To have high yields it is necessary that seed of good quality be sowing and, to produce them, mother plants should receive appropriate treatment, like fertilization. Aiming evaluate how copper and zinc fertilization, in three types of soil, and its influence in physiological quality of sorghum seeds, in an experiment in randomized blocks with tree replicates. The treatments were a combination of five levels of Cu (0,0; 0,26; 0,90; 1,54; 1,80 mg kg-1 of soil) and five levels of Zn (0,0; 0,32; 1,10; 1,88; 2,20 mg kg-1 of soil), resulting in nine treatments in experimental matrix Central Box. Seeds produced were analyzed of hundred seed weight, germination and vigor (germination first count, IVG, emergence, emergence first count, IVE and seedlings dry matter). The levels of copper and zinc increased hundred seed weight and vigor tests. Plants cultivated in Haplustalf produced seed with the best quality.

The experiment was carried out to determine the effect of intermittently drain tilapia ponds for vegetable irrigation. A completely randomized design in a factorial arrangement 2X3, with three replications was used in this experiment. The first factor was kind of feed: feed 1 - without animal ingredients; feed 2 - with the inclusion of shrimp meal; and feed 3 - with the inclusion of fish meal. The second factor was pond drainage scheme, where in the scheme 1, ponds were intermittently drained for irrigation and subsequently refilled; and in the scheme 2, ponds were not drained. Sexually reversed Nile tilapia (Oreochromis niloticus) with average weight of 1.66 g were randomly stocked at the experimental ponds, with thirty five fish per tank, in a stock density of 1.25 fish per m2. Fish were fed two times a day in a proportion of 5% of body weight. There was a significant effect for tank drainage scheme for the variables feed conversion ratio and survival (P<0.05) where tilapias cultured on ponds intermittently drained for irrigation had higher survival and better feed conversion ratio. There was no significant effect (P>0.05) on the interaction between kind of feed and tank drainage scheme for any of the studied variables. Feed type and pond drainage scheme had no effect on weight gain (P>0.05). Therefore, it can conclude that intermittently drained fish ponds, for irrigation, results in the best tilapia's performance in terms of feed convertion and survival.

The experiment was conducted at "sitio cantos" of UFERSA, to evaluate the green mass production and the effect of the cut age (42, 56, 70, 84 and 98 days) on chemical-composition of the canarana erecta hay, cultivated in semi-arid climate area. The DM, CP, OM and ashes levels were affected by treatments. The age of 42 days presented production of green matter (45,88 ton/ha/year), and the CP (6,64%), EE (2,15%) and ash (14,08%) levels superior to the other ages, being therefore the more indicated for haymaking.

The design of a lateral line was an applied tool with the objective of determining, accurately, the lateral line final pressure, considering the presence of a hydraulic cannon or not in the final extremity of the piping; so that the irrigation planner has the exact science of the entrance pressure in the central pivot. Being able to like this, design projects more optimized in terms of energy. The evaluation of the system provided the rebuilding of the curve of control of the equipment taking to the producer the reality of his/her overhead irrigation. The hydraulic project of the system provides the visualization of the theoretical behavior of the system that, when compared, to the real behavior, position in execution, it can serve as auditing for ends of correction of the possible flaws, be of project and production or of execution.

O objective this work was to estimated genotypic, phenotypic and environmental among traits of melon. Six hybrids of melon and their fifteen populations in diallel crosses were evaluated in a randomized complete block design with three replications. The traits assessed were yield, number total of fruits, average fruit weight, longitudinal diameter, transversal diameter, pulp thickness, pulp firmness and soluble solids content. The correlations between yield and total number fruit and yield and average fruit weight were positives. The total number exhibited negative correlation with average fruit weight and solids soluble content. The correlations of the solids soluble content with average fruit weight, pulp thickness and pulp firmness ware positives. However, pulp firmness and pulp thickness exhibited association negative. The undesirable associations detected in the present work were not sufficiently strong, indicating that is possible to obtain recombinants individuals in the segregating populations evaluated.

