This experiment was conducted in greenhouse nursery (50%) located in the orchard, Federal University of Lavras (UFLA) in order to assess the initial response of seedlings of cherry-the-woods to the effect of doses of single superphosphate. The design was a randomized blocks with four treatments, four repetitions and sixteen plants per plot. We used 4 doses of single superphosphate (0, 2.5, 5.0 and 10.0 kg/m3 of substrate). Thefertilization with the single superphosphate was made in the substrate, at the time of filling the bags for production of switches. We evaluated the characteristics: height changes (cm), the root length (cm), number of leaves per plant, dry matter of shoots, roots and the total (g / plant). There was a significant effect of doses of single superphosphate for all characteristics except for the length of root and dry root. Since the doses of 5.29, 10.0, 5.86 and 6.15 10.0 kg/m3 of the substrate that provided greater height (17.18 cm), number of leaves (9.85); dry of shoot (2.04 g) and total dry weight (2.76 g), respectively.

This work was carried out to evaluate the use of a hydrogel polymer in melon crop under different irrigation depths, with the objective of improve water retention, and efficiency of water and nutrient utilization by plants. One trial consisted of two treatments with four replications: a treatment with irrigation depth corresponding to 75% of gross depth and 27g of the soil conditioner per plant; the control with irrigation depth equal to the gross depth and without conditioner. The following characteristics were evaluated: root length, yield and quality of melon fruits. Root growth was bigger in the plants where soil conditioner was used. Use of soil conditioner provided an increase on melon yield and number of fruits per linear meter. Mean fruit weight and total soluble solids were not influenced by soil conditioner application and irrigation depth reduction.

The present work had the aim to study the seasonal variation of the groundwater quality for irrigated at Lagoa de Salsa region in the district of Tibau (RN) during in the rainfall and drought season of 2008 and 2009. Sample water 24 were collected in aquifer distributed spatially in produced area in region at the two stationsalong. The variables electrical conductivity, Na, Ca, Mg, SAR, CO3, HCO3 and Cl were analyzed. The results showed that majority of the groundwater for irrigation in the Tibau microregion have use limitation. The concentrations for rain season was low in relation drought season, decreased salinity risk to mayoral parameters analyzed.

The human specie has always been developing and improving its ways of exploring the natural resources. Among these ways, farming stands out for including various activities which are moving according to the time and space where they are implemented, which makes necessary to consider and study farming as a system. In this work, the concept of farming system was set up, showing that it is formed of several parts that interact with each others and with external components, generating a dynamic. To facilitate the comprehension of the current farming systems in the semi-arid northeast of Brazil, a revision of the evolutionary paths of these systems was done, considering livestock like a subsystem of the sugarmills, and of its importance in the economy and culture of the northeast. Observations about the fragmentation of the land and the appearance of systems of family production were also conducted. This study draws the conclusion that besides the physical characteristics of the area, some socio-political and economical factors have influenced a lot the way in which the farming systems were constituted in the semi-arid northeast.

A synopsis of the species of Euphorbiaceae from the National Park Serra of the Itabaiana, state of Sergipe is presented here with information about their geographic distribution, key of identification, synonyms, and habitats. The family in the Park is represented by 24 species distributed among 11 genera.

Erosivity is the potential ability of rain to cause erosion on somewhere. With the objective of mapping the rainfall erosivity in the entire State of Pernambuco, the average monthly values of the EI30 index with were correlated with Fournier rainfall coefficient and the average monthly precipitation, as well as the yearly values of the index EI with average yearly precipitation values. Data from 11 localities representative of their distinct climatic regions were utilized. From the best regression equations found for each region, the average yearly values of the EI30 index were calculated ( Factor R of Universal Soil Loss Equation - USLE) for 96 localities in the State, based on periods of 14 to 75 years of rainfall records. The values of erosivity found varied from 1,500 to 10,000 (Mj mm ha-1 h-1 year-1), where the Zona da Mata, Agreste and Sertão regions presented a moderate erosive potential, with values from 1,500 to 3,500 (Mj mm ha-1 h-1 year-1). The litoral region, was characterized by high erosivity, with annual average values of the index EI bethween 5.500 to 10.000 (Mj mm ha-1 h-1 year-1).

