Change to ecosystem properties through changing the dominant species: Impact of Pteridium aquilinum -control and heathland restoration treatments on selected soil properties

Fulgoromorpha and Cicadomorpha (Hemiptera) infesting bracken (Pteridium aquilinum) The abundance of six species of leafhoppers and planthoppers infesting bracken Pteridium aquilinum was determined in SW Poland. The paper describes the insects associated with the plant on the basis of their ecological characteristics. The population dynamics of the dominant species Ditropis pteridis Spinola (Delphacidae) is plotted.

Download Full-text

Quantifying soil variability in GIS applications: II Spatial distribution of soil properties

International Journal of Geographical Information Systems ◽

10.1080/026937996137990 ◽

1996 ◽

Vol 10 (4) ◽

pp. 455-475 ◽

Cited By ~ 1

Author(s):

A. S. Rogowski

Keyword(s):

Spatial Distribution ◽

Soil Properties ◽

Soil Variability ◽

Gis Applications

Download Full-text

DIVERSITY AND DISTRIBUTION OF ORIBATID MITE FAUNA(ACARI: ORIBATIDA) IN THE FOREST FLOOR OF SATKOSIA BASIPALLY WILD LIFE SANCTUARY, ODISHA, INDIA

FLORA AND FAUNA ◽

10.33451/florafauna.v23i1pp137-151 ◽

2017 ◽

Vol 23 (1) ◽

Author(s):

SHELLEY ACHARYA ◽

ADITI DUTTA

Keyword(s):

Forest Floor ◽

Dominant Species ◽

Oribatid Mite ◽

Soil Condition ◽

Silica Content ◽

Soil Mites ◽

The Core ◽

Humid Condition ◽

Core Areas ◽

Wild Life

The studies were mostly concentrated in Nine forest ranges of the WLS including the core areas. The soil of this region mostly is dry, red and with iron and silica content. Though the soil mites are prevalent in moist humid condition, we got a diversed population of 20 different species under 14 genera which is less than average probably due to the soil condition. Protoribates magnus is the dominant species in this study. The species with larger ranges were Scheloribates curvialatus.

Download Full-text

Effect of Methods and Interval Irrigation in Addition Soil Surface Mulching on Some Soil Properties and Production of Date Palm Phoenix dactylifera L. in South of Basrah 1- Moisture content and salt distribution in the soil

Basrah Journal of Agricultural Sciences ◽

10.33762/bagrs.2016.116191 ◽

2016 ◽

Vol 29 (1) ◽

pp. 154-171

Author(s):

Abdulrahman D. S. Alhamd ◽

Ali .H. Theyab

Keyword(s):

Moisture Content ◽

Soil Properties ◽

Date Palm ◽

Soil Surface ◽

Phoenix Dactylifera ◽

Phoenix Dactylifera L ◽

Salt Distribution

Download Full-text

A Different Kind of Animal

10.23943/princeton/9780691195902.001.0001 ◽

2019 ◽

Author(s):

Robert Boyd

Keyword(s):

Cognitive Ability ◽

Cultural Adaptation ◽

Dominant Species ◽

Large Scale ◽

Human Beings ◽

Unique Combination ◽

Essential Ingredient ◽

Princeton University

Human beings have evolved to become the most dominant species on Earth. This astonishing transformation is usually explained in terms of cognitive ability—people are just smarter than all the rest. But this book argues that culture—our ability to learn from each other—has been the essential ingredient of our remarkable success. The book shows how a unique combination of cultural adaptation and large-scale cooperation has transformed our species and assured our survival—making us the different kind of animal we are today. The book is based on the Tanner Lectures delivered at Princeton University, featuring challenging responses across the chapters.

Download Full-text

Applying the Method of Lagrange Multipliers to Derive an Estimator for Unsampled Soil Properties

Scientific Research Journal ◽

10.24191/srj.v11i1.5416 ◽

2014 ◽

Vol 11 (1) ◽

pp. 15

Author(s):

Set Foong Ng ◽

Pei Eng Ch’ng ◽

Yee Ming Chew ◽

Kok Shien Ng

Keyword(s):

Soil Properties ◽

Lagrange Multipliers ◽

Unbiased Estimator ◽

Soil Property ◽

Minimum Variance ◽

Distance Method ◽

True Value ◽

A Site ◽

Method Of Lagrange Multipliers ◽

Inverse Distance

Soil properties are very crucial for civil engineers to differentiate one type of soil from another and to predict its mechanical behavior. However, it is not practical to measure soil properties at all the locations at a site. In this paper, an estimator is derived to estimate the unknown values for soil properties from locations where soil samples were not collected. The estimator is obtained by combining the concept of the ‘Inverse Distance Method’ into the technique of ‘Kriging’. The method of Lagrange Multipliers is applied in this paper. It is shown that the estimator derived in this paper is an unbiased estimator. The partiality of the estimator with respect to the true value is zero. Hence, the estimated value will be equal to the true value of the soil property. It is also shown that the variance between the estimator and the soil property is minimised. Hence, the distribution of this unbiased estimator with minimum variance spreads the least from the true value. With this characteristic of minimum variance unbiased estimator, a high accuracy estimation of soil property could be obtained.

Download Full-text