The timbó (Magonia pubescens St. Hil.), tree typical of the cerrado, has medicinal, timber, craft, ornamental and larvicidal. The aim of this paper to evaluate seedling emergence of M. pubescens under different light conditions. The experiment was conducted in chambers B.O.D. temperature 30 °C, substrate sand, in a completely randomized design with five treatments and four replications of 50 seeds. The treatments were: 1) a photoperiod of 24 hours, 2) absence of light, 3) a photoperiod of 12 hours, 4) a photoperiod of 8 hours and 5) a photoperiod of 16 hours. The smallest percentage and emergence rate (45% and 14 days) were provided 12 h light and 12 h dark, and the emergence in all treatments was high (90 to 97.5%) and emergency speed too (7.4 to 10.5 days). The seeds of M. pubescens photoblastic are neutral in laboratory conditions at a temperature of 30 ºC and the emergence occurs between four and nine days.

In the reclamation of a degraded area, it is important the use of nitrogen fixing legumes, associated with climax species, to make possible a faster recovery of the environment. In urban centers various wastes are produced, among them the marble rock waste, which, despite having agricultural value, ends up being thrown in the environment.. The objective of this work was to evaluate the Cedrela fissilis growth and of pioneering legume in quincunx system, in degraded area, fertilized with doses of marble rock waste. The treatments, distributed in factorial scheme 2 x 4, in the randomized block design, with three replicates, were: two species of pioneering legume (Acacia mangium and Acacia auriculiformis in quincunx system with the Cedrela fissilis) and four doses of marble rock waste (0; 300; 600 and 900 g.cova-1). Were determined annually, along three years, the height of the plants, the stem diameter, the cup diameter and, in the end, the mortality percentage. The Acacia auriculiformis presented characteristic of better growth than the Acacia mangium and greater resistance to adverse conditions of degraded soil. There was tendency of reduction of the characteristics of growth of the Cedrela fissilis and of the Acacias with the increment of the doses of rock powder applied to the soil. The Cedrela fissilis presented, in general, larger growth, when combined with Acacia mangium than with Acacia auriculiformis, however, showed a high mortality after two years of planting.

The growth retardants Paclobutrazol (PBZ) and Cycocel (CCC) had been used, in spraying, associates or not with two cytokinins: Benziladenina (BAP) and Thidiazuron (TDZ), and a nitrogenous base, the Uracil, with the purpose of studying its effect in the bud fertility of the 'Superior Seedless', grafted on the 'Harmony' and IAC-766 'Campinas', and of the 'Crimson Seedless' and 'Thompson Seedless', grafted on the 'Harmony', in the conditions of the São Francisco Valley, Brazil. It was observed that the separately use of the products had not promoted significant differences in the studied of the bud fertility, but, the association of the growth retardants with the TDZ it induce the 'Thompson Seedless' to a bigger productivity, and that the expression of the bud fertility of the 'Seedless Superior' benefits on to being grafted on the 'Harmony' rootstock.

To study plant growth and yield of cauliflower, two field trials were carried out: the first springsummer (Oct. 07, 2006 to Jan. 28, 2007) and the second autumn-winter (Apr. 04, 2007 to Jul. 09, 2007). The experimental design was randomized complete blocks in 4 x 4 factorial design with three replications. The following factors: line spacing (0.6, 0.8, 1.0 and 1.2 m) and plant spacing (0.4, 0.5, 0.6 and 0.7 m). The used cultivar was cv. Verona 284. The characteristics, number of leaves by plant, diameter of stem, diameter of inflorescence, inflorescence mass and yield were evaluated. With the reduction in spacing, were observed lower numbers of leaves, stem diameter, diameter and mass of the inflorescence, but there was an increase in yield. The maximum yield (23 t ha-1) was obtained with 0.6 x 0.4 m, ie, in higher plant population (41,667, plants ha-1).