Agriculture on a large scale, Science

Agriculture on a large scale:

Crops had  to  be  planted and  harvested in  the  right season. Floods were a recurrent phenomenon  in the river valleys, for which it was essential to be prepared beforehand. The observation of sun and stars  to  fix the length of a year became so  precise  that  already  in 2700 B.C., the Egyptians were able  to  fix  it at 365.2422 days! Sumerians  and their successors  in Mesopotamia adjusted t'he solar (sun-based)  and lunar (moon-based) calendars through accurate observations.  They invented the sexagesimal system of 360 degrees in a circle (near enough to the days in  a year), 60 minutes in  an hour, 60 seconds in a minute.  The exercises were carried out using mathematical tables and ied to algebra and arithmetic of  the later epochs. Another occupation  that came to be very prestigious with  the growth of  cities was that of medicine.  Although the practice of medicine was limited to treating wounds, dislocations, fractures etc., the practitioners could successfully diagnose many diseases. They could compare cases with one another, notice different diseases and record them.  From such descriptions, orally passed on  to later generations, arose the sciences of  anatomy and physiology.  Practitioners  of medicine also had  the knowledge of plants and mineral substances to prepare drugs for various diseases. They grew plants and herbs for this purpose.  It is from this source  that the science of botany arose later. The basis for chemistry was laid in the observations  and practices of jewellers, metal- workers and potters.  They knew about at least nine chemical elements-gold,  silver, copper, tin, lead, mercury, iron, sulphur and carbon, and also about a variety of dry and liquid reagents.  The process of  smelting ores, of purifying metals, of colouring  them, of adding enamel%-all  involve complex chemical reactions  that were learnt by many trials and experiments. However, chemistry never rose to the rank of a recognised science  in  the 'Bronze Age.  

Posted Date: 9/27/2012 7:26:29 AM | Location : United States







Related Discussions:- Agriculture on a large scale, Assignment Help, Ask Question on Agriculture on a large scale, Get Answer, Expert's Help, Agriculture on a large scale Discussions

Write discussion on Agriculture on a large scale
Your posts are moderated
Related Questions
Ultraviolet Radiations : The ultraviolet (UV) light has higher energy than visible light. Hydrogen lamps, deuterium lamps and other sources of ultra-violet are used for a variety

Controlling Air Pollution: Now  let us  see, how air pollution can be controlled.  i)  Photochemical smog-eliminating  this would require large scale changes in life style

Explain physical barrier for External Defence Mechanism - Skin It provides nice protective covering to the body.  The outer layer- horny layer - contains dead keratinized cells

Explain Cephalic Phase or Neural Phase 45% of the total gastric secretion is discharged in this phase. The flow of juice occurs before food reaches the stomach. Sight of food,

Explain the Propulsive Movement The basic propulsive movement of the gastrointestinal tract is peristalsis. Peristalsis is the movement by which the gastrointestinal canal, hav

Which latitudes and dates would coincide with the longest duration of insolation: 50oNorth on June 21

QUESTION 1 (a) How did psychology emerge as a separate scientific field? (b) Elaborate on any two schools of Psychology QUESTION 2 Elaborate on the correlational met

The Feudal Society: The economic basis of  the feudal system was land, and the village was its economic unit. The feudal economy was dependent on local agricultural production

1. A patient with Chronic Kidney Disease (Stage IV), who makes very little urine, presents to the hospital with severe nutritional deficiencies.  You are starting her

Explain Cell - The Basic Unit of Life You must be aware of the fact that the cell is the basic unit of life. What do you understand by the term 'cell'? What are the components