The Grass, have high relation for C / N and a fascicule root system, is an alternative for use in the system of tillage (SPD) in northeastern Brazil. This work had the objective to assess the effects of three plants and grass cover on the components of production of the corn crop in no-tillage system and accumulation of biomass of their grass. The design was randomized blocks with four replications, with each plot area of 112 m2 (5,6 x 20,0m). The treatments consisted of the corn cultivation, DKB-333-B, about three grass species (Brachiaria decumbens, Brachiaria humidicola and Tifton in the system of tillage and a witness, without vegetation. The B. decumbens provided higher income to the corn crop, producing 5708 kg ha-1, didn't differ of the witness. The use of grass as cover plants are a viable alternative to the SPD of the corn crop, adding value by producing two crops (corn and grass), and protect the soil against erosion and produce forage for ruminants during the between-season .

This work was carried out at Mossoró-RN, Brazil, to evaluate the effect of the increase of water irrigation salinity level on melon fruit quality. During two production cycles four irrigation water salinity levels were applied to the plots (S1 = 0.6, S2 = 1.9, S3 = 3.2 and S4 = 4.5 dS m-1), both continuously or being increased at different stages of development. This scheme resulted in 15 treatments arranged in an entirely randomized blocks design with four replications. Effects studied were the salinity levels, the stage of development in which they were applied, and storage time of fruits. Variables pulp fruit firmness, total soluble solids, fruit juice electrical conductivity (CEf), pH, and fruit weight loss were not affected by salinity levels, neither when used continuously nor when it was increased at different development stages. Water salinity levels did not affect fruit quality variables neither when analyzed on harvest day nor 35 days after harvest, except for CEf that, on harvest day, increased linearly with the increase in water salinity level.

Aimed to study the floristic composition of the shrub-tree layer in the areas in Caatinga baiana, Brazil. The study was made being used in each area 100 contiguous parcels of 10 x 10m. The collected material was deposited in the herbarium Jaime Coelho de Morais of UFPB and through consultations in specialized literature. They were registered in Senhor do Bonfim 1.793 individuals distributed in 52 species and 23 families. In the area of Jacobina were presented 1.961 individuals which were distributed in 62 species and 24 families. In Senhor do Bonfim, the families with larger number of species were Euphorbiaceae, Leg. Mimosoideae, Malvaceae and Rubiaceae. In Jacobina they stood out: Euphorbiaceae, Leg.Mimosoideae, Myrtaceae, Cactaceae, Leg. Caesalpinoideae, Malpighiaceae and Malvaceae. It was observed it influences her predominant of six species in the community of both areas. The analysis of similarity florística indicated that for the two areas the similarity was very low. It was verified that the studied areas presented composition varied floristic.

The agriculture soil in the semi-arid Brazilian Northeast, it finds, in many areas, degraded by the utilization of not sustainable practice. This work proposed to evaluate the effect of increasing NaCl levels in the soils under Spondias tuberosa plants colonized with arbuscular mycorrhizal fungi. Under greenhouse conditions, Spondias seeds were going placed to germinate in trays with mycorrhizal soil and in trays with soil autoclavado. The germination occurred 15 days after the planting and in the 30th cultivation day, the plants were going transferred to plastic vases with capacity for 2 L of nutritious solution with the next NaCl doses: 0, 100 and 150 mM. They were monitored the transpiration rate and stomatal conductance until the plants introduced toxicity symptoms to the Na+. After the saline stress suspending, they were evaluated the N, P, K, S, Ca, Mg, Na and Cl contents in the drought matter of the aerial part (stem + leaves) and root. It was going observed the reduction in radicular phytomass and aerial in NaCl first-level regarding the control. Stomatal conductance in plants not micorrizadas was equally reduced. In the root, it was observed significant reductions in Ca, K and Mg contents for the mycorrhizal plants and not mycorrhizal. In the leaves, the increase of NaCl dose induced a substantial reduction in the Ca, Mg and N contents and probably it was caused the reduction in the mass drought production.

The objective of the present work was to characterize melon plant accessions collected in the Brazilian Northeast. They were appraised 42 accessions and four you cultivate commercial, in the years of 2006 and 2007, in twoexperiments in randomized blocks with two replications. 24 traits were used, being 1 of the seed, 11 of fruits, 7 inflorescência, 4 of the leaf and 2 of the plant. The accesses belonged to the botanical group Cantalupensis, Momordica, Conomon and not defined group. Great variation was observed among the accessions for all the traits, especially in the fruit descritores. Variation was verified among and within of the studied botanical groups, mainly in the group Cantalupensis. In a general way, the accesses were fruitful, productive, with long fruits of intermediate size the big ones, with low pulp firmness and lower content of soluble solids. The characterization of the accessions with relationship to the fruit traits can aid the improvement programs. Some accessions can be used to increased the fruitful and the productivity of the melon through crossings with elite cultivars.

