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Registros recuperados: 1.174
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1966 Report of the Vocational Agriculture Farm Management Program in West Central Minnesota AgEcon
Hartog, Edward; Nodland, Truman R..
Tipo: Report Palavras-chave: Farm Management.
Ano: 1967 URL: http://purl.umn.edu/52686
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2-Amino-4-chloro-6-methylpyrimidine抑制氮肥硝酸化作用之研究(第1報) Taiwan Agricultural Research Institute
溫西濱; H.P. Wen.
[[abstract]]本試驗之目的為探討2-Amino-4-chloro-6-methylpyrimidine(簡稱AM)之施用對于水稻產量之影響,及對土壤中硝酸化作用之抑制效果,於1966年間採用直播栽培法舉行水稻盆栽試驗,並在實驗室內分析土壤中之NH3-N和NO3-N生成量,以究明所施尿素之銨化及硝酸化情形,測定AM之硝酸化抑制效果。 據盆栽試驗結果AM之施用對于稻谷之增收確有效果,土壤實驗結果示AM對尿素之銨化作用並無影響,但對其硝酸化卻有顯然抑制效果。 由以上結果可以推知AM在容易發生脫氮作用之環境下(如輪流灌溉地區或缺水地區水稻直播栽培)對于氮素肥料肥效之增進將有裨益。但實際應用效果如何尚待繼續試驗。 To test the effect of 2-Amino-4-chloro-6-methyl pyrimidine (A.M.) as a nitrifica-tion inhibitor in soil and its applicability in rice culture, a pot experiment under which loss of nitrogen by percolation and denitrification prevailed was conducted. A. M. was observed not to affect the rate of ammonification of urea, whereas the nitricfication was significantly suppressed by A. M. and the availability of the fertilizer applied for the plant was highly...
Palavras-chave: [[classification]]4.
Ano: 1967
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A CANBERRA VIEW OF ECONOMIC DEVELOPMENT IN NEW GUINEA AgEcon
Crocombe, R.G..
Tipo: Journal Article Palavras-chave: International Development.
Ano: 1967 URL: http://purl.umn.edu/22758
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A conspectus og the genus Allophylus (Sapindaceae). The problem of the complex species Naturalis
Leenhouts, P.W..
Allophylus, at present with c. 255 accepted species, is considered as one of the largest genera of the Sapindaceae. It is distributed throughout the tropics of the Old and the New World, and shows a wide ecological range. Although somewhat variable in vegetative characters, there is a striking homogeneity in fertile characters, by which the generic disposition is easily spotted all over the world. Specific delimitation is renowned difficult in this genus (chapter 2). An analysis of the revision given by Radlkofer in his monograph of the Sapindaceae in ‘Das Pflanzenreich’, Heft 98 (1931—34) reveals that the characters, accepted by him as diagnostic, are all extremely vague, and often grading or overlapping. Of course, the species defined by these characters...
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/525034
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A field study on the ecology of Centaurium vulgare Rafn Naturalis
Freijsen, Arnoldus Henricus Joseph.
In deze oecologische studie wordt een beschrijving en analyse gegeven van het milieu van de plantensoort Centaurium vulgare Rafn (Duizendguldenkruid). Voorzover mogelijk wordt aangetoond hoe de verspreiding en de wijze van voorkomen van deze plantensoort bepaald worden door de milieufactoren. Het onderzoek is gebaseerd op gegevens verzameld in het veld, vooral in de duinen en op de kwelders van het eiland Terschelling. Centraal in het onderzoek stond het object Centaurium vulgare, waarvan verschillende facetten besproken worden zoals de nomenclatuur, de morphologie, de levensloop, de variabiliteit en het areaal. De volgende belangrijke punten uit deze bespreking kunnen genoemd worden: De levenscyclus van Centaurium vulgare duurt twee jaren. Naast de...
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/534730
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A floristic study of forests and bog vegetation, Northwestern Minnesota Naturalis
Janssen, C.R..
Single vegetation plots in forests and bogs in the deciduous and coniferoushardwood formation in northwestern Minnesota were studied according to the field methods of the Zürich-Montpellier system. Plots and species were arranged so that the greatest coincidence of occurrences was obtained. Species that show approximately similar amplitudes were united in sociological groups. Plant communities typified by these groups were placed in a hierarchy. The plant communities appear to intergrade but are not completely continuous. Definite concentrations of occurrences remain present in the ordination. Fourteen main types of vegetation are recognized. Their relations to the environment are discussed, and their relations to vegetation in other regions are indicated....
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/534710
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A further contribution to our Oological knowledge of the Island of Java (Indonesia) Naturalis
Hellebrekers, W.Ph.J.; Hoogerwerf, A..
