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Relative effectiveness of various types and methods of zinc application on rice and maize crops grown in calcareous soil (1983)

Singh, A. P. ; Sakal, R. ; Singh, B. P.

Springer

Plant and soil 73 (1983), S. 315-322

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ISSN: 1573-5036

Keywords: Organic manures ; Residual effects ; Rice ; Yield ; Zinc application ; ZnO suspension

Source: Springer Online Journal Archives 1860-2000

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Summary Application of zinc sulphate mixed with compost/poultry manure proved to be equivalent to the effect of dipping the seedling roots in 4% ZnO suspension with respect to rice yields but Zn-amended organic manures were superior to other treatments with regards to total Zn uptake. A marked residual effect of soil applied treatments was recorded on the succeeding maize crop. Application of poultry manure alone was about one and a half times more effective than compost alone in increasing the rice and maize grain yields. Poultry manure surpassed compost in increasing zinc uptake by the crops and at the same time it built up more available Zn in soil than compost for the following crop. The magnitude of yields and Zn uptake response were magnified when zinc sulphate was applied along with organic manures. Application of 25 kg zinc sulphate/ha alone had the same effect as 50 quintals poultry manure alone or 12.5 kg zinc sulphate applied with 50 quintals compost/ha with respect to crop yields. A significant positive correlation was, recorded in both the crops between Zn concentration in grain or straw and their respective yields.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02184307

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Reactivity ratios of some substituted aromatic amines by linear graphical methods (1983)

Chatterjee, S. K. ; Singh, B. P. ; Pachauri, L. S.

Weinheim : Wiley-Blackwell

Angewandte Makromolekulare Chemie 115 (1983), S. 103-114

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ISSN: 0003-3146

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Description / Table of Contents: Die Copolymerisationsparameter einiger halogensubstituierter aromatischer Amine wurden nach der Methode von Kelen-Tüdős und Fineman-Ross graphisch bestimmt. Bei der Copolymerisation mit den Comonomeren p-Toluidin oder p-Nitrophenol erwies sich die Reaktivität der halogensubstituierten aromatischen Amine in der Reihenfolge der Basenstärke ansteigend. Jedoch kehrt sich diese Reihenfolge um, wenn diese halogensubstituierten Amine mit p-Nitroanilin copolymerisiert werden. Diese Umkehr der Reaktivität wurde mit der Polarisation und Resonanzstabilisierung der Monomeren erklärt.

Notes: Reactivity ratios of some halogen substituted aromatic amines have been determined by using Kelen-Tüdős and Fineman-Ross linear graphical methods. On copolymerization with p-toluidine or p-nitrophenol as comonomer, the reactivity of halogen substituted aromatic amines was found to be in the order of their basic strength. However, this order of reactivity gets reversed when these halogen substituted amines are copolymerized with p-nitroaniline. This reversal of reactivity has been interpreted in terms of polarization and resonance stabilization of the monomeric species.

Additional Material: 15 Ill.