If juice had a oBrix value of 12 and an acid value of 0.8%, the ratio would be 15. For example: if the oBrix value is 12 and the total acid value is 1.0%, the ratio would be 12. Yara’s research centre is also working with a more ecofriendly nitric acid concept, but it will take a few more years before large-scale testing can take place. The TSS/acids ratio is determined by simple division. The site consists of a mine, two sulphuric acid plants, one phosphoric acid plant, one nitric acid plant and one NPK fertiliser plant. Exceptions in fruit color may be made in early fruit harvests this fruit may be 'degreened' in ethylene chambers. In Mediterranean climates, fruit is harvested when the appropriate TSS/acid ratio is reached and the fruit is orange on its entire surface. In tropical climates harvesting of oranges commences when the minimum TSS/acid ratios are reached and the fruit has a green-yellow color on no more than 25% of its surface. For grapefruit between 5 to 7:1 is the standard for marketable produce. yàrá EUROLAB n pese idanwo ati awn i ibamu laarin ipari ti boewa EN 1436. In the USA, a minimum TSS/acid maturity ratio of between 7 to 9:1 is typically desired for oranges and mandarins. During the ripening process the fruit acids are degraded, the sugar content increases and the sugar/acid ratio achieves a higher value. Key Parameters, Phosagro, Yara International ASA, CF Industries Holdings Inc, Acron. This technology removes more than 90 of the N2O emissions in Yaras plants and. ammonia, nitric acid, sodium silicofluoride, sulphuric acid. At the beginning of the ripening process the sugar/acid ratio is low, because of low sugar content and high fruit acid content, this makes the fruit taste sour. ammonia concentration in wastewater, reacting it with sulphuric acid to.