Resultados de búsqueda - "statistics"

Ant (Hymenoptera: Formicidae) species diversity in secondary forest and three agricultural land uses of the Colombian Pacific Coast por Narvaez Vasquez, Alexandra, Gaviria Vega, Jackeline, Vergara Navarro, Erika Valentina, Rivera Pedroza, Leonardo, Löhr, Bernhard

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Assessing the severity and the incidence of Cassava Root Necrosis Disease (CRND) in western Democratic Republic of Congo por Bakelana, Z., Pita, J., Mwangu, K., Tevo, N., Mayanza, K., Betezi, M., Tuwizana, N., Mukendi, T., Tshiamala, N., Mahungu, N., Monde, G., Lema, K.M., Kanana, T., Kalonji, M.

“…Five provinces (Bas-Congo, Kinshasa, Bandundu, Equateur and Kasai-Oriental) were surveyed and data were collected according to the harmonized protocols adopted by countries within the West African Virus Epidemiology (WAVE) project. Statistical tests (ANOVA) performed on our data showed that CRND severity did not vary significantly among the provinces of Kinshasa, Bandundu and Bas-Congo which are the areas most affected by the disease. …”
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Improving data quality for the CAADP biennial review: a partnership initiative piloted in five countries por Benin, Samuel, Karugia, Joseph T., Matchaya, Greenwell C., Yade, Mbaye

“…But most of the estimated differences have low or no statistical significance. Implications for sustaining the progress made in the pilot countries, as well as for extending the activities to other countries, for the next rounds of the BR are discussed.…”
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Integrating satellite and climate data to predict wheat yield in Australia using machine learning approaches por Cai, Y., Guan, K., Lobell, D. B., Potgieter, A.B., Wang, S., You, Liangzhi

“…This work integrated various sources of data to predict wheat yield across Australia from 2000 to 2014 at the statistical division (SD) level. We adopted a well-known regression method (LASSO, as a benchmark) and three mainstream machine learning methods (support vector machine, random forest, and neural network) to build various empirical models for yield prediction. …”
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Efficacy of cassava-maize intercrop on weed control and yield of component crops por Ejalonibu, M.S.

“…All the data collected were subjected to analysis of variance (ANOVA) using Genstat statistical package and significant were separated using LSD at P<0.05. …”
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Global data and tools for local forest cover loss and REDD+ performance assessment: Accuracy, uncertainty, complementarity and impact por Bos, A.B., Sy, Veronique de, Duchelle, Amy E., Herold, M., Martius, C., Tsendbazar, N.E.

“…The direction and degree of REDD+ performance remained statistically uncertain, as CIs were overlapping in most cases for the deforestation estimates before and after the start of the REDD+ interventions. …”
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Conservation agriculture improves adaptive capacity of cropping systems to climate stress in Malawi por Komarek, Adam M., Thierfelder, Christian L., Steward, Peter R.

“…Objective Here we estimated the statistical effect of Conservation Agriculture on cropping-system yields under historical climate conditions. …”
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A novel approach to analyze uncertainties and complexities while mapping groundwater abstractions in large irrigation schemes por Ali Nawaz, Rana, Awan, Usman Khalid, Anjum, L., Liaqat, Umar Waqas

“…Intra-grid annual comparison of in-situ measurements showed that tubewells were being governed by different rules and thus yielded different abstraction within a grid ranging from 854 mm (±105) at head, 742 mm (±220) at middle and 649 mm (±244) at tail grids. Statistical analysis showed that annual GW abstraction by in-situ measurements at head 814 mm (±52), middle 769 mm (±44) and tail 688 mm (±56) end reaches varied significantly at a confidence interval of 95%. …”
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Infiltration-Friendly Land Uses for Climate Resilience on Volcanic Slopes in the Rejoso Watershed, East Java, Indonesia por Suprayogo, D., Widianto, Hairiah, K., Meilasari, N., Rabbani, A.L., Ishaq, R.M., Noordwijk, M. van

“…We related infiltration rates to plot-level characteristics across the land use systems and found statistically significant relations with tree canopy cover (likely based on combined effects of interception, preceding water use and effects on soil), understory cover, amount of litter, and soil surface roughness. …”
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Cassava farmers' insights and seed dealers enterprises in Nigeria por Balogun, D.O.

“…Data were analyzed using frequencies counts, percentages and inferential statistical tools such as Chi-square, PPMC and ANOVA at p=0.05 The result shows that majority (57.6%) of the respondents were between the age of 20 and 45 years, (85.2%) are married and had between primary and secondary education , household size (75.5%) was between one and eight persons, (58.1%) had 10 to 25years of farming experience with (85.3%) less than 0.5hectares of farm size. …”
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Exploring characteristics of national forest inventories for integration with global space-based forest biomass data por Nesha, Karimon, Herold, Martin, Sy, Veronique de, Bruin, Sytze de, Araza, Arnan, Málaga, Natalia, Gamarra, Javier G.P., Hergoualc'h, Kristell, Pekkarinen, Anssi, Ramírez, Carla, Morales Hidalgo, David, Tavani, Rebecca

“…The existing NFI designs could pose specific challenges for statistical integration with RS data in the tropics. …”
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Prospects and potential of bradyrhizobium diazoefficiens based bio-inoculants on soybean production in different agro-ecologies of Mozambique por Engoke, C., Wiredu, A.N., Chikoye, David, Boahen, S.

