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Nitrogen fixation in nine common bean (Phaseolus vulgaris L.) lines was estimated using the 15N isotope dilution method at two locations in two seasons. In the first season at one location no N2 fixation was detected while in the second season up to 51 kg N ha?1 were estimated. There were signifi...


Kipe-Nolt, Judith A.Vargas, H.Giller, Ken E.[Nitrogen fixation in breeding lines of Phaseolus vulgaris L.]Nitrogen fixation in breeding lines of Phaseolus vulgaris L.

Sylvester-Bradley, RosemaryKipe-Nolt, Judith A.Harris, DJValencia G., C.A.[Simbiosis leguminosa-rizobio: evaluación, selección y manejo [conjunto audiotutorial]]Simbiosis leguminosa-rizobio: evaluación, selección y manejo [conjunto audiotutorial]

The different stages of a technique developed by CIAT to increase the N fixation of beans are indicated. In stage 1L, the effectivity of native rhizobial strains is assessed; bean nodulation and N fixation are recorded. In stage 1R , rhizobial strains are isolated, purified, authenticated in the ...


Kipe-Nolt, Judith A.Pineda, P.[Una estrategia para mejorar la fijacion de nitrogeno]Una estrategia para mejorar la fijacion de nitrogeno

Six Rhizobium leguminosarum bv. phaseoli strains (Ciat 151, Ciat 895, Ciat 899, CE3, H2C, Kim5s) were tested for nodule occupancy in different bean cultivars at two field sites (one fertile, one acid tropical soil) and in the greenhouse. The effects of several environmental factors such as low pH...


Wolff, ABStreit, WKipe-Nolt, Judith A.Vargas, H.Werner, D[Competitiveness of Rhizobium leguminosarum bv. phaseoli strains in relation to environmental stress and plant defense mechanisms]Competitiveness of Rhizobium leguminosarum bv. phaseoli strains in relation to environmental stress and plant defense mechanisms
Kipe-Nolt, Judith A.Montealegre M, CMTohme, Joseph M.[Restricción en la nodulación por parte de Phaseolus vulgaris L. para superar el problema de competencia en R.I. bv. phaseoli]Restricción en la nodulación por parte de Phaseolus vulgaris L. para superar el problema de competencia en R.I. bv. phaseoli

N2 fixation in lines of Phaseolus vulgaris was measured by 15N-isotope dilution to determine whether a programme of crossing and recurrent selection had resulted in enhanced nitrogen fixation. In field experiments on an isohyperthermic Aquic Hapludoll soil the amount of N2 fixed by the different ...


Kipe-Nolt, Judith A.Giller, Ken E.[A field evaluation using the (15)N isotope dilution method of lines of Phaseolus vulgaris L. bred for increased nitrogen fixation]A field evaluation using the (15)N isotope dilution method of lines of Phaseolus vulgaris L. bred for increased nitrogen fixation

A literature review is presented of the different concepts related to biological N fixation (BNF) in beans as well as the procedures to establish breeding programs leading to increase BNF. The N requirements of bean plants are determined as well as the sources from which it can be obtained; the b...


Rosas, J.C.Kipe-Nolt, Judith A.Henson, R.A.Bliss, Fredrick A.[Estrategias de mejoramiento para incrementar la capacidad de fijacion biologica de nitrogeno del frijol comun en America Latina]Estrategias de mejoramiento para incrementar la capacidad de fijacion biologica de nitrogeno del frijol comun en America Latina

Common bean (Phaseolus vulgaris L.) is nodulated by a heterogeneous group of Rhizobium strains. In a search for host plant restriction of nodulation by some of these strains, 50 wild and cultivated bean accessions were evaluated for the length of time taken to form effective nodules with three di...


Kipe-Nolt, Judith A.Montealegre, CMTohme, Joseph M.[Restriction of nodulation by the broad host range Rhizobium tropici strain CIAT899 in wild accessions of Phaseolus vulgaris L.]Restriction of nodulation by the broad host range Rhizobium tropici strain CIAT899 in wild accessions of Phaseolus vulgaris L.

Nitrogen deficiency severely limits production of the bean maize association grown by small-scale farmers in upland Peru. Sixty-four bean Rhizobium isolates were evaluated for induction of a plant growth response in pots of soil from the area and 14 of the most promising strains of these were tes...


Pineda, PKipe-Nolt, Judith A.Rojas Alvarado, E[Rhizobium inoculation increases of bean and maize yields in intercrops on farms in the Peruvian Sierra]Rhizobium inoculation increases of bean and maize yields in intercrops on farms in the Peruvian Sierra

Seed analysis can indicate differences in micronutrient availability between soils. Comparison of Phaseolus vulgaris L. with published analytical data indicated that the micronutrients most limiting for N2-fixation and growth in parts of East and soLithem Africa were Mo and Cu. Significant differ...


Brodrick, SJAmijee, FKipe-Nolt, Judith A.Giller, Ken E.[Seed analysis as a means of identifying micronutrient deficiencies of Phaseolus vulgaris L. in the tropics]Seed analysis as a means of identifying micronutrient deficiencies of Phaseolus vulgaris L. in the tropics

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