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  • 1
    Electronic Resource
    Electronic Resource
    Fungal abundance and diversity in earthworm casts and in uningested soil (1993)
    Springer
    Biology and fertility of soils 16 (1993), S. 131-134 
    Details
    ISSN: 1432-0789
    Keywords: Abundance ; Diversity ; Fungi ; Earthworm casts ; Uningested soil ; Pineapple
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Earthworm casts and adjacent uningested soil from 30 different locations were compared to determine the abundance and diversity of fungal species. The casts contained larger fungal populations (g-1 dry soil weight) and numbers of fungal species than the soil. Variations in these parameters between casts and soil were statistically significant (P=0.05). Fungal populations and the number of fungal species in casts and soil also varied significantly (P=0.05) between samples from different locations. A total of 27 fungal species were recorded from the casts and soil. Indices of dominance (0.084 casts; 0.14 soil) and general diversity (2.53 casts; 2.02 soil) demonstrated that the casts displayed more diverse fungal flora than the soil. The diversity of fungal species increased in earthworm casts after passing through the earthworm gut.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00369414
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  • 2
    Electronic Resource
    Electronic Resource
    Microbial populations, enzyme activities and nitrogen-phosphorus-potassium enrichment in earthworm casts and in the surrounding soil of a pineapple plantation (1989)
    Springer
    Biology and fertility of soils 8 (1989), S. 178-182 
    Details
    ISSN: 1432-0789
    Keywords: Earthworm casts ; Bacteria ; Fungi ; N, P, K ; Organic C ; Dehydrogenase activity ; Urease activity ; Phosphatase activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Total populations of bacteria and fungi, dehydrogenase activity (as a measure of total potential microbial activity), and urease and phosphatase activities were determined in earthworm casts and surrounding laterite soils planted to pineapple. The casts contained higher microbial populations and enzyme activities than the soil. Except for fungal populations, statistically significant (P = 0.05) increases were found in all other parameters. Microbial populations and enzyme activities showed similar temporal trends with higher values in spring and summer and lower values in winter. The earthworm casts contained higher amounts of N, P, K and organic C than the soil (P = 0.05). Selective feeding by earthworms on organically rich substrates, which break down during passage through the gut, is likely to be responsible for the higher microbial populations and greater enzyme activity in the casts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00257763
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  • 3
    Electronic Resource
    Electronic Resource
    A note on the unimodular theory of gravitation (1993)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 34 (1993), S. 2465-2467 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Since the covariant divergence law for the energy tensor in general relativity does not lead to a global conservation law one has the freedom to modify it. Rather than also assuming this law in the unimodular theory, invoking only the Bianchi identity, one ends up with a theory without the cosmological constant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.530131
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  • 4
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    The Blood Groups of the Brahmins and Rajputs of Garhwal (1968)
    Baltimore : Periodicals Archive Online (PAO)
    Human Biology. 40:3 (1968:Sept.) 386 
    Details
    ISSN: 0018-7143
    Topics: Biology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5243-1968-040-03-000008
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  • 5
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    KINETICS OF GENETIC KINSHIP AS INFERRED BY ISONYMY AMONG THE AHMADIYYAS OF KASHMIR VALLEY (1980)
    Baltimore : Periodicals Archive Online (PAO)
    Human Biology. 52:2 (1980:May) 311 
    Details
    ISSN: 0018-7143
    Topics: Biology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5243-1980-052-02-000012
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of organic manure and NPK fertilization on earthworm activity in an Oxisol (1993)
    Springer
    Biology and fertility of soils 16 (1993), S. 293-295 
    Details
    ISSN: 1432-0789
    Keywords: Casting activity ; Earthworm number ; Mineral fertilizer ; Organic manure ; pH ; Earthworm biomass ; Drawida assamensis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effects of fertilization with N, P, K, and organic manure (alone or in combination) on earthworm populations, biomass, and casting activity were measured in a cultivated soil (organic C 1.5%, annual rainfall 2000–2300 mm). These applications of fertilizer caused significant increases in earthworm numbers, biomass, and casts. N alone or in combination with P and K also influenced these earthworm parameters significantly. The inorganic NPK fertilizer in combination with organic manure had a significantly greater effect on earthworm activities than NPK fertilizer alone, and therefore the addition of organic matter appears advisable in order to obtain maximum benefits from NPK fertilizer in this soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00369307
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  • 7
    Electronic Resource
