Resultados de búsqueda - "Kendal"

Farmers’ perspective toward a demand led yam breeding in Nigeria por Kalu, C., Nnabue, I., Edemodu, A., Agre, A.P, Adebola, P.O., Asfaw, A., Obidiegwu, J.E.

“…The data obtained were analyzed using a 5-point Likert scale to identify major traits farmers consider in the yam cultivar selection decision. Kendall’s coefficient of concordance was used to measure the degree of agreement of ranking among the farmers. …”
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Exploring Gender Differences in the Role of Trait Preferences among Stakeholders in the Rice Value Chain in Ghana por Frimpong, B.N., Asante, M.D., Prah, S., Ayeh, S.J., Sakyiamah, B., Zenna, Negussie, Mujawamariya, Gaudiose, Tufan, Hale Ann

“…Four hundred rice farm households and 261 consumers were surveyed across 20 communities using a simple random sampling technique. Kendall’s coefficient of concordance, Tobit, and the multivariate probit regressions were used in the analyses. …”
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Effect of urbanization on East African climate as simulated by coupled urban-climate model por Zeleke, Tadesse T, Giorgi, Flippo, Diro, Gulilat T, Zaitchik, Benjamin, Giuliani, Graziano, Ayal, Desalegn, Ture, Kassahun, Workneh, Sintayehu, Demissie, Teferi Dejene

“…Seasonal trend of rainfall and temperature was analyzed using Mann-Kendall trend test and statistically significant rainfall trend is observed during spring (February-May) and summer (June-September) over northeast and spring/“bega”(October-January) seasons in southeastern regions of Ethiopia, thereby suggesting a seasonal shift of rainfall distribution. …”
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Spatiotemporal characterization of droughts and vegetation response in Northwest Africa from 1981 to 2020 por Nguyen Quang Thi, Ajit Govind, Manh-Hung Le, Nguyen Thuy Linh, Tran Thi Mai Anh, Nguyen Khac Hai, Tuyen V. Ha

“…Morocco suffered from more frequent droughts than other countries in the region. The Mann-Kendall test showed that the trend of drought became drier over the last decade, whereas the period from 1981 to 2010 witnessed either wetting or no trends. …”
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Effect of climatic variability on malaria trends in Baringo County, Kenya por Kipruto, E.K., Ochieng, A.O., Anyona, D.N., Mbalanya, M., Mutua, Edna N., Onguru, D., Nyamongo, I.K., Estambale, B.B.A.

“…A negative binomial regression model with lagged climate variables was used to model long-term monthly malaria cases. The seasonal Mann–Kendall trend test was then used to detect overall monotonic trends in malaria cases. …”
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Sistemas de evaluación de tierras y elaboración de modelos de aptitud de uso agrícola, para distintos escenarios climáticos, en un sector de la subregión pampa arenosa (Provincia d... por Irigoin, Julieta

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Modelos basados en variables meteorológicas para estimar el progreso epidémico de la bacteriosis del nogal en variedades de distintos comportamientos. por Seta, Silvana A., Moschini, Ricardo, Gonzalez, Miriam del Pilar

“…Las variables mejor correlacionadas (rk: coeficiente de correlación de Kendall Tau-b) con los niveles de bacteriosis (severo:Tid% >0,1367; moderado a nulo: Tid%<=0,1367, siendo 0,1367 el percentil 40% de los datos observados), para los dos tipos de variedades (sus=1 y sus=0), fueron DPr>9 (días con precipitación>9mm; rk=0,434) y DMojro (días sin lluvia, con mojado atribuible al rocío por ocurrencia de humedad relativa del aire mayor a 82%; rk=0,326). …”
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Impact of Climate Change on the Hydrology of the Upper Awash River Basin, Ethiopia por Emiru, Nega C., Recha, John W.M., Thompson, Julian R., Belay, Abrham, Aynekulu, Ermias, Manyevere, Alen, Demissie, Teferi Dejene, Osano, Philip M., Hussein, Jabir, Molla, Mikias B., Mengistu, Girma M., Solomon, Dawit

“…A soil and water assessment tool (SWAT) model was calibrated and validated against observed streamflow using SWAT CUP. The Mann–Kendall trend test (MK) was used to assess climate trends. …”
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Climate change effects on Chickpea yield and its variability in Andhra Pradesh, India por Kumar, K. Nirmal Ravi, Reddy, M. Jagan Mohan, Babu, Suresh Chandra

“…Four non-parametric methods-Alexandersson’s Standard Normal Homogeneity Test, Buishand’s Range Test, Pettitt’s Test and Von Neumann’s Ratio Test are applied to detect homogeneity in the data. Mann–Kendall (MK) test and Sen’s slope (SS) method were employed to analyze monthly rainfall trends and minimum and maximum temperature trends. …”
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Challenges, barriers, and determinants of farmers’ adoption of agroecological practices in Tunisia: A Case study of Hamam biadha and Elles por Khader, Amina

“…In the empirical analysis, qualitative and quantitative approaches were used, including factor and bivariate analysis (i.e., Kendall’s test). Farm typologies, predominantly mixed systems combining cereal-tree-small ruminant components, were identified. …”
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Spatio-temporal variability of climatic variables and its impacts on rice yield in Bangladesh por Al Mamun, Md. Abdullah, Nihad, Sheikh Arafat Islam, Sarkar, Md. Abdur Rouf, Sarker, Mou Rani, Skalicka, Jitka, Skalicky, Milan