The present authors independently from one another studied oological material from Java. The results of their studies are combined in the present paper. Hellebrekers deals with three collections, held by the Rijksmuseum van Natuurlijke Historie at Leiden, brought together (a) by M. E. G. Bartels and his sons (4770 shells), (b) by J. G. Kooiman (280 shells), and (c) by H. J. V. Sody (175 shells). Of these collections those made by Bartels and Sody consist almost exclusively of eggs from West Java, while that made by Kooiman originates from East Java. Hoogerwerf gives details of 1020 shells of his own collection, almost all of which originate from West Java. These were obtained after the appearance in 1949 of a paper in which he published the colour...
Tipo: Article / Letter to the editor Palavras-chave: 42.83.
Ano: 1967 URL: http://www.repository.naturalis.nl/record/317794
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A ideologia da sociedade industrial Buscador Latinoamericano
por Hebert Marcuse; Marcuse, Hebert.
Tipo: Text Palavras-chave: SOCIEDADE INDUSTRIAL; CONTROL SOCIAL.
Ano: 1967 URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=12997&tab=opac&oai:flacso.org.ec:12997
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A monograph of the genus Barringtonia (Lecythidaceae) Naturalis
Payens, J.P.D.W..
A brief history is given on the circumscription and subdivision of Lecythidaceae and the position of Barringtonia. All aspects, also of auxiliary disciplines point to affinity with Myrtaceae but warrant separate family status. The conviction is that only one family is concerned, not two, or even three, as Knuth proposed. The subdivision of Lecythidaceae appears to meet with great difficulty. It does not seem to be possible to divide the family in tribes which would be restricted to the New and Old Worlds respectively, affinities running transoceanic. In the present revision of the genus Barringtonia 39 species are distinguished, 3 of which have one or a few new subspecies, varieties, or forms; three species are newly described. A survey is given of the...
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/525528
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A new combination and a new species in Saraca L. (Caesalpiniaceae) Naturalis
Wilde, W.J.J.O. de.
During a precursory study in the genus Saraca it became evident that the number of fertile stamens and the size and degree of persistency of the bracteoles are major characters in the delimitation of the species. The genus extends from India and Ceylon to S.W. China and Tonkin, and as far east as to Celebes. The Celebes material (4 collections) was found to represent a species new to science. In the group with 6—8(—10) stamens, and with small (2—8 mm long) bracteoles, of which the Indian material was hitherto mostly referred to Saraca indica L., it appeared that two species are concerned, viz.: I. Bracteoles erect, clasping the pedicel, persistent. India, Ceylon, E. Pakistan, Burma west of the Irrawaddy River; otherwise cultivated. Fig. 1A Saraca asoca...
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/525491
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A new combination in Fimbristylis (Cyperaceae) Naturalis
Kern, J.H..
Fimbristylis ovata (Burm .ƒ.) Kern, comb. nov. — Carex ovata Burm. ƒ. Fl. Ind. (1768) 194; Kük., Pfl. Reich, Heft 38 (1909) 103. — Cyperus monostachyos L., Mant. 2 (1771) 180. — Abildgaardia monostachya (L.) Vahl, En. Plant. 2 (1806) 296. — Fimbristylis monostachya (L.) Hassk., Pl. Jav. Rar. (1848; 61. — Iriha monostachya (L.) O. Kuntze, Rev. Gen. Pl. 2 (1891) 751. Burman’s description of his Carex ovata is very short: ‘Spica terminali ovata feminea. Missa ex Java’. Raymond, Mém. Jard. Bot. Montréal no 23 (1959) 78, suggested that the neglected name might be the correct one for Carex tricephala Boeck. (1875), the only Carex species of the area that would fit Burman’s description. To me this supposition seemed unlikely, as Carex tricephala is a very rare...
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/524661
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A new deep-sea ray from the Bay of Biscay Marine & Ocean Science
Forster, G.R..
A new species of Breviraja is described from a pair of fish caught by line at nearly 2500 m depth in the Bay of Biscay. Distinctive characters include: the sparse distribution of denticles and spines, small number of teeth, position and size of the orbits,and very pale dorsal surface.
Tipo: Article Palavras-chave: QL Zoology.
Ano: 1967 URL: http://sabella.mba.ac.uk/2445/
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A new species of Curvularia Naturalis
Aa, H.A. van der.
Curvularia papendorfii, isolated from South African soil, is described as a new species. This species is characterized by greater overall dimensions than in any of the known species, and a hilum to the spore that is not protuberant at all.
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/531656
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A new species of Roupala (proteaceae) in Suriname Naturalis
Mennega, Alberta M.W..
