The objective of this study was to evaluate the efficiency of nitrogen fertilization associated with water-retaining as to the quality of lettuce seeds at different moisture levels. The experimental design used was composed of randomized blocks, in a 2 x 5 + 1 factorial scheme, with two moisture levels (50 and 75% field capacity) and five doses of nitrogen (0, 25, 50, 100 and 200 kg ha-1, with the addition of water-retaining gel, besides an additional treatment, without gel addition, with moisture at a level of 100% field capacity and standard nitrogen fertilization (100 kg ha-1), which will consist of the control treatment, with five replications. The analyzed variables were: water content, germination, germination speed index, electrical conductivity, and accelerated aging. The evaluated factors showed no significant interaction, for most of the analyzed variables, with the exception of the germination speed index. For germination, there was significant effect for the ‘levels of moisture in the substrate’ factor. Comparing the means of the treatments with the control, for electrical conductivity, all treatments had lower EC values, which indicate better vigor. It is concluded that using water-retaining gel associated with nitrogen fertilization allows the use of lower levels of moisture in the substrate (50%), without affecting the quality of the produced seeds. N doses fr

Baby corn is a growing crop in the agricultural setting, however there is still a lack of research in the area of fertilization, especially nitrogen fertilization. The objective of this study was to evaluate the influence of nitrogen fertilization on agronomic yield and quality of baby corn. Outlined in randomized blocks with four replications, the treatments consisted of five levels of nitrogen fertilization (50, 75, 100, 125 and 150%), based on the recommended dose for green corn crop (150 kg ha-1 of N). After harvesting, the following agronomic variables were evaluated: Number, productivity, dry matter, length and diameter of commercial and non-commercial spikelets. And the variables of post-harvest quality were: Soluble Solids, Titratable Acidity, Ratio of soluble solids and titratable acidity, Hydrogen-ion potential and firmness. Nitrogen fertilization at 150 kg ha-1 resulted in an increase in the total number of spikelets per hectare, around 405,000. There was an increase in productivity due to the increasing levels of nitrogen fertilization, with maximum yield of 4.4 t ha-1 at a dose of 165 kg ha-1 of N. The soluble solids content presented a maximum of 10.05 ° Brix with the N applied to 222 kg ha-1. Nitrogen fertilization around 150 to 165 kg ha-1 increases the agronomic yield of the crop, without affecting its characteristics of quality.