The effects of tree cover and soil nutrient addition on native herbaceous richness in a neotropical savanna

Biotropica ◽  
2021 ◽  
Author(s):  
Klécia Gili Massi ◽  
Chesterton Ulysses Orlando Eugênio ◽  
Augusto César Franco ◽  
William A. Hoffmann
Keyword(s):  
Soil Nutrient ◽  
Nutrient Addition ◽  
Tree Cover ◽  
Neotropical Savanna

Influence of stemflow and throughfall from common oak (Quercusrobur) on soil chemistry and vegetation patterns

1991 ◽  
Vol 21 (6) ◽  
pp. 917-924 ◽  
Author(s):  
Thomas Andersson
Keyword(s):  
Soil Chemistry ◽  
Soil Nutrient ◽  
Calcium Content ◽  
Nutrient Addition ◽  
Vegetation Patterns ◽  
Nutrient Input ◽  
Swedish West Coast ◽  
Sea Bottom ◽  
High Base ◽  
Common Oak

Vernal herb vegetation patterns and soil chemistry beneath common oak (Quercusrobur L.) on a former sea bottom with occurrences of calcareous clay on the Swedish west coast were investigated in relation to nutrient addition from bark, stemflow, and throughfall. Nutrient input from bark litter played a negligible role in differentiating soil nutrient and vegetation gradients. Instead, nutrient addition via stemflow seemed to be the main reason for considerably higher pH and calcium content near the stems, and for an altered herb composition, mainly consisting of Mercurialisperennis L. and Hepaticanobilis Mill., in the stem zone of many oaks. The effects of stemflow were not observed around thin-stemmed oaks, nor around oaks growing on soils with high base saturation. This suggests that old, broad-stemmed oaks with deep root systems, reaching more fertile, calcium-rich layers, can redistribute calcium via stemflow, thereby strongly affecting originally nutrient-poor topsoil, and as a consequence, also can regulate the herb composition near the stem.

HEALTHINESS OF OIL PALM PLANTATION TOWARDS SUSTAINABILITY OF ENVIRONMENT

2020 ◽  
Vol 7 (1) ◽  
pp. 21
Author(s):  
Faradina Marzukhi ◽  
Nur Nadhirah Rusyda Rosnan ◽  
Md Azlin Md Said
Keyword(s):  
Oil Palm ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Satellite Image ◽  
Vegetation Indices ◽  
Soil Nutrient ◽  
Oil Palm Plantation ◽  
Sustainable Environment ◽  
Moisture Analysis ◽  
The Relationship

The aim of this study is to analyse the relationship between vegetation indices of Normalized Difference Vegetation Index (NDVI) and soil nutrient of oil palm plantation at Felcra Nasaruddin Bota in Perak for future sustainable environment. The satellite image was used and processed in the research. By Using NDVI, the vegetation index was obtained which varies from -1 to +1. Then, the soil sample and soil moisture analysis were carried in order to identify the nutrient values of Nitrogen (N), Phosphorus (P) and Potassium (K). A total of seven soil samples were acquired within the oil palm plantation area. A regression model was then made between physical condition of the oil palms and soil nutrients for determining the strength of the relationship. It is hoped that the risk map of oil palm healthiness can be produced for various applications which are related to agricultural plantation.

Populations Dynamics of Soybean Insect Pests vs. Soil Nutrient Levels

Crop Science ◽  
1991 ◽  
Vol 31 (6) ◽  
pp. 1629-1633 ◽  
Author(s):  
J. E. Funderburk ◽  
I. D. Teare ◽  
F. M. Rhoads
Keyword(s):  
Insect Pests ◽  
Soil Nutrient ◽  
Nutrient Levels ◽  
Populations Dynamics
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