laser land levelling is a precision land lecling tecnology..
Precision land leveling (PLL) is a mechanical process of grading and smoothing the land to a precise and uniform plane surface at grade or no grade (zero slope) with variation of less than 2cm. The LASER technology has proved to be a highly efficient tool for achieving a high degree of precision for carrying out PLL operations in much lesser time.

parts :-

1-laser recevier

2-laser beam

3-laser transmitter

complete system of laser land levellinf

operation system

transmeter

transmeter

Back view

parts of laser land levelling 

a complete figure of laser land levelling

a schematic diagram of drip irrigation system ...very hepfull to understanding the system of drip irrigation....

Drip irrigation

Drip irrigation,

Drip irrigation, also called as trickle/micro irrigation, is the most efficient technology that makes highly effective use of water, fertilizers, and other nutrients for crop production. Its main principle is to apply water and other inputs slowly, regularly, and frequently as close to the plant roots as possible through emitters installed on plastic pipes laid out in the field.

This system is most suitable for orchards and vegetables

Density of Materials

Research Proposal Flow Chart

A Brief History of Lawn Mower......how development done in this context...