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Seasonal changes in microbial biomass in soils cropped with palmarosa (Cymbopogon martinii L.) and Japanese mint (Mentha arvensis L.) in subtropical India (1995)

Patra, D. D. ; Chand, S. ; Anwar, M.

Springer

Biology and fertility of soils 19 (1995), S. 193-196

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ISSN: 1432-0789

Keywords: Microbial biomass C ; Biomass N ; Biomass P ; Seasonal changes ; Palmarosa ; Mentha arvensis

Source: Springer Online Journal Archives 1860-2000

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

Notes: Abstract Changes in microbial C, N, and P were investigated for 1 year in two soils with similar physicochemical properties but supporting different crops under subtropical conditions. One was cropped with palmarosa (Cymbopogon martinii L.) and the other with Japanese mint (Mentha arvensis L.). Both the season and the type of cropping had a significant influence on changes in the soil microbial biomass. In general, soil microbial biomass C, N, and P were highest in summer months and lowest in midwinter. Soil microbial biomass levels and microbial C:N and C:P ratios were higher and N:P ratios lower under palmarosa soil than under mint.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00336158

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Direct cubic spline with application to quadrature (1989)

Anwar, M. N. ; El-Tarazi, M. N.

New York, NY [u.a.] : Wiley-Blackwell

Communications in Applied Numerical Methods 5 (1989), S. 237-246

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ISSN: 0748-8025

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: This paper presents a formulation of a cubic spline that fits the first derivatives of a function at mesh points and the function value and its second derivative at the beginning of the interval. Error bounds for the function and its first three derivatives are derived over the whole interval. This formulation can be applied, in particular, to quadratures.