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A amostragem da cana-de-açúcar para determinações tecnológicas Anais da ESALQ
Gomes,F. Pimentel; Valsechi,O.; Abreu,Clovis P. de; Oliveira,Enio Roque de.
The authors carried out 3 experiments on the sampling of sugar cane for technological determinations, one with each of the varieties Co 419, CB 40-69 and CB 41-58, in Piracicaba, State of São Paulo, Brasil. The main intent of the project was to compare 2 methods of sampling, namely: 1) Method A, where the sample is a hill (CATANI et al, 1959) or, more generally, 20 stalks all together in a randomly selected point of the furrow; 2) Method B, where 20 stalks are taken, from 20 points evenly spread but on the whole plot. Coefficients of variation for 20 stalk samples Variety Characteristic 20 stalks per hill 1 stalk per hill Brix 4.8% 1.9% Pol 6.4% 2.5% CB 40-69 Coefficient of purity 2.1% 0.83% Available sucrose 7.3% 2.7% Weight 6.6% 6.9% Brix 5.3% 1.8% Pol...
Tipo: Info:eu-repo/semantics/article
Ano: 1963 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761963000100007
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Influência do cloro, sôbre a composição do caldo da cana de açúcar Co 290, aplicado no solo, na forma de cloreto de sódio Anais da ESALQ
Moraes,J. Mello; Almeida,J. R.; Coury,T.; Gomes,F. Pimentel; Valsechi,O.; Ranzani,G.; Kiehl,E. J..
Considering the economic importance of the sugar industry among ourselves, the authors carried out a field experiment (Latin square) with Co 290 sugar cane, on a white sandy soil of Piracicaba, State of São Paulo, Brazil, applying NaCl in increasing rates (from 6.8 to 54.5 grams per plant), in order to study the effects of chlorides, on productivity and on the composition of juice. No toxic or stimulating effect was found, and there was no change in yield, in degree of purity of the juice, in general aspect of plants or in colour of leaves and culms. No difference was observed between potassium sulphate or chloride, as source of potash for sugar cane culture. Data collected and the literature cited suggest: (a) that the use of the variety Co 290 is...
Tipo: Info:eu-repo/semantics/article
Ano: 1951 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761951000100008
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Riqueza em óleo nas sementes, amêndoas e cascas das bagas de mamona Anais da ESALQ
Gurgel,J. T. A.; Valsechi,O..
This paper is a joined publication of the Depts. of Genetics and of Technology, of the E. S. A. "Luiz de Queiroz", Universidade de São Paulo, and deals with the variation of the percentage oil content in the whole seeds, the embryos and the seed-coat of 28 varieties of castor-beans (Ricinus communis, L.). Primarily, the authors, as a justification of this paper, make reference to the applications which castor-oil has in industry, medicine, etc. In accordance with the weight of 100 seeds, the varieties of castor-beans were classified into 3 classes : small seeds (100 seeds less than 30 g), medium seeds (100 seeds between 30 g and 60) and large seeds (100 seeds more than 60 g). The percentage of oil in the seed, embryo and seed-coat, the dimensions of the...
Tipo: Info:eu-repo/semantics/article
Ano: 1952 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761952000100016
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The relation of the concentration of macronutrients in the substrate and in the foliage to cell wall thickness and cellulose concentration in the xylem of slash pine (Pinus elliotti) Anais da ESALQ
Malavolta,E.; Sarruge,J.R.; Haag,H.P.; Vencovsky,R.; Santos,C.F.O.; Valsechi,O.; Scoton,L.C.; Coelho,R.S.G..
Sand culture experiments, using a sub-irrigation technique, were installed in order to find out the effects of the macronutrients N, P, K, Ca, Mg and S on growth, aspect, mineral composition, length of fibers, thickness of cell wall and cellulose concentration in slash pine. The aim was to obtain, under controlled conditions, basic information which could eventually lead to practical means designed to increase the rate of growth and to make of slash pine a richer source of cellulose. Nitrogen, Phosphorus, Potassium Experiment A 3 x 3 x 3 factorial design with two replicates was used. Nitrogen was supplied initially at the levels of 25, 50 and 100 ppm; phosphorus was given at the rates of 5, 10 and 20 ppm; potassium was supplied at the rates of 25, 50 and...
Tipo: Info:eu-repo/semantics/article
Ano: 1970 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761970000100022
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