scholarly journals Effect of seasonal variation on soil enzymes activity and fertility of soil in paddy fields of North Vanlaiphai, Mizoram, India

2018 ◽  
Vol 18 (2) ◽  
pp. 70-73
Author(s):  
C. Vanlalveni ◽  
R. Lalfakzuala
Keyword(s):  
Soil Nitrogen ◽  
Paddy Field ◽  
Soil Enzymes ◽  
Soil Samples ◽  
Available Phosphorus ◽  
Exchangeable Potassium ◽  
Growing Environment ◽  
Total Soil Nitrogen ◽  
Soil Enzymes Activity

For sustainability in agricultural productions, familiarity of soil quality and manual improvement to create the best possible growing environment for plants are extremely important. In this study the quality of soil of a paddy field in North Vanlaiphai was investigated with respect to the change in seasons throughout the year. A total of five (5) soil samples were selected from various places of the paddy field, and soil fertility indicators such as pH, total soil nitrogen (N), available phosphorus (Pav), exchangeable potassium (Kex), soil organic carbon (SOC), soil organic matter (SOM) and soil enzymes viz. dehydrogenase, phosphatase and urease were analyzed using standard protocols. All the parameters except available phosphorus and exchangeable potassium were found to be highest during rainy season whereas lowest in summer.

scholarly journals Dynamics of top-down factors with relation to ecological attributes of an endangered species Commiphora wightii

2016 ◽  
Vol 8 (3) ◽  
pp. 1556-1564 ◽  
Author(s):  
R. N. Kulloli ◽  
Manish Mathur ◽  
Suresh Kumar
Keyword(s):  
Soil Samples ◽  
Available Phosphorus ◽  
Top Down ◽  
Commiphora Wightii ◽  
Ecological Attributes ◽  
Soil Variables ◽  
Explanatory Factors ◽  
Ecological Variables ◽  
Total Soil Nitrogen

Present study was aimed to explore the influence of top down factors on ecological attributes of Commiphora wightii collected from seven districts of arid and semi arid parts of the Rajasthan. Ecological variables in respect of 46 accessions of this species were quantified. To assess the explanatory factors governing quantified ecological variables, soil samples were collected to analyze soil texture, soil EC, pH, available potassium, available phosphorus and total soil nitrogen. Results showed that there was a specific relationship between soil variables and occurence of C. wightii. The mid ranges of potassium (200-300 kg/ha) emerged as favourable to have better density and health of C. wightii: This is the first report on regulatory role of potassium on distribution and occurrence of C. wightii.

Study on the Comprehensive Evaluation of the Soil Fertility Quality of the Green Land in Qinhuangdao

2012 ◽  
Vol 573-574 ◽  
pp. 191-194
Author(s):  
Hai Rong Fan ◽  
Yan Po Li ◽  
Su Xia Wu
Keyword(s):  
Green Space ◽  
Comprehensive Evaluation ◽  
Soil Bulk Density ◽  
Soil Samples ◽  
Available Phosphorus ◽  
Index Method ◽  
Comprehensive Index ◽  
Comprehensive Index Method ◽  
Green Land

Soil samples with the green space soil in Qinhuangdao city were collected, and soil bulk density, pH,EC,organic matter,alkali-hydrolysable nitrogen,available phosphorus,available potassium were studied,and Nemero comprehensive index method was used to evaluate the soil fertility.The results indicated that the green space soil synthesis level was general.

The Potential of near Infrared Reflectance Spectroscopy as a Tool for the Chemical Characterisation of Agricultural Soils

2001 ◽  
Vol 9 (2) ◽  
pp. 123-131 ◽  
Author(s):  
M. Confalonieri ◽  
F. Fornasier ◽  
A. Ursino ◽  
F. Boccardi ◽  
B. Pintus ◽  
...  
Keyword(s):  
Total Nitrogen ◽  
Near Infrared ◽  
Reflectance Spectroscopy ◽  
Soil Samples ◽  
Available Phosphorus ◽  
Exchangeable Potassium ◽  
Near Infrared Reflectance ◽  
Nir Reflectance Spectroscopy ◽  
Soil Constituents

The feasibility of near infrared (NIR) reflectance spectroscopy in determining various soil constituents such as total organic carbon, total nitrogen, exchangeable potassium and available phosphorus has been investigated, to monitor their concentration during a long-term agronomic trial. Soil samples previously analysed by conventional chemical methods were scanned using a NIRSystems 5000 monochromator and spectra were treated using several algorithms. The first derivative of each NIR spectrum was used for all statistical analyses. Step-up, stepwise and modified partial least squares (MPLS) regression methods were applied to develop reliable calibration models between the NIR spectral data and the results of wet analyses. MPLS almost always gave the most successful calibrations. The results demonstrated that NIR reflectance spectroscopy can be used to determine accurately two important soil constituents, namely total nitrogen and carbon content. This technique could be employed as a routine testing method in estimating, rapidly and non-destructively, these constituents in soil samples, demonstrating soil variations within a long-term field experiment. For other determinations, such as exchangeable potassium and available phosphorus content, our results were less successful but may be useful for separation of samples into groups.

