<p>Este trabalho teve como objetivo avaliar os parâmetros físico-químicos de polpas de fruta produzidas e comercializadas na cidade de Petrolina-PE, tendo como referência a Instrução Normativa nº 1, de 7 jan. 2000, do Ministério da Agricultura que define as características físicas e químicas estabelecendo limites mínimos e máximos específicos para cada polpa de fruta. Foram avaliadas duas marcas (1 e 2) de polpas de abacaxi, cacau, caju, graviola, maracujá e umbu, analisadas quanto aos parâmetros de pH, sólidos solúveis totais (SST), acidez total titulável (ATT), ácido ascórbico, relação SST/ATT e sólidos totais. Os resultados permitem inferir que a marca 2 apresentou qualidade superior na maioria dos parâmetros avaliados quando comparado com a marca 1. Entretanto para alguns sabores de polpa as duas marcas não atenderam os valores padrões. Entre as polpas o único sabor que apresentou os padrões exigidos foi a polpa de caju em ambas as marcas, e a que apresentou resultado de pior qualidade diante dos padrões foi a polpa de maracujá principalmente da marca 1. Dessa forma constata-se que há grandes variações entre as marcas, e entre alguns parâmetros, o que compromete a qualidade das polpas, prejudicando assim o consumidor.</p><p align="center"><strong><em>Physicochemical parameters of fruit pulps produced in Petrolina – PE</em></strong></p><p><strong>Abstract</strong><strong>: </strong>This study aimed to evaluate the physicochemical parameters of fruit pulps produced and marketed in the city of Petrolina-PE, with reference to the Instruction Nº 1 of 7 January 2000 of the Ministry of Agriculture, which defines the physical and chemical characteristics setting minimum and maximum limits specific to each fruit pulp. We evaluated two brands (1 and 2) of pineapple, cocoa, cashew, soursop, passion and umbu fruit pulp, analyzed for pH, total soluble solids (TSS), total titratable acidity (TTA), ascorbic acid, TSS / TTA and total solids parameters. Results show that the brand 2 showed superior in most evaluated parameters when compared to the brand 1. However, for some pulp flavors of both brands did not reached the standards values. Among the pulps, the only flavor that presented the required standards was the cashew pulp in both brands, and presented the results of lower quality on the standards was the passion fruit pulp mainly brand 1. Thus, it appears that there are great variations between brands and between some parameters, which compromises the quality of the pulp, thus impairing the consumer.</p>

-Adequate fertilizing management is crucial to reach high mango yields that demand a well-defined fertilizer management, including micronutrient such as boron which management is more difficult due to the narrow range between deficiency and toxicity. This way, an experiment was carried out to evaluate the fruit production and quality of mango cv. Palmer as a function of boron fertilizing management in Brazilian semiarid. The experimental design was in randomized blocks with six treatments (strategies for boron fertilizing), as follows: T1 = five sprays with H 3 BO 3 (two first at 0.3% and three at 0.2%); T2 = five sprays with H 3 BO 3 (two first at 0.3% and three at 0.4%); T3 = five sprays with H 3 BO 3 (two first at 0.3% and three at 0.6%); T4 = two sprays with H 3 BO 3 at 0.3% + three fertigations with 10 g of H 3 BO 3 plant -1 ; T5 = two sprays with H 3 BO 3 at 0.3% + three fertigations with 20 g of H 3 BO 3 plant -1; and T6 = two sprays with H 3 BO 3 at 0.3% + three fertigations with 40 g of H 3 BO 3 plant -1 . Boron fertilizing management (foliar spray and fertigation) affects fruit production and quality of mango cv. 'Palmer' grown in semiarid. According to the minimum quality criteria required for mango fruit commercialization and the fruit production per plant in semiarid, five sprays with H 3 BO 3 [two first at 0.3% and three at 0.2%] could be recommended.

