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  • Articles  (8)
  • Other Sources
  • maize  (8)
  • Springer  (8)
  • American Meteorological Society
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  • 1980-1984  (8)
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  • 1981  (8)
  • 1931
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (8)
  • Energy, Environment Protection, Nuclear Power Engineering
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  • Articles  (8)
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  • Springer  (8)
  • American Meteorological Society
  • American Physical Society (APS)
  • Copernicus
  • De Gruyter
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  • 2005-2009
  • 2000-2004
  • 1980-1984  (8)
  • 1955-1959
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  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (8)
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  • 1
    Electronic Resource
    Electronic Resource
    Leucaena (Leucaena leucocephala (Lam) de Wit) prunings as nitrogen source for maize (Zea mays L.) (1981)
    Springer
    Nutrient cycling in agroecosystems 2 (1981), S. 279-287 
    Details
    ISSN: 1573-0867
    Keywords: Leucaena ; prunings ; placement ; time of application ; N-source ; maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effectiveness ofLeucaena leucocephala (Lam.) de Wit, prunings as N source for maize (Zea mays L.) was evaluated in field and pot trials at Ibadan, southern Nigeria. An N deficient, sandy Apomu soil (Psammentic Usthorthent) was used. The prunings significantly increased N uptake of seedlings and N percentage in ear leaves of maize. High maize gain yield was obtained with application of 10 tons fresh prunings or a combination of 5 tons fresh prunings and N at 50 kg ha−1. The prunings as N source, appeared to be more effective when incorporated in the soil than when applied as mulch. In the pot trial, prunings applied two weeks before planting was more effective than when applied at time of planting maize. Under screen house conditions, the apparent N recovery from prunings with early incorporation about equals that of fertilizer N.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01050199
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of different nitrogen levels, plant population and soil nutrient status on yield and yield components of maize (Zea mays L.) in different ecological zones of Nigeria (1981)
    Springer
    Nutrient cycling in agroecosystems 2 (1981), S. 177-191 
    Details
    ISSN: 1573-0867
    Keywords: soil nutrient status ; nitrogen fertilization ; maize ; yield component ; ecological zone ; relative yield ; soil testing ; spacing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Field studies on the effect of nitrogen levels, plant population and soil nutrient status on maize yield and yield components at eight different sites representing six different ecological maize growing zones of Nigeria conducted during 1976, 1977 and 1978 indicated that N significantly influenced yield at six of the eight sites, NIFOR, Umudike and Uyo (rain forest zone), Mokwa and Samaru (Savanna zone) and Riyom (derived savanna zone). Optimum N required for maize varies between 50 and 100 kgN in the different zones. There was no response to spacing except at Umudike, Uyo and Riyom, and no significant interaction between N and spacing at any location. Nitrogen application significantly influenced earweight at Ikenne, NIFOR, Umudike, Uyo and Mokwa. Nitrogen application had a significant effect on the number of cobs at NIFOR, Uyo and Mokwa, while spacing significantly influenced number of cobs at all locations except Uyo. Husk weight was significantly increased by nitrogen application at four locations, NIFOR, Uyo, Mokwa and Samaru, but spacing had no effect on this yield component in any of the other locations except Umudike. There was an N by spacing interaction on husk weight at Umudike and Mokwa. Nitrogen application significantly influenced lodging at tasseling at Uyo, Mokwa and Riyom, whilst there was a significant effect of spacing at Uyo and Samaru. At harvest, lodging was not influenced by N application but spacing significantly affected lodging at Ibadan and NIFOR. Both N application and spacing had no significant effect on shelling percentage at any location. The high correlation between relative yield and available Zn(r = 0.77), Cu (r = 0.63) and Fe (r = − 0.66) of the soil at all the locations has shown that: (i) other nutrients besides N, P and K affected maize yield, therefore the inclusion of other nutrients besides N, P and K in the fertilizer recommendation for maize should be encouraged; (ii) different levels of NPK fertilizer plus other nutrients are required in each ecological zone and this can be determined by soil testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01834811
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  • 3
    Electronic Resource
    Electronic Resource
    Inheritance of tillering and flowering-time in early maturing maize (1981)
    Springer