“…The study utilized the Mann–Kendall method to evaluate trends and employed Sen’s slope to quantify their magnitude. …”
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Predictability of seasonal precipitation across major crop growing areas in Colombia por Esquivel, Alejandra, Llanos Herrera, Lizeth, Agudelo, Diego, Prager, Steven D., Fernandes, Kátia, Rojas, Alexander, Valencia, Jhon Jairo, Ramírez Villegas, Julián Armando

“…Some 74.4% of the forecast situations analyzed (5 departments ∗ 4 seasons ∗ 3 predictors ∗ 3 lead times) showed correlation-based goodness index (Kendall’s tau, ) values above 0.1, 38.8% above 0.2, and 18.8% above 0.3. …”
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Long-term phosphorus trends in Swedish rivers and streams por Camiolo, Sara

“…Time trends analyses showed that the majority of the statistically significant (Mann-Kendall test, p value <0.05) watercourses had relevant total phosphorus (Tot-P) and phosphate (PO₄P) declining concentrations between 1980 – 2020, and the most important losses were registered for river stations situated in north Sweden. …”
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Factores socioeconomicos relacionados a la morosidad de los creditos agricolas en la caja municipal de ahorro y crédito “Huancayo S.A.” agencia puerto Bermúdez – Oxapampa por Pacaya Quispe, Daniel Yung

“…La sustentación del supuesto planteado se realizó la testimonio de confiabilidad del herramienta utilizando para tal motivo el estadístico de Alfa Crombach (r²=,84) y establecer la correlación de variables a través de estadístico de Tau_b de Kendall, arribando a la conclusión que los elementos socio económicos y el incumplimiento de los clientes en la CMAC Huancayo – agencia Puerto Bermúdez tiene una relación directa y positiva (r²=0,614), el nivel de relevancia es de 0,000 < al α = 0,05; afirmándose la hipótesis alterna; Los elementos socioeconómicos están vinculados con la Morosidad en los agricultores que acceden al crédito en la CMAC “Huancayo S.A.” …”
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Ajuste de modelos logísticos a la tasa de incremento de severidad de manchas foliares ocasionadas por Alternaria tenuissima en arándano = Logistic models adjustment to growth rate... por Moschini, Ricardo Carlos, Bombelli, Enrique Carlos, Wright, Eduardo Roberto, López, María Virginia, Perez Canone, Huber Ignacio, Carmona, J.D., Varsallona, Bruno, Barberis, Juan Guillermo, Fabrizio, María del Carmen, Rivera, Marta Carolina

“…La variable DPrT (días con precipitación y temperaturas entre 19 y 36 °C) calculada en los 10 días previos a cada valor de TId% resultó la más fuertemente correlacionada (coeficiente de Kendall = 0,70). La mayor precisión de predicción (94,1 %) fue alcanzada por modelos bivariados, como los que integraron a DPrT y PrAc (acumulación de las precipitaciones diarias) y a DPrT y Snc. …”
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Trends in reference evapotranspiration and associated climate variables over the last 30 years (1984–2014) in the Pampa region of Argentina por D´Andrea, María Florencia, Rousseau, A.N., Bigah, Yao, Gattinoni, Natalia Noemí, Brodeur, Celine Marie Julie

“…The presence of temporal trends was evaluated using Mann-Kendall’s statistical test, whereas abrupt changes were detected through Pettitt test. …”
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Application of mixed methods to identify small ruminant disease priorities in Ethiopia por Alemu, Biruk G., Desta, Hiwot, Kinati, Wole, Mulema, Annet A., Gizaw, Solomon, Wieland, Barbara

“…Highest scores in proportional piling (out of 100 counters) were obtained for respiratory diseases and gastrointestinal parasites in highland areas (mixed crop-livestock systems) with strong agreement among respondent groups using Kendall's coefficient of concordance (W) (W = 0.395, p < 0.01); whereas in lowland areas (pastoral and agro-pastoral systems), the priorities were respiratory and neurological diseases, also with very strong agreement (W = 0.995, P < 0.01). …”
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Empirical Analysis Of Seasonal Rainfall Variability And Its Associated Effects On Major Food Crop Yields In Rwanda por Ayabagado, Prosper

“…Again, the onset/cessation of rainfall in each delineated zone was computed and a standardized precipitation index was calculated in order to understand temporal variability of rainfall amount and frequency. Mann – Kendall and Sen’s slope estimates statistics was computed in order to quantify the magnitude of change in rainfall and its trend The results indicated that there are ten near homogeneous rainfall zones during the short rains season and nine near homogeneous rainfall zones during the long rains for the 37 years period of seasonal rainfall datasets from 1981 to 2017 over Rwanda. …”
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Assessment of land degradation in semi-arid Tanzania: Using remote sensing to inform the Sustainable Development Goal 15.3 por Reith, J.A.

“…Human-induced LD was assessed using the Normalized Difference Vegetation Index (NDVI) correcting it for precipitation variability with the Rain Use Efficiency (RUE). Based on Mann-Kendall's tau and using the mean NDVI per growing season, evidence suggests that 18.9% of the study area degraded, while further 14.9% showed early signs of decline. …”
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Determinants of climate change adaptation and perceptions among small-scale farmers of Embu County, Eastern Kenya por Kangai, Ruth, Chitechi, Everlyn Wemali, Koske, James, Waswa, Boaz Shaban, Ngare, Innocent

“…The farmers’ perceptions were corroborated by the long-term rainfall and temperature of Mann-Kendall trends analysis, which showed a negative rainfall correlation and temperatures increased by 0.02°C for Kiambere and 0.03°C for Embu stations. …”
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