The objective of this study is to analyze the growth of wild species of tomato, of the cultivar Redenção and of the respective F1 hybrids of interspecific crossings. We evaluated six wild-type accessions (Solanum pimpinellifolium ‘AF 26970’, S. galapagense ‘LA-1401’, S. peruvianum ‘AF 19684’, S. habrochaites var. hirsutum ‘PI-127826’, S. habrochaites var. glabratum ‘PI-134417’, and S. pennellii ‘LA-716’) and the commercial cultivar Redenção (S. lycopersicum) together with their respective interspecific hybrids. In completely randomized blocks and plots subdivided by time (16, 28, 42, 56, 70, and 84 days after transplanting), we evaluated leaf area (LA), total dry matter (TDM), absolute growth rate (AGR), relative growth rate (RGR) and net assimilation rate (NAR). The distribution of assimilates in the different organs followed different patterns according to genotype. There was a greater accumulation of LA and TDM in the accessions ‘PI-127826’ and ‘PI-134417’ and in the hybrids ‘Redenção’ x ‘PI-127826’ and ‘Redenção’ x ‘PI-134417’. Due to a heterotrophic effect provided by the crossings, there were higher LA, TDM, AGR, RGR and NAR in hybrids than in parent plants. The accessions ‘PI-127826’ and ‘PI-134417’ presented a potential to be donor parents for obtaining tomatoes with a greater capacity of net assimilation and biomass accumulation.

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Aiming to assist small farmers, the search for low cost fertilizers and soil acid correctives has intensified. The wood ash waste is an alternative, which can act as fertilizer and corrective. It is also from available materials, which are reuse-able with less environmental impact. The objective of this study was to evaluate the effect of wood ash doses (0, 6, 12, 18, 24 and 30 g dm-3) on the productive characteristics of peanut cv. IAC OL3 and IAC 503. The experiment was carried in a complete randomized block in factorial scheme 2x6 with five replications in a greenhouse at the Federal University of Mato Grosso campus of Rondonópolis, MT. The substrate was Cerrado Oxisol to fill 1.5 dm3 pots. The analysis of variance with sequential polynomial regression test was employed. The results showed that incorporation of wood ash to the soil was beneficial to the productive characteristics of peanuts. The dry mass of pods was influenced by wood ash application with higher results found for cultivar IAC 503. To the variables leaf dry mass, root dry mass, number of pods, grains pot-1 and grains yield showed no significant interaction between wood ash and cultivars. This study recommends wood ash doses in the range between 22.34 g dm-3 and 29.78 g dm-3.

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A calagem é uma técnica de manejo do solo que corrige o pH e disponibiliza parte dos nutrientes para as plantas. Dentre esses nutrientes encontra-se o fósforo, que é essencial para o desenvolvimento e crescimento vegetal, pois é componente fundamental de estruturas energéticas. Em virtude dessa relação, objetivou-se avaliar os efeitos de doses de fósforo em associação com métodos de aplicação de calagem (incubado e não incubado) visando a construção de material para uso com fins didáticos. O experimento foi realizado em casa de vegetação com delineamento inteiramente casualizado em arranjo fatorial 2x5, sendo calagem com período de incubação de 30 dias do calcário e aplicação na semeadura, e cinco doses de fósforo (0, 100, 200, 300 e 400 mg dm -3 ). As variáveis analisadas foram pH, número de folhas, massa seca de parte aérea, diâmetro e massa fresca de tubérculos e teor de açúcares. A incubação do calcário aumenta desenvolvimento do rabanete. O intervalo de doses de fósforo (P2O5) para o maior desempenho agronômico do rabanete é de 218 a 348 mg dm -3 .