Essays on Soil

Sludge from Wastewater Treatment: A Natural Fertilizer for Pechay (Brassica rapa chinensis) Introduction Background of the Study Pechay (Brassica rapa chinensis) could grow for almost 15-20 cm tall and have wide leaves (Siemonsma & Piluek, 1994). Pechay would grow under any climate and could be produced throughout the year specially when the provided soil is…

Imagine being blinded by dirt and disoriented by wind. Imagine having to cover your faces whenever you left the house and having to cover your food whenever you ate. Well, welcome to the Dust Bowl. During the 1880s, farmers fled to the Southern Great Plans after hearing word that it was great for planting wheat….

Introduction Acid rain refers to a phenomenon in which “[precipitation] from the atmosphere [contains] higher than normal amounts of nitric and sulfuric acids”. The precipitation that results in acid rain comes from the pollution emitted by human activities, such as factories, electrical power plants and automobiles. Two main pollutants are sulfur dioxide (SO2) and nitrogen…

During the first decade of the twentieth century the world-wide demand for ammonia for use in fertilisers (in the form of nitrates) and in the production of explosives for use in mining and warfare could only be satisfied on a large scale from deposits of guano in Chile (2). Though this deposit was of huge…

Discussion The process of consolidation is often confused with the process of compaction. Compaction increases the density of an unsaturated soil by reducing the volume of air in the voids. Meanwhile, Consolidation is a time-related process of increasing the density of saturated soil by draining some of the water out of the voids. According to…

RESEARCH INFORMATION SERIES ON ECOSYSTEMS Volume 14 No. 2 May – August 2002 Propagation Management Of Herbal and Medicinal Plants by Eduardo B. Principe and Aurora S. Jose 2 Foreword This issue contains the first part of a series of information on the propagation management of medicinal plants. Medicinal plants abound in the country. They…

Microinstructions are consumed in smaller quantities and are present in plant tissue on the order of parts per million (pump), angina from 0. 15 to 400 pump DMS, or less than 0. 04% Only three other structural elements are required by all plants: carbon, hydrogen, and oxygen. These nutrients are supplied by water (through rainfall…

Agenda 21 is composed of 40 chapters that identify each challenge and propose simple realistic solutions towards sustainable placement which is: meeting the needs of the present without compromising the ability of future generations to meet their own needs. Section One: Social and Economic Dimensions Chapter 1 Preamble to Agenda 21: No nation can secure…