Metarhizium anisopliae var. anisopliae and Metarhizium flavoviride var. flavoviride are entomopathogenic fungi with proved action against several species of insects. In this work, the behavior and cytology of the M. anisopliae var. anisopliae (PL43) and M. flavoviride var. flavoviride (CG291) were evaluated after the passage in eggs, larvae and adults Chrysomya albiceps, an important causer of secondary myiais. The experiment was carried out under an acclimatized environment's humidity and temperature of 60 ± 10% and 28 ± 1oC. The most expressive results of the biological parameters studied (percentage of germination, quantity of conidia, quantity and diameter of colonies) were reached from re-isolated fungi of larvae. No significant differences were observed in the cytological aspects of the life cycle of the fungi post-passage in eggs, larvae and adults. These results suggest the possibility of the use of the fungi in the control of C. albiceps fly.

A field experiment was carried out at the UFCG/CSTR Experimental Station NUPEARIDO in order to evaluate the influence of organic and mineral fertilization on pearl millet (Pennisetum glaucum L.) production. After plot demarcation, macassar bean was sown and incorporated in the soil in the respective plots after x days of plant development. Treatments were control, green manure, NPK, cattle manure or goat manure, with four replications, totaling 20 plots, each one with 8 m2 of net inner area. Pear millet plants were grown in a 0.8 x 0.4 m2 grid. Cattle or goat manure was applied at a rate of 3.4 kg m-2, green manure at a rate of 12.5 kg plot-1, and the mineral source consisted of 25.2 g m-2 of ammonium sulphate, 22.2 g m-2 of single superphosphate and 3.3 g m-2 of potassium chloride. Plants were cut 60 days after seeding to evaluate N, P, K, Ca, Mg, S, B, Fe, Cu, Mn, and Zn accumulation. Fertilization with cattle or goat manure promoted more nutrient accumulation pearl millet plants.

This experiment aimed to objective evaluate the appearance of the fruits and taste of waterde-coconut during the storage. Were harvested fruit cultivar Green Dwarf with six months of age, from the municipality of Rio do Fogo-RN then were transported to the laboratory Agriculture of UFERSA, which were previously assessed on the appearance of the fruits and taste of water. Part of the fruit has been coated with paraffin, and the other part remained untreated. Then, the fruits were stored in cold with temperature of 12±1ºC e 90±2% UR. Where they remained for 28; 35; 42; 49; 56 e 63 days. In each period the fruits were evaluated on their appearance and taste of the water using a hedonic scale of nine points, ranging from extremely liked and disliked. The experimental design was completely randomized, factorial arrangement 2x6, two types of coating fruits (fruits with and without paraffin), six times the storage of fruits (28, 35, 42, 49, 56 e 63 dias) with three replicates of 05 fruits, was used to test Friedman average of a 5% probability. The coating with paraffin kept good appearance of the fruits for a longer period of time in relation to fruit without paraffin. The taste of the water, practically, did not differ with the coating fruits.

The study aimed to evaluate the effect of two doses of organic material in the nutrition of tomato (Lycopersicon esculentum), cv Santa Cruz, grown in pots in an Oxisol Ultisol Distrocoeso the municipality of Rio Largo - AL. The design was in randomized blocks in factorial 2 X 4 (two and four fertilizer doses) with 5 replicates. The experimental unit consisted of a vessel with capacity for 12 dm3 containing 15 kg of soil. The fertilizer materials were: 1 fertilizer - manure from corral + chicken manure + fertilizer and the filter cake of 2 - to corral manure + chicken manure + sugar cane bagasse, in doses 0, 5, 10 and 15 t ha-1. The applications were split in the following way: 10% at the time of transplantation, and 15% at 20, 34, 48, 62, 76 and 90 days after transplanting (DAT) in coverage. The seedlings were produced in the tomato seed, on March 10, 2008, in polystyrene trays with 128 cells, after transplantation and were selected for the vessel on April 02, 2008, leaving two plants per pot . The plants were conducted in mentoring and single stem, and where, therefore, all cultural and treatment plant. There was a collection of leaves 4 + from the apex of the plant, to assess nutritional status at the beginning of flowering. Among the nutrients, the nitrogen was absorbed the most, followed by: potassium, calcium, sulfur, magnesium and phosphorus, whereas among the micronutrients, in increasing order of absorption was the following: boron, zinc, copper, manganese and iron. According to analysis of variance and regression analysis of the fertilizer did not affect the levels of nutrients in the plant, with only difference between the doses.