The objective of this work was evaluating the principal alterations of the chemical properties of quality of the papaya 'Formosa' under refrigerated storage. The harvest of fruits was accomplished in a commercial planting located in the municipal district of Baraúna-RN. The storage happened in cameras under controlled conditions of temperatures (8, 10 and 12 ºC ± 1 ºC) and relative humidity of the air (90 ±5%) during periods of 7, 14, 21 and 28 days. After each period, the papayas were transferred to environmental conditions (20 ± 1oC 60 ± 5% UR) where a period of shelf life of seven days was simulated. Then, the papayas were analyzed regarding the titratable acidity (ATT), C vitamin, total soluble solids (SS), starch, reducing and non-reducing sugars. A completely randomized experimental design was used, in a factorial 3 x 4 outline (temperatures x time of storage), with five replications and two fruits per plot. The best extension for the post harvest useful life of papaya 'Formosa' was esteemed for the fruits submitted to 10 °C and 90 ± 5% UR up to 20 days, with soluble solids above 12% and C vitamin around 40 mg×100 g-1. The fruits submitted to 8 °C, 90 ± 5% UR had the worst estimates, presenting the smallest contents of SS.

The goal of this work was to evaluate the sulfur supply in soils of different textural classes using the mineral plaster originating of the region of Araripe-PE as sulfur source the sugar cane. They were installed 5 field rehearsals in different classes texturais soils to evaluate the effects of the mineral gypsum as sulfur source in the sugar cane plants nutrition. It searched the relations of the sulfur in plant, evaluating itself your availability. The rehearsals were led in the Zone of the Woods of Pernambuco. The experimental delineation employee was the one of blocks at random. The treatments in each rehearsal they constituted of the combination of 5 sulfur doses, with 3 repetitions (5 x 3). They evaluated the treatments at 16 months after the application of the sulfur doses calculated by the exchangeable aluminum neutralization and or calcium exchangeable content method, for the 0,4-0,6m soil depth layer. In the loamier soils and of smaller values of P-rem the sulfur doses promoted sugar cane larger production. The sulfur doses were enough for the sulfur supply for the sugar cane.