The study aimed to: assess the effects of plant densities in the behavior of genotypes of maize; Select the genotypes of greater adjustment and grain yield and better density of planting in the municipality of Rio Largo-AL. It was evaluated the genotypes: UFAL-1, UFAL-4, UFAL-5, UFAL-7, Sertanejo, Cruzeta and AL-30, and the densities: 55,555, 66,666, 77,777 and 88,888 plants.ha-1. Used randomized block design scheme in a split plot with three replicates. The plots (4 rows 18mx0, 9m) was formed by genotypes and the subplots (4.5 mx0 ranks, 9m) by densities, with one plant per pit. It was determined the variables: plant height and insertion of the 1st spike, the stem diameter, ear size and number of rows of grain in ear, index of ears and yield. The density of planting of 55,555 plants.ha-1 improved performance in the variables, plant height, diameter of the stem, size of the ear, index of spike and grain yield in genotypes; Genotypes AL-30 and UFAL-4 outperformed the others in grain yield; Low correlation of the variables studied with the yield; Lack of water during the flowering to maturity of the grains meant that the genotypes expressing its full potential.

The current work had the objective to evaluate the effect of Hydropriming about the germination and emergence of seeds of cucumber, ordering improve the velocity and informing of this. The tests was conduced in the laboratory of Analysis of Seeds and Didactic Garden of Department of Plant Sciences of Universidade Federal Rural do Semi-Árido - UFERSA, in the period of September to October at 2009. For this, it was utilized seeds of cucumber cultivate Aodai, with four replications for next treatment (demonstration, Hydropriming and Hydropriming + drying). The seeds was hydroconditioned in towel-paper, in 20 ºC, until culminate 42,8% of humidity. Later were drying in ambient temperature of laboratory (28-30 ºC) and 45-55% of relative humidity, until hit moisture of 7,3%. The seeds was evaluated for tests of germination, velocity index of germination, first count of germination, aerial part length of seedling and aerial part dry matter mass. The statistical analysis was effectuated separately for next feature evaluated, determining the effects of treatments in completely randomized design, being the comparison of means out Tukey test in level of 1% of probability. Though the Hydropriming with or out drying promote benefit effects about the emergence of seedlings, aspect relationship of establish of stand, the technical needs of improvement for specie, given in necessity of adaptation of methodology of priming.

Knowledge of the speed of infiltration of water into the soil is of fundamental importance to define the methods of soil conservation, planning and design of irrigation systems and drainage. In order to study the speed of infiltration of water into a OxiLatossoil, before the system management tillage applying different empirical models, this work was conducted Centro de Ciências Agrárias, at the Federal University of Alagoas (CECA - UFAL), in order to evaluate the behavior of the equations of Kostiakov, Kostiakov-Lewis and Horton which Were used to estimate the Water infiltration rate in studied soil by using simple the soil under study, using a simple ring to evaluate the infiltration of water in the field. It was then that the system on the equation that more fit the model of the simple ring infiltrometer was to Kostiakov followed the model of Horton.

This paper was developed on partnerships between association of milk producers in Catingueira, Paraiba States to characterize the socioeconomic profile theses farmers. Interview with 11 farmers using semi-structure questionnaires showed 72.7% were farmer with lesser areas 100 ha, low educational level and utilizing labor family and 18.2% not had veterinary assistance. The majority farmers not did forage storage and not did utilization of mineral salt to diet animals. All farmers had PRONAF credit but not systematical technical assistance to definition of strategical program of intervention.

The Myracrodruon urundeuva Fr. All. specie is known like aroeira-do-sertão, it belongs to Anacardiaceae family and it can be found in the Caatinga, Cerrado and Pluvial Forest. In the present study was tested on aroeira-do-sertão the water deficit effect under greenhouse conditions in two experimental blocks: the daily irrigation and the other with water deficit. It had tested with four repetitions by treatment and in three point of stem: basal, intermediary and apical. It was registered the data about photosynthesis rate, transpiration rate, stomatal conductance, relative water content and leaf protoplasmatic tolerance. The water deficit produced increment in relative water content in the leaves at the all positions leaves through the stem and reduced the transpiration and photosynthesis rates in the plants. The apical leaves were the most sensitive to the variations of the ambient. When the aroeira-do-sertão leaves were exposured to high temperature, they presented protoplasmatic tolerance mostly in the leaves located at intermediary position in the stem whose growth is complete.

