Some physical and chemical properties of lakes in north-eastern Norway

1970 ◽  
Vol 32 (1) ◽  
pp. 300-327 ◽  
Author(s):  
Anders Bøyum
Keyword(s):  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
North Eastern ◽  
Physical And Chemical ◽  
Eastern Norway ◽  
And Chemical Properties

scholarly journals Habitat requirements of Polygonetum natantis Soó 1927 and Potamogetonetum natantis Soó 1927 phytocenoses in north-eastern Poland

2014 ◽  
Vol 55 (1) ◽  
pp. 141-157 ◽  
Author(s):  
Stanisław Kłosowski ◽  
Henryk Tomaszewicz
Keyword(s):  
Plant Communities ◽  
Aquatic Plant ◽  
Chemical Properties ◽  
Habitat Requirements ◽  
Physical And Chemical Properties ◽  
Habitat Conditions ◽  
North Eastern ◽  
Physical And Chemical ◽  
And Chemical Properties

Comparison of habitats of <em>Polygonetum natantis</em> Soó 1927 and <em>Potamogetonetum natantis</em> Soó 1927 phytocenoses as regards physical and chemical properties of the water and substrate demonstrated that the habitat requirements of both these communities are different. <em>Polygonetum natantis</em> phytocenoses indicate a substrate poor in nutrient components and rich waters, whereas <em>Potamogetonetum natantis</em> patches, on the contrary, are evidence of fertile substrate and waters poor in biophilous components. The differences in habitat conditions demonstrated between the examined communities confirm the correctness of narrow classification of aquatic plant communities, based on floristic dominance.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

2017 ◽  
pp. 31-43
Author(s):  
Berta Ratilla ◽  
Loreme Cagande ◽  
Othello Capuno
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Chemical Properties ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

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