In order to demonstrate the effectiveness of Ultrasol® Apple, a trial was carried out in Saltillo (Coahuila, México) to assess the effects of a fertigation programme with Ultrasol® Apple against a traditional programme in terms of quality, vegetative tree growth and yield. The trial was carried out on a 7 year old apple variety Golden Delicious, grafted on a MM 106 rootstock, with a tree spacing of 5x3 m² and a density of 667 trees/ha.
The trial had a randomized block design and each treatment consisted of 10 replicates of 10 fruits; each taken to measure weight, equatorial diameter, pulp pressure and degrees Brix. Analysis of Variance (ANOVA) was applied to evaluate statistical differences between treatments. In case of a significant difference, Fisher's test was applied with a 5 % probability level.
Comparison table between the 2 fertigation programmes.The results of the applied treatments clearly affirm the effectiveness of Ultrasol® Apple:
- The effect on fresh fruit weight was on average + 31 % (left table here below).
- The effect on degrees Brix was on average + 7 %
The application of Ultrasol® Apple (40,3 MT/ha) resulted in 9,6 MT/ha or 31 % more yield as compared to the traditional programme (30,7 MT/ha) i.e. generated 7.241 US$/ha more income for the farmer.
Applying Ultrasol® Apple also resulted in statistically significant differences in fruit weight, fruit diameter (size) and °Brix. No significant effect was found on pulp pressure, which means that increased fruit size did not occur at the expense of reduced fruit firmness.
Ultrasol® Apple is part of the Ultrasol® Cultivo range which was designed to meet the needs and demands of small growers.