This study aimed to provide options of cerrado fruitful tree for neighborhoods to the outskirts of Goiânia, Brazil building up the level of satisfaction of the residents in relation to current local urban landscaping. The choice has been to work with fruit due to the large number of these species in the cerrado needing to preserve the existing genetic variability and protect the local flora. Data was collected through 100 questionnaires, from simple random sampling. It was observed that 53% of respondents were classified as partially satisfied with the landscaping where live, 27% dissatisfied, 10% satisfied, 7% and 3% very satisfied totally dissatisfied. Most people never planted fruit tree, however, 87% would like fruit were planted, indicating that the absence or disability of urban arborization is not a result of predation or popular unrest. It was found that 87%do not have allergies to plants, 8% said they do not know and 5% have allergies, and interesting to give preference to trees with restricted flowering period of a few months. It was found that 93% prefer shaded street, thus, it is suggested the use of species with bulky crown and removed from public lighting. It was observed that 68% did not know or had access to proper pruning procedure to be adopted. The species most appropriate are Centrolobium tomentosum, Cassia ferruginea, Pouteria ramiflora, Dimorphandra mollis, Pseudobombax longiflorum, Inga Alba, Curatella American, Hancornia sXXXpeciosa, Alibertia edulis, Erythrina speciosa, Kielmeyera coriácea, Caryocar brasiliense, Minosa laticífera and Bowdichia vigilioides.

This work had the objective to assess the effect of different systems of soil management on the components of corn and Brachiaria decumbens production in the conditions of the coastal plateau of the State of Alagoas. The experiment was carried out in the Center of Agrarian Sciences of the Federal University of Alagoas in the year of 2006, in a Yellow Latosol (Oxisols) Cohesive dystrophic soil. The treatments used were: usual preparation system (SPC); minimum cultivation (SCM); direct plantation (SPD) and farming-cattle integration (ILP), this one joined with B. decumbens. The hybrid of maize BRS 3003 was used whose variable had been: number of plants ha-1 (PP), length of spikes (CE), number of row grains on spikes-1 (NF), number of spike (NE), mass of 100 grains (M100) and grain yield (PG); and fresh weight (MN) and dry weight (MS) of the B. decumbens. The results showed that the soil management systems influenced the PP, NE and PG, but not the variables CE, NF and M100. The treatments ILP and the PD were the most promising management systems. In system ILP, the accumulation of MN and MS did not have influence in the production of corn grains, representing an interesting food source for farm animals.

The culture of the castor bean comes as a promising alternative for the producing of the semi-arid Northeasterner, mainly for to present characteristics as adaptation to the climatic conditions and to present in seeds they nourish chemistries of addition importance for production of Biodiesel, however, they are still scarce studies on techniques handling of this culture, mainly as the manuring This work driven with the objective of evaluating the initial development of the castor bean submitted to different sources and doses of organic matter. The used design was it entirely randomized in factorial outline 2 x 5, with three replications. The treatments were composed by the combination of two sources (manure bovine and manure ovine) and five tenors of organic matter in the composition of the substratum (0, 10, 20, 30 and 40). The appraised growth indexes were: plant height, number of leaves, stem diameter and fitomassa of the aerial part. The castor bean answered the sources and the studied doses significantly, as well as the interaction among these factors. Answer was verified forms quadratic the doses of bovine and lineal manure to the doses of manure ovine. The largest development of the plants was verified with bovine manure, in close tenors of 30%.

Plague control is based almost exclusively on application of chemical substances, however these products are toxic to men and animals and cause odd effects on environment quality. In Plague Integrated Management (PIM), the use of selected insecticides and entomopathogenic fungi should be considered as one viable strategy for plague control in agriculture. This work aimed to evaluate, in laboratory, the compatibility of the entomopathogenic fungi Metarhizium anisopliae var. acridum and Metarhizium anisopliae var. anisopliae with the oil of Nim. The addition of the product was made to the potato-dextrose-agar medium still liquid (±45°C), in a way that the final concentration obeyed 50% of the producer's recommendation. After fungi inoculation, the dishes were incubated in a cimatized room at 28°C, photophase of 12 hours and relative humidity of 75±5% for 12 day period. The number of conidia per colonie was counted with a Neubauer chamber. Statistic delineament was entirely in random, with two treatments (PDA with insecticide), and a control group (PDA without insecticide), and 9 repetitions for each treatment. The results showed that the insecticide inhibited conidial production in Metarhizium anisopliae var. anisopliae strains when compared to the control group. The diameter of Metarhizium anisopliae var. acridum colonies suffered significative reduction in its size, compared to control. The tested insecticide, in the concentration and formulation used, presented compatibility with the tested strains.

The use of spontaneous species as green manure en the rocket production has been produce satisfactory results. The experiment was carried out at a greenhouse of Plant Science Department of the Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró-RN, in the period of 2008, with the objective of determing of different decomposition times of malva veludo rocket production. A completely randomized desings with six treatments and four replications. The treatments consist of: (7 days incorporated), T2 (incorporated 14 days); T3 (incorporated 21 days); T4 (incorporated 28 days); T5 (incorporated 35 days); T6 (fertilized soil). The evaluated traits were: plant height, number of leaves per pot, dry mass and yield. The time of decomposition of 14 days was what provided the best rocket production.