Abstract
This experiment was installed in the experimental plot of the Faculty of Agrarian Sciences, National University of Asuncion Department of Amambay, Paraguay, with the objective of evaluating the yield of four varieties of cassava in three harvest intervals. The experimental design was randomized blocks, with four treatments (Seda, Pomberi, Sa’yju and Tacuara) and five repetitions. The spacing was 0.8 x 0.7 m, with a population density of 17,870 plants per hectare. Root quantity per plant, root weight per plant, amount of commercial and non-commercial root, weight of commercial and non-commercial root, yield per hectare were evaluated at eight, ten and twelve months after planting. The root number per plant was infuenced (p 0.05) depending on the varieties and harvest intervals. The root weight per plant does not present significant differences (p> 0.05) between varieties and harvest intervals. Commercial root weight and root yield were significantly (p <0.05) higher in harvest intervals performed 12 months after sowing, where the Tacuara variety showed the highest yield. Variety of table or sweet manioc Tacuara presents superior performance at 12 months after sowing. Cassava varieties tested have acceptable production parameters, and the knowledge of them as well as cutting interval may allow better use mainly by small farmers. It is recommended to evaluate the influence of planting density on the varieties and cutting interval. Keywords: Manihot esculenta, agronomic behavior, cultivars, harvest index.
Highlights
Cassava is a woody, perennial shrub plant that produces tubers rich in starch, suitable for human and animal consumption (Okogbenin et al, 2013)
Statistically there was no significant differences between the harvest intervals for the variable number of roots per plant, a greater tendency is observed (Table 2) when they are harvested at eight months after planting
The total number of roots per plant and number of commercial roots observed in the present investigation was lower than those reported by Shindoi et al (2018) in an investigation of agronomic performance of ten cultivars of cassava in the Argentine Chaco
Summary
Perennial shrub plant that produces tubers rich in starch, suitable for human and animal consumption (Okogbenin et al, 2013). The objective of the present investigation was to verify the agronomic characteristics of four varieties of cassava in three harvest intervals in the district of Pedro Juan Caballero, Paraguay. Significant effect (p
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