Resultados de búsqueda - "field experiment"

Sequential phosphorus extraction of a 33P-labeled oxisol under contrasting agricultural systems por Buehler, S., Oberson, Astrid, Rao, Idupulapati M., Friesen, Dennis K., Frossard, Emmanuel

“…A Colombian Oxisol, sampled from a long-term field experiment with contrasting management treatments, was labeled with carrier free 33P and extracted after incubation times of 4 h, 1, and 2 wk. …”
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Observation on the effect of levels of salt and stocking periods on putrefaction in preserving sheep skin at three altitudes in Ethiopia por Nigatu, A., Ayalew, W.

“…A field experiment was conducted to determine the effect of different levels (20, 30, 40, 50 and 60%) and durations (30, 45 and 60 days) of salt preservation for controlling putrefaction on sheepskin at low (Metehara), mid (Debre Zeit) and high (Debre Birhan) altitudes of Ethiopia to determine technically acceptable levels of salting and stocking periods. …”
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Pathogenicity and damage potential of five species of plantparasitic nematodes on plantain (Musa spp., AAB genome) cv. Agbagba por Coyne, Danny L., Omowumi, A., Rotifa, I., Afolami, S.

“…Through a series of experiments, the nematode damage potential was evaluated in 20 l pots, 70 l microplots (halved oil drums) and a field experiment over four crop cycles. In pots only a combination of four species (without H. pararobustus) led to greater root necrosis than the non-inoculated control, while R. similis reduced root mass. …”
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Environment and hostplant genotype effects on the seasonal dynamics of a predatory mite on cassava in subhumid tropical Africa por Zundel, C., Nagel, P., Hanna, R., Korner, F., Scheidegger, Urs C.

“…For species that do not diapause or migrate to refuges, the ability of the habitat to mitigate climatic conditions becomes crucial. 2 The relative effect of macro-habitat (dry grassland hill, humid multiple cropping area, humid riparian forest) and microhabitat (host-plant genotypes with hairy, semi-hairy and glabrous apices) on the seasonal dynamics of the phytoseiid mite Typhlodromalus aripo , a predator of Mononychellus tanajoa on cassava, was examined in a field experiment during a dry season. The effect of RH and plant genotype on T. aripo egg survival was determined in an environment control chamber. 3 Predator abundance was higher in humid multiple cropping areas and on hairy cassava compared with the other habitat types and cassava genotypes. 4 Discriminant and regression analyses showed that the predator’s dry season per-sistence was related to high RH, high plant vigour and hairy apices, but not to prey abundance. 5 In the controlled climate experiment, the effect of host-plant morphology was evident only at the intermediate RH level of 55%. …”
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Management of rootknot nematodes on Solanum macrocarpon using botanicals in Benin por Loumedjinon, S., Godonou, I., Atcha-Ahowé, C., James, B., Baimey, H., Coyne, Danny L., Ahanchédé, A.

“…In the search for IPM options, the effect of 5, 20, 35 and 50 g of dried skin peels of cassava storage roots (CP) and orange fruits (OP) each on incidence and damage severity of RKNs and biomass of S. macrocarpon was compared to that of 1, 2, 3 and 4 mg of commercially available fungal nematicide Paecilomyces lilacinus (Pl) and the chemical nematicide Rugby10 applied at 0.4 gpotted S. macrocarpon. In the field experiment CP and OP applied at 840 g and 1200 g1.4 m x 1 m bed; Pl at 75 g and 96 gbed and Rugby10 at 12 gbed. …”
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The role of product information on consumer sensory evaluation, expectations, experiences and emotions of cricket-flour-containing buns por Pambo, K.O., Okello, J.J., Mbeche, R.M., Kinyuru, J.N., Alemu, M.H.

“…The study is based on a field experiment involving 432 participants drawn from rural communities in Kenya. …”
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Maize–common bean intercropping to optimize maize-based crop production por Alemayehu, A., Tamado, T., Nigussie, D., Yigzaw, D., Kinde, T., Wortmann, Charles S.

“…–common bean (Phaseolus vulgaris L.) intercropping is a recent practice in north-western Ethiopia and there is limited information on its productivity. A field experiment was conducted at South Achefer and Mecha in north-western Ethiopia during the 2012 and 2013 crop growing seasons to determine combinations of intercrop planting arrangement (IPA) with nitrogen (N) and phosphorus (P) rates for optimizing maize–common bean intercrop productivity and profitability. …”
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Evaluating soil rhizobacteria for their ability to enhance plant growth and tuber yield in potato por Oswald, A, Calvo Velez, P., Zúñiga Dávila, Doris Elizabeth, Arcos Pineda, Jesus Heraclides

“…Although in vitro and greenhouse results were promising, the field experiment showed variability and the results require further verification. …”
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Response to Fertilization Associated to Leaf Mineral Content in Strawberry por Agüero, Juan José, Kirschbaum, Daniel Santiago