    Electronic Resource
    Okra production with pine straw mulch (1994)
    Springer
    Agroforestry systems 27 (1994), S. 121-127 
    Details
    ISSN: 1572-9680
    Keywords: agroforestry ; loblolly pine ; longleaf pine ; Hibiscus esculentus ; gumbo ; soil acidification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Conventional planted okra in Booneville, Arkansas and Lorman, Mississippi were mulched with loblolly pine straw (Pinus taeda L.) and longleaf pine straw (P. palustris Mill.), respectively, at a rate of 11 t/ha or left bare. At Booneville, plant stand, season yields (18.6 t/ha), pod weight (16.3 g), plant dry weight (2.3 kg), or stem diameter (3.5 cm) were not affected by the loblolly pine mulch. However, mulch application increased pod number (1.22 vs. 1.06×106/ha) and plant height (1.5 vs. 1.6 m), while reducing weed competition (0.05 vs. 0.40 t/ha) and visible plant stress, during periods of soil moisture deficits. Soil temperatures at 5 and 15 cm depth were reduced by mulch until mid-August when plant canopies covered the rows. Seasonal moisture at 30 and 45 cm depths was similar between mulched and bare soils, based upon unreplicated neutron probe measurements. At Lorman, season okra yield (29.8 vs. 24.6 t/ha), number of pods per ha (1.24 vs. 1.07×106) and weed competition were reduced and soil pH lowered 0.56 units by longleaf pine straw mulch. Mulch reduced early season yield at both locations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705469
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  • 8
    Electronic Resource
    Electronic Resource
    The influence of moisture regimes on the population and activity of soil microorganisms (1987)
    Springer
    Plant and soil 101 (1987), S. 133-136 
    Details
    ISSN: 1573-5036
    Keywords: bacteria and fungi population ; CO2-evolution ; dehydrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This paper deals with the influence of soil moisture on the fungal population, bacterial population, CO2-evolution and dehydrogenase activity. Correlation coefficients of various parameters of the soil with different moisture regimes are given. It is demonstrated that soil moisture significantly alters the microbial population, its activity and the relationships between various parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02371041
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  • 9
    Electronic Resource
    Electronic Resource
    Callose in the walls of mature embryo sac ofTorenia fournieri (1982)
    Springer
    Protoplasma 110 (1982), S. 1-4 
    Details
    ISSN: 1615-6102
    Keywords: Callose ; Embryo sac ; Torenia fournieri
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary During the course of a fluorescence microscopic investigation on the extra-ovular micropylar portion of the embryo sacs ofTorenia fournieri Lind. (Scrophulariaceae) a callosic wall was found which surrounded it almost completely until the time of anthesis. In addition, the walls of young synergids and the filiform apparatus also showed callosic fluorescence. Treatments with PAS reaction revealed a PAS-positive substance filling up the locular cavity. Our attempts to induce fluorochromasia by employing fluorescein diacetate failed, indicating the low permeability of the callosic wall around the embryo sac. It is assumed that the callose wall around the embryo sac isolates the latter from the contents of the locular cavity whereas the callose in the synergid walls may represent an intermediate stage in the maturation of these walls; the filiform apparatus is mainly composed of callose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01314674
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  • 10
    Electronic Resource
    Electronic Resource
    Colchicine inhibits plasmodium formation and disrupts pathways of sporopollenin secretion in the anther tapetum ofTradescantia virginiana L. (1986)
    Springer
    Protoplasma 133 (1986), S. 115-128 
    Details
    ISSN: 1615-6102
    Keywords: Cell fusion ; Colchicine ; Microtubules ; Plasmodial tapetum ; Sporopollenin secretion ; Tradescantia virginiana
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary During an earlier investigation, microtubules were observed at the periphery of invasion processes in the developing syncytial tapetum ofTradescantia virginiana L. They were also associated with membranous sacs that accumulate adjacent to tetrads, with putative fusion sites where the tapetal plasmodium is initiated, and, in postmeiotic stages, with the perispore membrane that encloses the developing spore cells. Colchicine was administered to developing flower buds to investigate the roles of these microtubules. The results indicate that microtubules neither initiate nor guide the tapetal invasion of the loculus. The treatments, however, resulted in absence of cell coat from invasion processes and prevention of cell fusion. They also inhibited polarized migration of membrane sacs and removed the associated microtubules. The development of an organized secretory apparatus at the perispore membrane was disrupted, with subsequent disordered deposition of sporopollenin in the extracellular spaces of the partially-fused plasmodium. The results suggest that microtubules participate in the formation and internal spatial organization of the tapetal plasmodium, and establishment of a secretory surface that normally produces sporopollenin at the tapetum-microspore interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304627
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