The work was conducted in two environments of caatinga, occurring in the Moacir Lucena accomplished, Apodi - RN. 12 plots have been demarcated 10 x 20 m, randomly distributed in each environment, characterized as follows: Area I - managed area and Area II - area of legal reserve of Accomplished. In each plot were sampled all individuals with CAB ¿ 10 cm. In Area I were sampled 130 individuals, five families and eight species, while in Area II, 244 individuals, four families and seven species. The Mimosoideae and Boraginaceae families are highlighted by number of individuals. Caesalpinea bracteosa presented greater number of individuals in the environment I and Auxemma glazioviana the environment II. The environment I made highest diversity of the Shannon- Weaver (H'), 1,10. In the environment I Caesalpinea bracteosa and Auxemma glazioviana were the species that showed higher frequencies, densities and dominances relatives, index of importance and value of coverage. Auxemma glazioviana presented highest density, dominance, frequency, IVC and IVI in the environment II. In the environment I most individuals presented stem diameter of between 11 and 21 cm, while the environment II, less than 11 cm.

The effects of five levels of nitrogen (N) fertilization (0; 60; 120; 240 and 480 kg of N/ha) upon Buffel grass (Cenchrus ciliaris, L.) performance were evaluated. A completely random design with three replicates was used. Dry matter yield of aerial portion (DMYAP), dry matter yield of roots (DMYR), leaf/stem ratio (LSR), number of tillers (NT) and water use efficiency (WUE) were measured. The results showed a linear effect (P < 0.002) on DMYAP and DMYR and linear and quadratic effects (P < 0.02) on NT and WUE. LSR was not influenced by the nitrogen fertilization. Overall, it could be concluded that Buffel grass responded positively to nitrogen fertilization.

To evaluate the effects of fiber level and source in diets on the intestinal morphology and histology of duodenum, jejunum and ileum medium portions, it used 40 rabbits New Zealand White race in growing phase, weaned with 35 days of age, allocated in individual cages in the entirely randomized design with 2x2 factorial outline. Samples of duodenum, jejunum and ileum of animals slaughtered at 45 days of age were collected to the present study. It was observed significant interaction of the dietary treatments on the intestinal morphology and histology parameters, being verify that diets with high e low level of fiber with soybean hulls propitiated the greater values of villus height and those diets with high e low level of fiber with alfalfa hay propitiated the bigger values of crypt depth, while the number of goblet cells was larger to the diet with high level of fiber contained soybean hulls. And so there was significant effect of the food quality in terms of fiber components on the extrusion and turnover in intestinal mucous membrane cells, it was evidenced by the greater villus height:crypt depth ratio provided with the diets contained soybean hulls in relation to those diets contained alfalfa hay.

In many areas irrigated of the world, water supply of good quality not be enough for the maintenance of the irrigated agriculture, or your cost be elevated, seeking itself alternative with water use of the underground or even of drainage. Generally, these waters are not of good quality and they need to be well managed to avoid the degradation of the soils and damages to the plants. This work objectified evaluate the composition of lixiviate in four soils of Rio Grande do Norte, irrigated with waters of increasing levels of electric conductivity (EC) and sodium adsorption relation (SAR). This work aims to evaluate Assu/Mossoró, RN, agricultural production center soil degradation under irrigation with increasing electrical conductivity (EC) levels, and sodium adsorption rates (RAS), when cultivated with cantaloupe. The work was conducted in a greenhouse at the Environmental Sciences Department of Semi-Arid Rural Federal University. Four soil types, traditionally used for cantaloupe production, were used and irrigated with solutions corresponding to eight EC (EC = 100, 250, 500, 750, 1.250, 1.750, 2.250 and 3.000 ¿S/cm) and two SAR (SAR = 4 and 12) levels, as salinity treatments, corresponding to the irrigation waters used in the Northeast, with low sodification risk, especially in the studied area. So the experiment was a factorial arrangement of 4 x 8 x 2 (four soils, eight EC and two SAR), with three replicates, on a randomized block design. They were evaluated pH and EC, as well as cations and anions soluble of each lixiviate collected of the 10 days after transplanted of the dumb. The use of leaching solutions promoted salt leaching in four studied soils, mainly at Cambissolo and Neossolo.The increase in the concentration of the percolates solutions promoted larger losses of salts, which were crescent with the time of leachate.

The objective of this experiment was to evaluate the reply of the scarlet culture (Solanum gilo Raddi) irrigated submitted the different applied doses phosphate in the plantation hollow. The used experimental delineation was of randomized blocks, being tested four levels of simple superphosphate (0, 1.000, 2.000, 3.000 kg ha-1). The phosphate fertilization in the plantation caused an increase in the following characteristics total of fruits to plant, commercial weight of fruits to plant, not commercial weight of the fruits to plant and productivity to fruits to hectare. The doses of phosphate that got a bigger efficiency to get a good productivity in the conditions of Cassilândia-MS, was of 1590 kg ha-1 of simple superphosphate that is the equivalent 286,2 kg of P2O5.