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Palavras-chave: Lycopersicum esculentum Mill., potencial de água no solo, ºBrix, pH. MOREIRA, J. A. A.; CARDOSO, A. F.; COSTA, L L.; RODRIGUES. M. R.; PEIXOTO, N.; BRAZ, L. T. IRRIGATION MANAGEMENT TO OPTIMIZE THE YIELD AND FRUIT QUALITY OF TOMATO CROP IN NO TILLAGE SYSTEM ABSTRACTThere is much information on the adequate soil water matrix potential for returning irrigation in conventional soil tillage systems; however there is not enough information on the best soil water matrix potential for no-tillage production systems. This work aimed to study the effect of five irrigation levels on yield, soluble solids, and fruit acidity of the Hypeel tomato, cultivated for industrial processing and cropped on no-tillage system in Yellow Latosol. The experiment was carried out on a randomized block design with five treatments and four replications. The treatments consisted in different soil water matrix potentials for returning irrigation (m at 13cm of soil depth): -15, -30, -45, -60 and -75 kPa. The results obtained showed that the soil water matrix potential of -28.5 kPa resulted in maximum yields for

ABSTRACT:The Agata potato is the most important economic sources of food in Brazil. However, fertilization for this crop has been carried out incorrectly, increasing production costs. Thus, the use of organomineral fertilizer reduces the amount of nutrient applied, facilitates the release of nutrients more slowly and brings improvement in the chemical, physical and biological attributes of the soil. The objective of this work was to evaluate the efficiency of organomineral fertilizers rates and comparate with mineral source on the potato crop in differents seasons. The experimental design was in randomized blocks, with five rates and four replications in the winter season. In the harvest of the rainy season the experiment consisted of 6 rates and four replications. Treatments were 1629.0; 2444.0; 3258.0; 4073.0; 4887.0 kg ha -1 of the organomineral fertilizer which equals 40; 60; 80; 100 and 120% of the rate in relation to the mineral fertilizer of 2800 kg ha -1 of formulation 03-32-06. There weren`t significant difference of the organomineral fertilizer in relation to the mineral in the total, commercial and special class of tubers in the winter crop. In the harvest of rainy crop, the average total productivity of potato tubers at all rates of organomineral fertilizer was 29 t ha -1 , which represents 22% higher than mineral fertilizer. The organomineral fertilizer presented agronomic efficiency for potato cultivation and could replace NPK mineral sources. The 4887.0 kg ha -1 organomineral rate generated higher total yield, commercial and special class of tubers.

The objective of this research was to evaluate the efficiency of different sources of residues in the composition of organomineral fertilizers on common bean yield. The experiment was carried out in a greenhouse at the Federal University of Uberlândia. A randomized complete block design was used in the 2 x 4 + 2 factorial scheme corresponding to two organic sources (biosolids and filter cake) and four doses of pelletized organomineral fertilizer (50, 75, 100 and 125% of the recommendation for common bean, plus two additional treatments without fertilization and fertilization with mineral fertilizer). The plant height and stem diameter were evaluated at 30 days after sowing (DAS), and an average number of pods plant-1 and grains pod-1, yield (g plant-1), dry mass (g), and mass of 1000 grains (g) at 84 DAS. The organomineral fertilizer based on biosolids fertilizer provides the largest growth with the use of 100% of the recommended dose, the largest volume of dry mass up to 75% and the highest yield at 50%. The organomineral fertilizer based on filter cake increased dry mass volume. The organomineral fertilizers evaluated have the potential to substitute exclusively mineral fertilization in the common bean crop.

The potato crop is very demanding regarding the presence of nutrients in the form readily available in soil solution and the climatic conditions to ensure satisfactory production of tubers. Each potato cultivar has specific characteristics for its development. The objective of this work was to evaluate the development and productivity of potato cv. Cupid, due to doses of fertilizers and the parceling of organomineral fertilization of the plantation and coverage compared to the use of the mineral. The experiment was conducted in the municipality of Perdizes, in Minas Gerais, in the harvest of 2014/15. The experimental design was in randomized blocks with a factorial scheme of 4 doses x 2 nitrogen managements + control treatment (conventional mineral dose) in 3 replicates. The doses of organomineral fertilizer were: 25, 50, 75 and 100% of the mineral dose of 600 kg ha-1 of potassium sulphate, 850 kg ha-1 monoammonium phosphate, and 300 kg ha-1 of ammonium sulphate. The management of the fertilization consisted of the achievement or not of the coverage that was made at 19 days after planting (DAP) along with the hilling. At 36, 54, 64 and 81 DAP, collection of plants was performed for the characterization of potato growth. No differences were observed between the doses of organomineral fertilizer as well as in the management of coverage in relation to the use of the mineral. However, the dose of 75% of the organomineral fertilizer with the realization of coverage provided better physiological response of the plants in relation to the accumulation of dry mass.