“…Analysis of variance and contrast comparisons were performed on the Statistical Analysis System® 9.4. Nodule weight per plant variedly increased from 7.7 to 167.6mg with inoculation of both varieties across environments. …”
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Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep por Tesema, Zeleke, Deribe, Belay, Lakew, Mesfin, Getachew, Tesfaye, Tilahun, Mekonnen, Belayneh, Negus, Kefale, Alemu, Shibeshi, Mekonnen, Zegeye, Asres, Yizengaw, Liuel, Alebachew, Getachew W., Tiruneh, Solomon, Kiros, Shambel, Asfaw, Mengesha, Bishaw, Molla

“…The effects of fixed factors were analysed by the general linear model procedure of statistical analysis system, while the genetic parameters were estimated using a WOMBAT computer program fitted animal model. …”
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Status of animal health biosecurity measures of dairy farms in urban and peri-urban areas of central Ethiopia por Moje, N., Waktole, H., Kassahun, R., Megersa, B., Chomen, M.T., Leta, S., Debela, M., Amenu, Kebede

“…The gender of dairy farmers (χ2 value = 7.61; p = 0.006), education level (χ2 value = 12.04; p = 0.007), dairy farm ownership (χ2 value = 41.6; p < 0.001), training on dairy farm management (χ2 value = 37.1; p < 0.001), towns (χ2 value = 31.69; p < 0.001), farm size (χ2 value = 7.7; p = 0.006), and herd size (χ2 value = 28.2; p < 0.001) showed a significant statistical association with biosecurity status. Finally, the study revealed that the level of biosecurity adoption of dairy farms in central Ethiopia is mostly unsatisfactory and calls for designing and implementing intervention measures toward improved animal health in dairy farms and further public health.…”
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Farming systems survey of Meme division south west province Republic of Cameroon por United States Agency for International Development, International Institute of Tropical Agriculture

“…Methods: Preliminary analysis of Meme Division soils, climate and demographic data was followed by a formal survey of 120 farmers in 24 villages of all but one of the most populated ecozones, coupled with qualitative description of one to two fields per village. Statistical and qualitative results were combined to produce a descriptive report based on differences by ecozone and field type. …”
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Development and demographic parameters of Fall Armyworm (Spodoptera frugiperda J.E. Smith) when feeding on rice (Oryza sativa) por Ali, Md Panna, Haque, Sheikh Shamiul, Hossain, Mohammed Mosaddeke, Bari, Md Nazmul, Kabir, Mir Md Moniruzzaman, Roy, Tapon Kumar, Datta, Juel, Howlader, Mohammad Tofazzal Hossain, Alam, Syed Nurul, Krupnik, Timothy J.

“…FAW larvae collected and reared on maize were found to be of significantly higher weight than those reared on rice at two sequential dates of their development; pupal weight however was observed as statistically similar between these two host crops. Regardless of the host, female adults always emerged before males; in maize, female FAW appeared 3.36 days earlier than males. …”
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The association between food environment, diet quality and malnutrition in low‐ and middle‐income adult populations across the rural—Urban gradient in Vietnam por Vuong, Vy Thao, Fiorella, Kathryn J., Jones, Andrew D., Thi Trinh, Huong, Khoury, Colin K., Huynh, Tuyen, Hoang, Ky The, Nguyen, Kien Tri

“…However, we did not observe statistically significant relationships between diet quality and malnutrition. …”
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Mehlich 3 as an indicator of grain nutrient concentration for five cereals in sub-Saharan Africa por Haefele, S.M., Mossa, A.W., Gashu, D., Nalivata, P.C., Broadley, M.R., McGrath, S.P.

“…The M3 concentrations followed the trend of the “high” and “low” grain concentrations in nearly all nutrients and crops, and this was statistically significant in teff and wheat for all nutrients. …”
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Sustainable green tea production through agroecological management and land conversion practices for restoring soil health, crop productivity and economic efficiency: Evidence from... por Viet San Le, Laetitia Herrmann, Lambert Brau, Lesueur, Didier

“…Conventional tea management consistently resulted in higher tea yield and yield components, even though the differences were not always statistically significant. Despite lower tea yields, agroecological tea adopters earned around USD 8400 ha/year more than the farmers still practicing conventional management. …”
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Growth patterns of preterm and small for gestational age children during the first 10 years of life por Nguyen, Phuong Thi, Nguyen, Phuong Hong, Tran, Lan Mai, Khuong, Long Quynh, Nguyen, Son Van, Young, Melissa F., Ramakrishnan, Usha

“…Although preterm children had higher rates of thinness and stunting at 2y compared to AGA children, these differences were not statistically significant. No associations were found between preterm or SGA and overweight /obesity at age 10–11y. …”
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