The present study was carried out to determine the contribution of main stems and tillers to the total yield of two wheat cultivars (Triticum aestivum L.), Cocoraque and BH-1146, under

Efeitos de maturadores nas características tecnológicas da cana-de-açúcar com e sem estresse hídrico AbstractThe sugar cane is one of the most important crop in Brazil. Many areas cultivated with this crop is subjected to flowering, which is not wanted once it reduces sucrose. The objetive of the present trial was to evaluate the effect of maturators on technological characterists of sugar cane on soils with and without water stress. The experimental design was a 2x4 factorial (two water conditions in the soil, three maturators and control) replicated four times. The maturators were sulfometuron-methil (15 g ha ). The evaluated area was arranged by three lines of sugar cane of the reagent cultivar SP 813250, with 8 meter long spaced in 1,4 m between rows. The evaluated characteristics were Pol%, fibre and Brix at 0, 21, 30, 45, 60 and 75 days after aplication. The maturator action increased significant with the soil water at 0 and 21 days after aplication. The increases in Pol%, fiber and Brix were not significant with the application of sulfometuron-methil and ethephon. The application of sulfometuron-methil antecipated the harvest of sugar in 15 days.

This work aimed to analyze the effect of the variation of the proportions of calcium in relation to the contentes of magnesium and potassium in the cationic capacity of change (CCC) of the soil, seeking to propitiate the  appropriate balance of bases, so that the soybean plants presented good nutritional state and had conditions of resisting to the attack of Phakopsora pachyrhizi Syd. & P. Syd. The experiment was driven in randomized blocks with eight replications and the treatments consisted of doses of Ca:Mg:K in relation to CCC of the soil being:1) without correction of the bases (original soil with 3,8%:6,6%:2,4%); 2) 35:15:5; 3) 45:15:5; 4) 55:15:5; 5) 65:15:5; 6) 75:15:5. The soybean cultivar used in the experiment was BRS 184, sowed in mud vases containing dystrophic Red Latosol (Oxisol) as substrate. The inoculation was realized in the fenologic stadium V4. The disease severity was determined through visual notes considering the percentage foliate area with visible symptoms of the disease, being calculated the Area Under Disease Progress Curve (AUDPC). The data were submitted to the variance analysis (p<0.05) and fitting to regression models. The balance among the nutrientes was analyzed being calculated the index DRIS. The contents of nutrients, the matter dry indexes (MDI) and nutritional balance index (NBI) were inserted in the program ChecarDris for obtaining of the index DRIS. The results appeared that the percentages of 55% of calcium, 15% of magnesium and 5% of potassium, increase larger nutritional balance in the soybean providing to smallest area under disease progress curve (AUDPC), reduction in the severity of the rust (%), besides increase the largest productivity.