POTASSIUM AND PHOSPHORUS ACCUMULATION IN ORGANIC SOIL AND THEIR INFLUENCE ON POTATO CROPS

1964 ◽  
Vol 44 (3) ◽  
pp. 280-285 ◽  
Author(s):  
J. J. Jasmin ◽  
R. Tourchot ◽  
H. B. Heeney
Keyword(s):  
Leaf Tissue ◽  
Organic Soil ◽  
Available Phosphorus ◽  
Exchangeable Potassium ◽  
Total N ◽  
Phosphorus Accumulation ◽  
Potato Crops ◽  
Chipping Quality ◽  
Total Potassium

Repeated application of fertilizer over a 5-year period (1957–61) on organic soil producing potatoes resulted in large increases in exchangeable potassium and in moderate increases in acid-soluble plus absorbed phosphorus. Where potatoes were grown without application of fertilizer the exchangeable potassium decreased rapidly but the available phosphorus remained at a constant level.Fertilizer treatments influenced yields only in 1961, and per cent total N and P in leaf tissue only in 1961 and 1958 respectively. However, in all years the per cent total potassium in leaf tissue was in direct relation to rate of fertilizer applied and the percentage of Ca and Mg generally decreased as per cent potassium increased. The specific gravity and the general boiling quality of the tubers were adversely affected by heavy fertilization, but the chipping quality, the flavor, and the color of the flesh were not affected by soil fertility differences.

Effects of soil amendments on soil properties and population quality of rice in cold waterlogged paddy field

2013 ◽  
Vol 21 (7) ◽  
pp. 810-816
Author(s):  
Wen-Jun DONG ◽  
Pei-Zhi XU ◽  
Ren-Zhi ZHANG ◽  
Xu HUANG ◽  
Hua-Ping ZHENG ◽  
...  
Keyword(s):  
Soil Properties ◽  
Paddy Field ◽  
Soil Amendments ◽  
Population Quality

Effect of Prescribed Burning of Forest Litter on Total Soil Nitrogen

1962 ◽  
Vol 26 (2) ◽  
pp. 200-202 ◽  
Author(s):  
J. O. Klemmedson ◽  
A. M. Schultz ◽  
H. Jenny ◽  
H. H. Biswell
Keyword(s):  
Soil Nitrogen ◽  
Prescribed Burning ◽  
Forest Litter ◽  
Total Soil ◽  
Total Soil Nitrogen

scholarly journals Effect of Tillage System and Organic Matter Management Interactions on Soil Chemical Properties and Biological Activity in a Spring Wheat Short-Time Cultivation

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7451
Author(s):  
Barbara Breza-Boruta ◽  
Karol Kotwica ◽  
Justyna Bauza-Kaszewska
Keyword(s):  
Organic Matter ◽  
Biological Activity ◽  
Organic Carbon ◽  
Spring Wheat ◽  
Chemical Properties ◽  
Soil Samples ◽  
Available Phosphorus ◽  
Organic Carbon Content ◽  
Tillage System ◽  
Short Time

Properly selected tillage methods and management of the available organic matter resources are considered important measures to enable farming in accordance with the principles of sustainable agriculture. Depending on the depth and intensity of cultivation, tillage practices affect soil chemical composition, structure and biological activity. The three-year experiment was performed on the soil under spring wheat (cv. Tybalt) short-time cultivation. The influence of different tillage systems and stubble management on the soil’s chemical and biological parameters was analyzed. Organic carbon content (OC); content of biologically available phosphorus (Pa), potassium (Ka), and magnesium (Mg); content of total nitrogen (TN), mineral nitrogen forms: N-NO3 and N-NH4 were determined in various soil samples. Moreover, the total number of microorganisms (TNM), bacteria (B), actinobacteria (A), fungi (F); soil respiratory activity (SR); and pH in 1 M KCl (pH) were also investigated. The results show that organic matter amendment is of greater influence on soil characteristics than the tillage system applied. Manure application, as well as leaving the straw in the field, resulted in higher amounts of organic carbon and biologically available potassium. A significant increase in the number of soil microorganisms was also observed in soil samples from the experimental plots including this procedure.

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