“…Leaf mineral content along the crop cycle may explain differences in response to fertilization among strawberry genotypes. A two year field experiment was conducted using responsive (‘Camarosa’, ‘Ventana’) and nonresponsive (‘Camino Real’, ‘Candonga’) to fertilization genotypes under proportional increases in nutrients supply: from a control dose “C” [120 kg nitrogen (N) ha−1, 70 kg phosphorus pentoxide (P2O5) ha−1, 220 kg potassium oxide (K2O) ha−1, 40 kg calcium oxide (CaO) ha−1 and 20 kg magnesium oxide (MgO) ha−1] to “1.33C” and “1.66C” in 2007 and to “1.5C” and “2C” in 2008. …”
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Complementary irrigation and direct drilling have little effect on soil organic carbon content in semiarid Argentina por Giubergia, Juan Pablo, Martellotto, Eduardo, Lavado, Raul Silvio

“…Two treatments (irrigated and rain fed soils) were evaluated in a field experiment set up in Manfredi, Córdoba province, Argentina. …”
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Moderate plant water stress reduces fruit drop of "Rojo Brillante" persimmon (Diospyros kaki) in a Mediterranean climate por Badal, Eduardo, Abd El-Mageed, T. A., Buesa, Ignacio, Guerra, Diego, Bonet, Luis, Intrigliolo, Diego S.

“…To achieve this goal, a field experiment was conducted during three consecutive seasons with mature trees. …”
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The effect of different oxygen and salinity levels in the rooting media on the growth of cotton (Gossypium barbadense and G. hirsutum L.) por Owen Bartlett, E.J.

“…Meek for his generous cooperation and help in the field experiment at Brawley; Dr. C. K. Huszar and Mrs. …”
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Poplar for biodiversity? : comparison of lichen communities in stands of Balsam poplar, Hybrid larch, Silver birch and Norway spruce por Jastrzebska, Ewa Zuzanna

“…In this context, epiphytic lichens were investigated in two stands of non-native tree species (Larix×eurolepis and Populus trichocarpa) and two stands of native tree species (Picea abies and Betula pendula) in a field experiment in southern Sweden. The trunks in the stands were examined separately for northern and southern side of the tree trunk. …”

Isolation, protocol optimization and screening of genotypes against net blotch and scald of barley in controlled condition por Dhakal, Rishap

“…Also, a rank correlation analysis was used to compare the net blotch resistance of official trial cultivars under controlled conditions and in a field experiment. 25 cultivars out of 37 showed similar resistance type in both field and controlled condition. …”
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Selection of Rhizobium leguminosarum strains via symbiotic and production variables in Pisum sativum L. = Selección de cepas de Rhizobium leguminosarum por variables simbióticas y... por Piccinetti, Carlos Fabian, Eöry, Carolina Alba, Prieto, Gabriel Maria, Vallejo, Daniela Adriana, Enrico, Juan Martin, Salvagiotti, Fernando, Perticari, Alejandro

“…D70 provided good nodulation, N content in biomass, and yield in the growth chamber, greenhouse, and field experiments, whereas D156 had a like or superior behavior in the greenhouse and field experiments. …”
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Tillage and mulching effects on physical properties of a tropical alfisol por Franzen, H., Ehlers, W.

“…Therefore, a 2 year (1982–1984) field experiment was initiated on an Alfisol in Nigeria to study the effect of tillage, mechanization and mulch on soil structure and physical properties. …”
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Field measurements of nitrogen fixation in leguminous trees used in agroforestry systems: influence of 15Nlabelling approaches and reference trees por Sanginga, N., Danso, S.K.A., Zapata, F.

“…Appropriate 15N-labeling methods are crucial for estimating N2-fixation in trees used in agroforestry systems. A 4-year field experiment was conducted on an Alfisol in Southwestern Nigeria to compare the estimates of Na fixed in Leucaena leucocephala, using two non-N2-fixing leguminous trees, Senna siamea and S. spectabiIis, as reference plants and three different methods of introducing 15N into soil. …”
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Soil biological properties and fungal diversity under conservation agriculture in Indo-Gangetic Plains of India por Choudhary, Madhu, Sharma, Parbodh Chander, Jat, Hanuman Sahay, McDonald, Andrew J., Jat, Mangi Lal, Choudhary, Sharda, Garg, Neelam

“…A field experiment was undertaken to evaluate the effect of conservation agriculture (CA) based management on soil biological properties, and on fungal diversity and abundance after 5 years of continuous cultivation. …”
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Effect of seasonal drought on the agronomic performance of four banana genotypes (Musa spp.) in the East African highlands por Uwimana, Brigitte, Zorrilla-Fontanesi, Yasmín, Wesemael, Jelle van, Mduma, Hassan, Brown, Allan, Carpentier, Sebastien C., Swennen, Rony L.

“…This study aimed at understanding the effect of seasonal drought on early growth, flowering and yield traits in bananas grown in the East African highlands. A field experiment was set up in North Tanzania using four genotypes from different geographical origins and two different ploidy levels. …”
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Preliminary report on calibration of chemometric equations of portable NIRS, suitable for screening of nutritional quality traits in Brachiaria brizantha-ruzisiensis-decumbens gene... por Mazabel, Johanna, Castiblanco, Valheria

“…The population study correspond to 110 genotypes of Brachiaria Hybrids established in two locations from Colombia with an experimental design Alpha lattice ( 10X 11) in plots measuring 1 X 1 m, and two repetitions. The field experiment was conducted during the years 2019 and 2020 on research stations of Agrosavia (Nataima, Tolima, Colombia) and CIAT (Palmira, Valle del Cauca, Colombia). …”
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