Resultados de búsqueda - "inversión"

Differential inhibitory action of cotton root juices on isolates of Fusarium oxysporum f. sp. vasinfectum (Atkinson) Snyder and Hansen por Khan, I.D., Sabet, K.A.

“…On the basis of the data obtained, it has been shown that in Egyptian cotton varieties there is an inverse relationship between the amount of inhibition (of the strains tested) and the disease potential achieved in the variety.…”
Enlace del recurso

Bee richness and abundance in an altitudinal gradient of 1,250 meters in San Antonio de Oriente, Honduras por Caprotti R., Giuliana

“…A direct correlation between richness and abundance was found, and an inversely proportional relation was found between elevation and richness as well as elevation and abundance. …”
Enlace del recurso

Effets de la fertilisation et de la date de semis sur des variétés de sorgho à double usage por Togo, A.

“…Et sans fertilisation, on observe l’inverse (1117,2 kg/ha pour Peke contre 518,5 kg/ha pour Soubatimi). …”
Enlace del recurso

Phenology, parasitism and density dependence of Psyllaephagus bliteus on Eucalyptus camaldulensis por Cuello, Eliana Marina, Andorno, Andrea Veronica, Hernandez, Carmen Marcela, Lopez, Silvia Noemi

“…The highest levels of parasitism were registered when psyllid population was minimal, while density dependence analysis detected an inverse relationship between P. bliteus and its host.…”
Enlace del recurso
Enlace del recurso
Enlace del recurso

Functional and numerical response and mutual interference of Goniozus legneri (Hymenoptera: Bethylidae) on Cydia pomonella (Lepidoptera: Tortricidae): Its implications for biologic... por Cavallo, María José, Romero, Oscar Eduardo, Barros, Lucas Ariel, Cichon, Liliana, Garrido, Silvina Alejandra, Diez, Patricia Alejandra

“…The negative value of the inter ference coefficient (−0.228) in the mutual interference analysis showed an inverse relationship between parasitoid density and per capita searching efficiency. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

The impact of demonstration plots on improved agricultural input purchase in Tanzania: Implications for policy and practice por Sseguya, H., Robinson, D.S., Mwango, H.R., Flock, J.A., Manda, J., Abed, R., Mruma, S.O.

“…Using propensity score matching and inverse probability-weighted adjustment models, the authors estimated the effect of access to demonstration plots alone and demonstration plots combined with small packs of agricultural inputs on a household’s decision to purchase improved inputs. …”
Enlace del recurso

Does cooperative membership increase and accelerate agricultural technology adoption? Empirical evidence from Zambia por Manda, J., Khonje, M., Alene, A., Hirpa Tufa, A., Abdoulaye, Tahirou, Mutenje, M., Setimela, P.S., Manyong, Victor

“…Furthermore, the study used the inverse probability weighted regression adjustment model to analyze the impact of cooperative membership on the speed of adoption of improved maize varieties. …”
Enlace del recurso

Are agro-clusters pro-poor? Evidence from Ethiopia por Tabe-Ojong, Martin Paul Jr., Dureti, Guyo Godana

“…Our results are robust over different agro-cluster proxies and alternative estimators, such as the augmented inverse probability weighting estimator. We also show that our findings are unlikely to be driven by omitted variable bias. …”
Enlace del recurso

Assessing the speed of improved postharvest technology adoption in Tanzania: the role of social learning and agricultural extension services por Manda, J., Feleke, S., Mutungi, C., Tufa, A.H., Mateete, B., Abdoulaye, T., Alene, A.D.

“…We utilized the doubly robust multivalued inverse probability weighted regression (MIPWRA) model to estimate the impact and the Laplace regression model to evaluate the heterogeneous effects of the two information channels. …”
Enlace del recurso

Mechanize or exit farming? Multiple‐treatment‐effects model and external validity of adoption impacts of mechanization among Nepalese smallholders por Takeshima, Hiroyuki

“…We investigate this issue by applying multinomial logit inverse‐probability weighting and sample selection panel data methods to data on smallholders in lowland Nepal. …”
Enlace del recurso

