Page 204 - The Chemistry and Fertility of Soils Under Tropical Weeds Book_Neat

THE Chemistry and fertility of soils
under tropical weeds

Abdul kadir salam and nanik sriyani

A great deal of researches reveals that the presence of weeds modifies the chemistry and fertility of soil
environment. The chemistry and fertility of soils affected by weeds may include soil reaction and other
soil properties affected by the changes in soil pH like soil cation exchange capacity, the soil enzymatic
activities such as those of phosphatases, ureases, arylsulfatases, and b-glucosidases, the soil
exchangeable potassium, the soil organic carbon, phosphorus, nitrogen, and sulfur contents, and the
heavy metal solubility. This book deals with these kinds of soil chemical and fertility properties under
various tropical weeds mostly investigated in the Province of Lampung Indonesia.

This book is organized into nine chapters. Chapter 1 (Introduction) briefly focuses on the interrelationship
between the chemistry of soils and the existence of plants and weeds in the soil environment. Chapter 2
(The Soil – Weed Interrelationships) describes more specifically the interrelationship between the
chemistry of soils and the growth of weeds while Chapter 3 (The Important Facts about Tropical Weeds)
briefly describes the important weeds of the tropics: their concepts, their effects, invasion and
dominance, and their control and management. Chapters 4 - 9 deal with the effects of weed presence on
the chemistry and fertility of soils that include soil pH and soil enzymatic activities (Chapter 4: Effects of
Forest Conversion, Chapter 5: Effects of Tropical Weeds on Soil pH and Enzymatic Activities), soil contents
of carbon, phosphorus, and sulfur(Chapter 6: Effects of Tropical Weeds on Soil Carbon, Nitrogen,
Phosphorus, and Sulfur), soil exchangeable potassium (Chapter 7: Effects of Tropical Weeds on Soil
Potassium), and heavy metals (Chapter 8: Effects of Tropical Weeds on Heavy Metals). Chapter 9 (Closing
Remarks) highlights some important conclusions related to the effect of weed existence on the chemistry
and fertility of soils.

Abdul Kadir Salam is a Professor of Soil Science in the Faculty of Agriculture, the
University of Lampung, Indonesia (since 2001); earned her bachelor’s degree (1984)
from Bogor Agricultural University, Indonesia, Master’s degree (1989) and Doctor of
Phillosophy(1993) from the University of Wisconsin-Madison USA, and participated in
Posdoctoral Program (1995-1996) in Nagoya University, Nagoya, Japan.

Nanik Sriyani is a Professor of Weed Science in the Faculty of Agriculture, the
University of Lampung, Indonesia (since 2010); earned his bachelor’s degree (1984)
from Bogor Agricultural University, Indonesia, Master’s degree (1989) and Doctor of
Phillosophy(1993) from the University of Wisconsin-Madison USA, and the Chair of
Weed Science Society of Indonesia (2018-2020).

globalmadani press
2019
jalan kavling raya no. 1, pramuka,
rajabasa bandar lampung
telf. 0721-8011325