It has been recorded that alternative techniques used to keep the product on and control plagues countwith a concept that is getting better day by day. It is a chilling process of grains. Therefore, a freezing unit was used in order to cool the environmental air before injecting it into the aeration system of the structure that stores the product. This is an strategy applied to reduce the grains¿ temperature to such low values that it can inhibit or even avoid the bugs¿ development, also despite the climatic conditions.. This trial was carried out in a storing Plant from a cooperative named CONTRIGUAÇU, in Palotina-PR, from November, 28th to December, 23th , 2003. Three experimental silos were used. The first one with 5,000 tons static capacity, while the others capacity was of 2,500 tons each. The concluding results showed that the layers reached a final chilling temperature in sequence, which means that, when the first one got into this point the same happened to the next ones. This result points out the existence of a chilling zone that takes part of the inner part of the grains as time passes by due to the temperature gradient among the temperature of the product, the chilling air temperature and the flow of air supplied by the equipment. The specific consume of energy was of 5.12 kW.h/ton of wheat to the first silo and of 4.48 kW.h/ton of wheat the the other ones. It was also recorded the chilling cost, which was of R$ 0.53/ton of chilled wheat.

The evaluation of the effect of seed has been fundamental tool in the program of quality control, and the accelerated aging test, an important part of that process. Some authors report that the germination and vigor are associated with seed size and facing the lack of consensus for the use of this test methodology and the relationship of seed size on the physiological quality, this work aimed to adapt the existing methodology as the temperature and period of conditioning on the performance of two sizes of seed cotton. The seeds were classified into two meshes of sieves, and then subjected to tests of water content, germination and electrical conductivity. The experimental design was completely randomized, analyzed statistically in a factorial threefold. Seeds of different sizes, showed no difference in percentage of germination. Seeds subjected to 40 º C for 42h of conditioning showed better percentage of germination.

Jatropha curcas crop is raising attention as an alternative crop for oil and biodiesel production. Despite the mineral fertilization is an important factor for increasing Jatropha curcas yield, few research has been made on this issue, mainly on the use de zinc and copper. In order to evaluate the effects of these elements on Jatropha curcas plant growth two experiments were carried out in a greenhouse, in Campina Grande, Paraiba State, Brazil, from July to December 2007. The substrate for the pot plants was a 5 mm-sieved surface soil (Neossolo Quartzarênico). The experimental design was a completely randomized with three replications. The treatments of first and second experiment were composed of five levels of Zn (0; 2; 4; 6 and 8 mg dm-3) and five levels of Cu (0; 1; 2; 3; and 4 mg dm-3) which were applied at the time of planting. One plant of Jatropha curcas was grown per pot after thinning and was irrigated whenever necessary. Data on plant height, number and length of leaves and stem diameter were measured at 40; 60; 80; 100 and 160 days after planting. Under conditions that the experiments were carried out the Zn and Cu levels used did not affect the Jatropha curcas plants growth.

Cotton seeds require special care during storage to maintain their physiological and sanitary quality. The present work evaluated the physiological and sanitary quality of seeds of three varieties of herbaceous cotton stored for three (Lot 1) and twelve months (Lot 2). Analyses were performed in the Laboratório de Análise de Sementes e de Fitopatologia of the Centro de Ciências Agrárias, Areia-PB, and included tests for: emergence (E), vigor (IVE), green weight (PV), dry weight (PS) and the "Blotter test". Tests for physiological quality were performed in a randomized manner using a (3x2) factorial scheme, with four replicates with 25 seeds. Data on sanitary quality are presented according to the fungus index expressed as percentages. Seeds of the varieties CNPA 7H and BRS Verde demonstrated good levels of emergence after up to 12 months of storage, while seeds of the variety BRS Verde initially demonstrated dormancy, although this was overcome during storage. The fungus most commonly observed among the seed varieties in both storage lots was Rhizopus sp. The variety Aroeira do Sertão demonstrated the greatest incidence and variety of fungal species, a large majority of which were classified as storage fungi.

The effects of the fertirrigation were evaluated with in nature vinasse on to microorganism of the soil. The soil was treated with three levels different from in nature vinasse (equivalent to 200, 400 and 600m3.ha-1), withhumidity maintained around 70% of c.r.a.. Para isolation and count of the total microorganisms (bacterias, mushrooms and actinomicetos) and microorganisms celulolíticos were used the methods of the dilutions in series. The population of mushrooms had a significant increase with addition of the level of in nature vinasse of 200m3.ha-1, and the population of bacterias only obtained increase starting from the 120 days of incubation, tends larger growth in the level of vinasse 600m3.ha-1. The number of actinomicetos of the soil had a significant reduction in all the levels standing out the one of 600m3.ha-1, already with relationship to the population of microorganisms celulolíticos an increase of in nature vinasse 200m3.ha-1 was verified.