Trade-off between foliage and tuber resistance to Phthorimaea operculella in wild potatoes por Horgan, Finbarr G., Quiring, Dan T., Lagnaoui, Aziz, Pelletier, Yvan

“…We examined the hypothesis that allocation to defence in leaves is inversely related to allocation to defence in tubers of two distinct trichome‐bearing morphotypes of the wild potato, Solanum berthaultii Hawkes (Solanaceae). …”
Enlace del recurso

Fertilizer use patterns in Yunnan Province, China: implications for agricultural and environmental policy por Yunju L, Kahrl F, Jianjun P, Roland-Holst, D., Yufang S, Wilkes, Andreas, Jianchu X

“…None of the factors that we examine in this study are robust predictors of fertilizer intensity (kg ha−1) in the survey regions, though in one survey there is a strong inverse relationship between farm size and fertilizer intensity. …”
Enlace del recurso

Carcass characteristics of indigenous breeds of cattle in Nigeria por Buvanendran, V., Ikhatua, U.J., Abubakar, B.Y., Olayiwole, M.B.

“…Bone percentage was inversely related to fat percentage. The relative growth coefficients of muscle and fat were 1.28 and 1.80, whereas that of bone was 0.59. …”
Enlace del recurso

Semences et séquences génétiques en open source ? Expériences récentes et stratégies futures por Louafi, S., Westphal, I., Montenegro, M., Manzella, D., Otieno, G., Steigerwald, S., Kloppenburg, J.

“…Le concept d'open source appliqué aux semences végétales a un avenir prometteur. Ce concept inverse la logique du système de propriété intellectuelle pour une ressource renouvelable que l'on rend disponible en la sortant du domaine exclusif de la propriété intellectuelle. …”
Enlace del recurso

Vegetation composition and structure changes following roller-chopping deforestation in central Argentina woodlands por Steinaker, Diego F., Jobbagy Gampel, Esteban Gabriel, Martini, Juan Pablo, Arroyo, Daniel Nicolas, Pacheco, Jorge L., Marchesini, Victoria A.

“…Roller-chopping favoured early over late successional species in the case of woody plants, but had the inverse effect in the case of grasses. At ecosystem scale the length of the growing season was drastically shortened by 100 days following disturbance. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

Impacts of agricultural value chain development in a mountainous region: evidence from Nepal por Kafle, Kashi, Songsermsawas, T., Winters, P.

“…We use data from a carefully designed primary survey administered in the hill and mountainous region in Western Nepal. Using the inverse probability weighted regression adjustment method, we show that linking small-scale producers with regional and local traders can help increase agricultural income. …”
Enlace del recurso

Prediction of crossover recombination using parental genomes por Peñuela, Mauricio, Riccio-Rengifo, Camila, Finke, Jorge, Rocha, Camilo, Gkanogiannis, Anestis, Wing, Rod A., Lorieux, Mathias

“…It presents a model that uses sequence identity, combined with other features derived from a genome alignment (including the number of variants, inversions, absent bases, and CentO sequences) to predict local chromosomal recombination in rice. …”
Enlace del recurso

Management of Banana Xanthomonas Wilt: Evidence from impact of adoption of cultural control practices in Uganda por Kikulwe, Enoch M., Kyanjo, Joseph Lule, Kato, Edward, Ssali, Reuben T., Erima, Rockefeller

“…A multinomial logit model was used to determine the factors affecting adoption of control practices and augmented inverse probability weighting was employed to estimate the impacts of adoption on banana productivity and sales. …”
Enlace del recurso

Effects of tractor ownership on agricultural returns-to-scale in household maize production: Evidence from Ghana por Takeshima, Hiroyuki, Houssou, Nazaire, Diao, Xinshen

“…These sets of evidence are obtained by addressing jointly the multiple sources of endogeneity of tractor ownership, tractor values, tillage intensity, and other inputs used, through combinations of inverse-probability weighing method, generalized method of moments method, and the mediation effects model with multiple mediators. …”
Enlace del recurso

Joint estimation of farmers' stated willingness to pay for agricultural services por Ulimwengu, John M., Sanyal, Prabuddha

“…On the reverse, distance to the market is inversely correlated with the willingness to pay for agricultural services. …”
Enlace del recurso