Arbor 8 m alta, altitudine pectoris 20 cm diam.; ramuli teretes, glabri. Folia coriacea, glabra, plana, late elliptica vel late obovata, apice obtusa, rotundata vel subacuminata, basi attenuata et in petiolum decurrentia, 9-12 cm longa, 5-7½ cm lata, statu sicco supra viridia, leviter nitida, infra olivacea, opaca, marginibus subrevolutis, integris; costa et nervi primarii utraque facie prominentes, nervi primarii infimi tenues, inconspicui, spatio brevi margine paralleli, ii paris secundi costae paralleli et valde proximi supra basin folii, tum divergentes sub angulo 30°, plus minusve recti inter costam et marginem et 1-1½ cm a margine remoti, nervis primariis paris tertii coniuncta in parte tertia superiore laminae; nervi primarii tenuiores singuli vel...
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/534788
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A new species of Scambicornus (Copepoda, Cyclopoida, Lichomolgidae) associated with a holothurian in Madagascar, with notes on several previously described species Naturalis
Humes, Arthur G..
A new lichomolgid copepod, Scambicornus lobulatus, associated with a holothurian, Bohadschia graeffei, is described from the region of Nosy Bé, Madagascar. Certain previously described species of Scambicornus in that area are redescribed in part. New host records are: S. campanulipes from Actinopyga lecanora and A. miliaris, S. idoneus from Argiodia nobilis and Holothuria scabra, S. modestus from Brandtothuria impatiens and either Microthele difficilis or Urodemas ehrenbergi, and S. tuberatus from Bohadschia marmorata.
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/504991
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A new species of shrimp, Rhynchocinetes hiatti (Crustacea, Decapoda) Naturalis
Holthuis, L.B.; Hayashi, K.-I..
The present paper describes a new species of the genus Rhynchocinetes from the Indo-West Pacific region. The species, R. hiatti n. sp., whose name has repeatedly appeared in print as a nomen nudum, is closely related to R. rigens Gordon from the Atlantic but distinguishable from the latter by the presence of pterygostomian spine, the peculiar colour pattern and other small differences.
Tipo: Article / Letter to the editor Palavras-chave: Crustacea; Rhynchocinetes hiatti n. sp.; Rhynchocinetes rigens Gordon; New species; 42.74.
Ano: 1967 URL: http://www.repository.naturalis.nl/record/330036
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A new species of Stichothamnion (Rhodophyta) from the West Indies Naturalis
Vroman, M..
The genus Stichothamnion (Rhodomelaceae) was described by Borgesen in 1930, on the basis of material from the north western coast of Gran Canaria (Canary Islands). During our investigation of marine algae collected from the Netherlands Antilles it appeared that on St. Eustatius (Lesser Antilles) an unknown species was gathered, that also has to be placed in the genus Stichothamnion. This material was of sufficient quality to allow a complete description of the species.
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/534941
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A note on two rays lacking part of the snout Marine & Ocean Science
Forster, G.R..
Two unusual specimens of Raja richardsoni Garrick from the N. Biscay area lacked part of the snout, apparently because it had been bitten off.
Tipo: Article Palavras-chave: QL Zoology; QH Natural history.
Ano: 1967 URL: http://sabella.mba.ac.uk/2458/
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A Palynological study in cocoid palms Naturalis
Punt, W.; Wessels Boer, J.G..
Because the palm family is almost entirely tropical with many species of a very great size, it has attracted only a few botanists to study them. As a consequence palms are poorly represented in herbaria and little understood in almost every respect. Notably their taxonomy is in a very poor condition since many taxa are described on inadequate material which allows only an arbitrary interpretation and, moreover, the family is grossly overnamed. Hence the second author (1965) proposed a large-scale lumping in his critical treatment of the Suriname palms. The present paper is intended to give some palynological evidence to support a few of these lumpings on the generic level. Palynological evidence shall especially be rewarding in the genus Attalea in the...
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/535031
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A pollen diagram from the Upper Holocene of Lower Magdalena Valley Naturalis
Wijmstra, T.A..
In this article the results of a pollen analytical investigation of a section in the tropical lowland of Colombia are discussed. The section has been taken from a lake in the lower course of the River Magdalena (fig. 1). This lake, called ”Cienaga de Morrocayal”, is situated about 20 metres above sea-level; the section represents the greater part of the Subatlantic, and in the course of this period there was a succession of humid and drier periods. These fluctuations seem to represent a cyclic phenomenon. Two C14 analyses of charcoal-samples from the peatlayers, found in this section, showed that these layers were formed at about 1470 A.D. and about 1230 A.D.
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/505798
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