3 research outputs found
Influence of row spacing on canopy and seed production in grain amaranth (Amaranthus cruentus L.)
A new crop recently introduced in Italy is amaranth. Studies involving agronomic
techniques on this plant are limited. The aim of the present research was to assess the effect of
distance between rows on both seed yield and ground cover in Amaranthus cruentus L. Sowing
treatments included two single row spacing designs (18 and 60 cm) and one double row spacing
design (18 + 60 cm). At the six true leaf stage, in the single row design of 60 and 18 cm row
spacing, ground cover was 16% and 47% respectively. An intermediate coverage of 31% was
evident in the double rows. At the ten true leaf stage, plants cultivated in single rows at 18 cm
covered the ground early, thereby attaining a ground cover of 85%. Regarding yield, a seed
production of 0.92 t ha-1 was obtained from plants in the double row design compared to the
respective single row spacing designs of 18 and 60 cm, where yields were 0.85 and 0.70 t ha-1
respectively. The selection of one mode of sowing over another will largely depend on the type
of equipment available to the farm. Whilst single row spacing distances of 18 cm displayed a net
of advantage against weeds, difficulties were encountered in the case of managing weeds by
mechanical equipment. The use of double rows permitted taking advantage of a slightly better
ground cover than single rows, together with the possibility of mechanical intervention for the
control of weeds, and importantly also provided a higher yield
Optimizing sowing time for boosting productivity and nutritional quality of amaranth (Amaranthus cruentus L.) genotypes under Mediterranean climate
Modelling the Effect of Keyline Practice on Soil Erosion Control
The global agricultural sector needs to implement good soil management practices, in particular to prevent erosion and to improve water-retention capacity. The introduction of tillage techniques along particular theoretical lines, called keylines, can make a significant contribution to improving the management of the soil and agricultural crops. The keyline system has been around for less than 100 years. With this preliminary work, we performed a comparative analysis of two small river basins (less than 100 ha) before and after keyline application, based on GIS computational models (TWI and SIMWE). The calculation models were elaborated starting from a DTM with 2 m resolution, obtained from a LIDAR survey. The comparative analysis, in qualitative terms, showed a positive effect of the keylines, both in terms of erodibility and infiltration of runoff water. The use of GIS models to verify the effectiveness in the planning phase can constitute a decision support system that guides agronomists, technicians, and farmers