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O Brasil foi o primeiro país da américa a cultivar a mangueira, e dentre as variedades mais cultivadas no nordeste têm-se a espada, esta é uma fruta que possui uma grande aceitação no mercado. A secagem de produtos agropecuários destaca-se como um dos meios de conservação mais promissores quando feita utilizando energia solar por ser um recurso barato, limpo, gratuito e abundante no Brasil. Diante do exposto, o objetivo deste estudo foi, avaliar a eficiência de um secador solar de baixo custo, para a secagem da manga cv. ‘Espada’ e os atributos do produto final obtido, visando levar esta tecnologia de baixo custo para o pequeno produtor, gerando mais uma fonte de renda. Para isso, as mangas foram submetidas à secagem solar e o fruto desidratado foi analisado quanto aos parâmetros físico-químicos: acidez, pH, sólidos solúveis, umidade, sólidos totais, vitamina C e de cor (L*, a* e b*). Os resultados demostram que a secagem solar na obtenção de manga-passa é uma alternativa viável, que proporciona um incremento nutricional e uma coloração mais atrativa ao produto, minimiza as percas pós-colheita, além de ser uma tecnologia com alto potencial para melhorar a renda dos agricultores familiares.

Analysis of the relationship of oat grain chemical components with productivity can yield information that determines crop production strategies. The market values high protein grain, but production and other nutritional components may be affected in the effort to increase protein levels. The objective of this study was to determine how the dynamics of the components of oat grain chemical composition relate to productivity when adding nitrogen to the soil, in order to develop nutrient management strategies that can combine productivity with grain quality. The study was conducted from 2011 to 2016 in Augusto Pestana, Brazil, in a randomized block design with four replications in a 4x2 factorial design for nitrogen rates (0, 30, 60 and 120 kg.ha-1) and standard biotype oat cultivars used on a commercial scale (Barbarasul and Brisasul) in two succession systems soybean/oat and corn/oat, totaling 64 experimental units. The nitrogen doses were applied at the phenological stage of expanded fourth leaf using urea. The increase of nitrogen fertilization for topdressing promoted increase of the total protein of oat grains and reduction of the total fiber in both soybean/oat and corn/oat systems. Higher levels of grain protein due to nitrogen fertilization reduced grain production, regardless of the cropping system.

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We evaluated the efficiency of three mechanical detasseling methods on the production of hybrid maize seeds. The experiment was run in the crop season of 2016/2017 in Indianópolis, MG, Brazil. The design used was random blocks, where the treatments corresponded to three detasseling methods: Puller (PUL)based on only one mechanical detasseling operation, Cutter 2x + Puller (C1P)-based on two mechanical detasseling operations by the Cutter method and one operation by the Puller method, and Cutter + Puller (C2P)-based on only one operation by the Cutter method and one operation by Puller. There was variability in the effects and efficiency of the mechanical detasseling methods in the production of hybrid maize seeds. The two methods C1P and C2P had small differences; both being superior to PUL. The mechanical detasseling method based on one operation of Cutter and one operation by Puller method is recommended, since it minimizes costs, lowering transfer and genetic contamination as well, and it optimizes the production of hybrid maize seeds per plant and unit area.

There is little information available concerning the effects of different sources and levels of phosphorus in the soil on lettuce quality and production. To help determine an optimal strategy, we used complete randomized blocks, in a 2x3x5 factorial experimental design, with two commercial lettuce cultivars widely used in Brazil (Americana (iceberg lettuce) cv. Lucy Brown and Crespa (leafy lettuce) cv. Vanda) fertilized with one of three phosphate sources [MAP, Polyblen or Triple Super Phosphate (SPT)], at five concentrations (0, 250, 500, 750 or 1000 kg of P 2 O 5 ha-1), with three replicates planted on a farm in Mineiros, GO. The variables stem height, head diameter, number of commercial and non-commercial heads and commercial fresh weight, were analyzed at 40 days after planting. There was a triple interaction for these factors, when their averages were broken down to qualitative and quantitative effects. The variables were correlated, and affinities with the genotype x phosphate source interaction were found. Based on the yield data, the recommendations for Americana are 911, 680 or 457 kg P 2 O 5 ha-1 from MAP, Polyblen, and SPT, respectively. For Crespa the recommendations are 580 or 611 kg P 2 O 5 ha-1 from MAP and SPT, respectively.