Search Results - "mathematics"

Descripción agronómica y matemática de algunos sistemas de poda de Coffea arabica en Centro América, México y República Dominicana by Somarriba, E., Quesada, F., López Sampson, A., Melo, E.D., Medina, B., Muschler, R., Chaves, V., Martínez, R.

“…Here, we provide a technical-mathematical tool that helps in the conceptualization of the development of tissues subjected to pruning and its relationship with the yield of coffee beans, per plant and per area. …”
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Recommendations on the utilization of the in vitro, in situ and enzymatic methods for the study of feed digestion by González, D., Ruíz, M.E., Romero, F., Pezo, Danilo A.

“…Summarizes the recommendations on the utilization of the in vitro, in situ and enzymatic methods, w. partic. ref. to in vitro digestion; enzymatic degradation; in situ digestibility; and mathematical models.…”
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A CGE model for Malawi: technical documentation by Lofgren, Hans

“…The Appendices present a mathematical model statement in summary form and the 1998 Malawi SAM.…”
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Livestock productivity and trypanotolerance. Reprints of papers. August 1978 - September 1981 by International Livestock Centre for Africa

“…Presents various papers prepared by the trypanotolerance and breed productivity team of ILCA, related to studies on trypanotolerant livestock, productivity of dif. breed types and herd level mathematical modelling.…”
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Agricultural research, biometry and statistics by Technical Centre for Agricultural and Rural Cooperation

“…Biometry is nor just the mechanical application of mathematical procedures, but is a coherent concept which must beunderstood before implementing or analysing scientific experiments. …”
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Uso do computador no cálculo do balanco hídrico climático by Pinto, H.S., Preuss, A.

“…Monthly values of soil water retention are calculated on mathematical basis.…”
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The marginal lands of western Sidamo by Bille, Jean-Claude, Eshete, A.

“…Includes data on percentage composition of dif. shrub, tree & grass species and examines suitability of mathematical formulae for explaining the spatial arrangement of dif. grass and total plant cover classes.…”
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Seed dormancy responses to temperature relate to Nothofagus species distribution and determine temporal patterns of germination across altitudes in Patagonia by Arana, María Verónica, Gonzalez Polo, Marina, Martinez Meier, Alejandro, Gallo, Leonardo Ariel, Benech-Arnold, Roberto Luis, Sanchez, Rodolfo Augusto, Batlla, Diego

“…This phenomenon was described mathematically by the interplay between interspecific differences in seed population thermal parameters and the range in soil thermic environments across different altitudes. …”
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Modelo de simulación para el movimiento de productos químicos en el suelo by Sanabria Rodriguez, Joaquin

“…This paper presents a simulation model with its mathematical basis, assumptions and limitations, and its solution by the microcomputer. …”
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Algunas características de la precipitación en Palmira, Colombia by Peña Durán, D.

“…The rainfall data for Palmira City for tlw period 1930-1980 were statistically and mathematically analyzed in order to study some of its characteristics such as secular trend and periodicity. …”
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On the poverty–growth elasticity by Arndt, Channing, Mahrt, Kristi, Schimanski, Caroline

“…Poverty–growth elasticities are frequently calculated to provide insight into the inclusiveness of the growth process. Mathematically, the formula employed to calculate the growth elasticity of poverty leads to lower values for higher initial poverty rates, ceteris paribus. …”
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Criterio agronómico de diseño de canales de riego y bocatomas. II. Diseño de bocatomas by Gundersen L., W.

“…The method includes water soil-plant relationships based on a simple mathematical formula, as the principal basis, modified by other factors that should be considered when crops are irrigated. …”
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Modelling the transmission dynamics of Cowdria ruminantium: Supporting the case for endemic stability by O'Callaghan, C.J., Medley, G.F., Peter, T.F., Perry, Brian D.

“…An outline of the model developed and the corresponding mathematical details are presented.…”
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The evolution and evaluation of dairy cattle models for predicting milk production: an agricultural model intercomparison and improvement project (AgMIP) for livestock by Tedeschi, L.O., Cavalcanti, L.F.L., Fonseca M.A., Herrero, Mario, Thornton, Philip K.

“…We contend that improving the adequacy of mathematical nutrition model estimates of production of meat and milk is a sine qua non condition to reliably determine ruminants’ worldwide contribution to GHG. …”
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A climate-based model for tick life cycle: positive semigroup theory on Cauchy problem approach by Ndongo, Mamadou Sadio, Ibrahima Ndiaye, Papa, Gharbi, Mohamed, Rekik, Mourad, BenMiled, Slimane, Darghouth, Mohamed Aziz

“…We suppose that intra stage development process is temperature dependent (Arrhenius temperatures function) and that larvae hatching and adult mortality are temperature and water vapor deficit dependent. We analysed mathematically the model and have explicit the R0 of the tick population.…”
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A comparison of spectral preprocessing methods and their effects on nutritional traits in cowpea germplasm by Padhi, Siddhant Ranjan, John, Racheal, Tripathi, Kuldeep, Wankhede, Dhammaprakash Pandhari, Joshi, Tanay, Rana, Jai Chand, Riar, Amritbir, Bhardwaj, Rakesh

“…In amylose, the best RSQ external (coefficient of determination) (0.962) was found in SNV‐DT with mathematical treatment 3,8,8,2. The same result was shown in sugar where the best RSQ external (0.914) was found in SNV‐DT with mathematical treatment 3,4,4,1. …”
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The effect of climate variability in the efficacy of the entomopathogenic fungus Metarhizium acridum against the desert locust Schistocerca gregaria by Kamga, Samuel F., Ndjomatchoua, Frank T., Guimapi, Ritter A., Klingen, Ingeborg, Tchawoua, Clément, Hjelkrem, Anne-Grete Roer, Thunes, Karl H., Kakmeni, Francois M.

“…A dynamic process-based mathematical model integrating essential features of a natural enemy and its interaction with the pest is used to generate R0 risk maps for insect pest outbreaks, using desert locust and the entomopathogenic fungus Metarhizium acridum (Synn. …”
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Multivariate mapping of soil with structural equation modelling by Angelini, Marcos Esteban, Heuvelink, Gerard B.M., Kempen, Bas

“…Next, we derived a mathematical model and calibrated it with environmental covariates and soil data from 320 soil profiles. …”
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Financial debt of the construction sector in Colombia between 2012-2015 by Wilches, Fernando Jove, Feria Diaz, Jhon J., Arias Robles, Milena Esther

“…In order to analyze the indebtedness margins of the national construction sector to identify opportunities for improvement, a refined database of 10,708 companies arranged chronologically between 2012-2015 was consolidated and by mathematical transformation the indicators of leverage, concentration of the liabilities in the short term, indebtedness with the financial sector and the indebtedness ratio. …”
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Sustainability of African smallholder farming systems: case study of highland areas of Central Africa by Manyong, A.M., Degand, J.

“…Multiple-objective mathematical programming models are appropriate to address such issues.…”
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