    Euphytica 30 (1981), S. 327-334 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays L. ; maize ; tillering ; flowering-time ; diallel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A diallel cross and F2 populations derived from eight early maturing maize inbreds were used to investigate the inheritance of tillering and flowering-time (anthesis), and the possible relationship between tillering and flowering-time. Incomplete dominance for increased tillering was observed; potence ratios, representing the overall degree of dominance, ranged from 0.26 to 0.52. Dominance for early flowering ranged from incomplete with a potence ratio of 0.55 to overdominance with a potence ratio of 1.40. Broad-sense heritabilities were low for both characters. The genetic component of variation for tillering was due to general combining ability effects; specific combining ability effects were not significant. A significant negative linear relationship between tillering and flowering-time was found. Lack of independent assortment of tillering and flowering-time in F2 populations indicated that the two characters are genetically related.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00033994
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  • 4
    Electronic Resource
    Electronic Resource
    Phenotypic and genetic relationships between yield components in maize (1981)
    Springer
    Euphytica 30 (1981), S. 601-609 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays ; maize ; combining ability ; grain filling ; moisture content ; path coefficients ; yield components
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Physiological components of kernel development — LAG period, effective filling period duration (EFPD) and grain filling rate (GFR) — ear moisture release (ΔU), ear size (row number and kernels per row), days from emergence to silking and number of leaves, were examinated on 45 F1 hybrids (10×10 diallel cross) in order to study their genetic relationships with yield. Combining ability analysis revealed that all trait variability derived mainly from g.c.a. effects. LAG period and EFPD were the traits most affected by genotype-environment interaction. Covariation analysis (path method) based on mean phenotypic values and on g.c.a. effects yielded similar information. It is shown that GFR and EFPD are both related to plant yield, but GFR made the most important contribution. On the contrary, a significant relationship between yield and LAG was not detected. Ear size components were also positively related to yield and had negative effects on GFR. These results indicate that, for our material, the dry matter accumulation rate is the main limiting factor of yield. Considering s.c.a. effects, kernel number per row made the most important contribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00038787
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  • 5
    Electronic Resource
    Electronic Resource
    Use of index selection in recurrent selection programs in maize (1981)
    Springer
    Euphytica 30 (1981), S. 611-618 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays ; maize ; index selection ; recurrent selection ; genotypic correlation ; phenotypic correlation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Phenotypic and genotypic correlations were examined for four traits in seven populations of maize (Zea mays L.) undergoing recurrent selection. Correlations among grain yield and percentage of grain moisture, root lodging, and stalk lodging were low (|r|〈0.3) except for the correlation between grain yield and stalk lodging, which was high and negative. The phenotypic and genotypic correlations agreed well from cycle to cycle within populations. Variation of correlations among populations was not significantly larger than variation among cycles. Heritabilities of these traits generally were high (h2〉0.5). Two indices, one that used heritabilities as index weights and one that used relative economic weights (base index) as index weights, were compared with the Smith-Hazel index (optimim index). Relative efficiencies of the two indices, in terms of predicted gains for the individual traits and the composite trait, compared with the Smith-Hazel index, were high. The use of an index in which heritabilities were used as index weights was recommended because:1) the heritabilities were the same as the optimum weights when the traits were uncorrelated, and for the data examined the correlations were low; and 2) heritabilities were computed in routine data analyses and were available at no additional cost.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00038788
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  • 6
    Electronic Resource
    Electronic Resource
    Selection for brown stripe downy mildew resistance in maize (1981)
    Springer
