five seeding rates with reference to the technical length of the stalk, the yield oí both stalk and seed, and the percentage and yield of fiber are not signifficant. Differences between rates of seeding are significant only as regards two factors: (a) diameter of stalk and (b) number of internodes.
In view of the results obtained, under the conditions of the experiment it is not advantageous to sow more than 90 kilos of hempseed per hectare in orden to produce the best quality of stalks and the greatest yield of fiber and seed.

Keywords:
1 Ex-Ing. Agr. del Departamento de Genética y Fitotecnia.