    Euphytica 30 (1981), S. 393-396 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays L. ; maize ; Sclerophthora rayssiae var ; zeae ; brown stripe downy mildew ; mass selection ; full-sib selection ; grain yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The maize (Zea mays L.) cultivar ‘Makki Safed 1’ (MS1) with susceptibility to brown stripe downy mildew (BSDM) caused by Sclerophthora rayssiae var. zeae Payak & Renfro, was subjected to two cycles of mass selection and one cycle of full-sib family selection. Selection was carried out primarily for BSDM resistance. The mass selection was practised under artificial epiphytotic conditions in a disease nursery. Full-sib progenies and performance trials on MS1 and its improved versions were grown in diseased and disease free environments. Mass selection resulted in a significant improvement for resistance to BSDM. A cycle of full-sib selection resulted in an additional improvement for resistance to the disease. The disease rating of the improved version was 1.5 against 4.5 for the original population (scale: 1, highly resistant to 5, highly susceptible). The yield of the improved populations of MS1 was significantly greater than that of MS1 in the disease nursery. In disease free experiments, the improved populations showed almost no yield advantage over MS1. There were also no significant differences between the original population and the improved population after three selection cycles for ear length, ear girth, number of kernel rows per ear, number of kernels per row, 1000-kernel weight, plant height, ear height and days to silk.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00034002
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  • 7
    Electronic Resource
    Electronic Resource
    Populations of maize with more rapid and reliable seedling emergence than cornbelt dents at low temperatures (1981)
    Springer
    Euphytica 30 (1981), S. 755-763 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays ; maize ; low temperature emergence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Selected races, populations and genotypes of maize (Zea mays L.) from regions where maize is sown under cool conditions were evaluated in controlled-environment rooms for time to seedling emergence and percentage emergence at low temperatures. The objective of the study was to identify populations with the ability to emerge more rapidly and more reliably than Cornbelt Dent, the race most widely used to produce cultivars for temperate regions. Several populations emerged markedly faster and more reliably than Cornbelt Dent populations. All of these populations contained germplasm of highland Mexican origin, except for Gaspé Flint, and the fastest population in each experiment always contained a high proportion of germplasm from the Cónico race. The advantage of populations containing Cónico germplasm was greatest in environments where emergence was slowest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00038805
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  • 8
    Electronic Resource
    Electronic Resource
    The effect of growing beans together with maize on the incidence of bean diseases and pests (1981)
    Springer
    European journal of plant pathology 87 (1981), S. 193-199 
    Details
    ISSN: 1573-8469
    Keywords: mono-cropping ; mixed cropping ; Phaseolus vulgaris ; bean ; Zea mays ; maize ; bean diseases ; Pseudomonas phaseolicola ; halo blight ; bean common mosaic virus ; Colletotrichum lindemuthianum ; anthracnose ; Xanthomonas phaseoli ; common blight ; Elsinoe phaseoli ; scab ; Phoma exigua var. diversispora ; black node disease ; Erysiphe polygoni ; powdery mildew ; Sclerotinia sclerotiorum ; white mold ; Phaeoisariopsis griseola ; angular leaf spot ; Uromyces appendiculatus var. appendiculatis ; rust ; bean pests ; Heliothis armigera ; bolworm ; Systates pollinosus ; black beetle ; Aphis fabae ; aphid ; disease score ; pest score ; Kenya
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Samenvatting Bonen in mengteelt met mais vertoonden over het algemeen in vergelijking met bonen in monocultuur minder aantasting door de navolgende ziekten en plagen: vetvlekkenziekte, bonerolmozaïek, vlekkenziekte, gewone vlekkenziekte, schurft, zwarte knopensiekte, meeldauw, peulenboorder en, in mindere mate, veelhoekvlekkenziekte. Het tegenovergestelde was het geval voor sclerotiënrot en de bladrandkeverSystates. Roest en de zwarte bonenluis gedroegen zich wat wisselvallig in dit opzicht. Geconstateerd mag worden, dat door mengteelt met mais een soort teeltkundige behersing van de belangrijkste ziekten en plagen in Kenya wordt bewerkstelligd.
    Notes: Abstract Compared with mono-cultures, beans grown in association with maize showed generally less incidence of the following diseases and pests: halo blight, bean common mosaic, anthracnose, common blight, scab,Phoma, mildew, bolworm and to a lesser extent angular leaf spot. For white mold and the black beetleSystates the opposite was observed. Rust and aphilds were erratic in this respect. Apparently a kind of cultural control of the major bean diseases in Kenya is effected by growing beans in association with maize.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01976985
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