1. It is always sensible to fence your "commercial" farms using a combination of Concrete Pole + galvanised Chain Link Fencing, upto a height of 5 feet from flat ground level.
2. The above concrete poles should be placed 2 meters apart, and ground base MUST be fixed approx. 2 feet under the ground using a concrete mixure of Cement + Gravel + Sand + Stones.
3. After this the Chain Link should be fixed. It is worthless to fix barbed wire, since the other local cattle-feeding villagers jack up the barbed wire using a wooden "y" pole in the night and allow the hens + goats + cows + bulls + sheeps to gain inside the green farms. Further the barbed wire can be more easily cut at one end and render the whole fencing useless, when compared to chain link fencing.
4. [size=140][color=red]Chain link fencing has the advantage of stopping everything from coming inside the farm, including hens, rabbits, goats, sheep, cows, bulls and so on[/color][/size][/size]. This is hardly 10-15% costlier than a barrbed wire fencing, but definetly worth the cost in the immediate and long term. Chain link fencing has immediate advantages and effective from day one itself.
5. [color=red][size=140]Natural fencing is "NOT" effective from day one and takes years to grow or to be effective and is commercial not viable[/size][/color], due to high recurring costs, to maintain and replantations. AND further there are always sufficient gaps for small/big animals/birds to come inside the farm, and causing loss to commercial crops/plants.
6. After installing the Concrete pole + Chain link fencing, farmers should further install double layered "natural fencing" using various types of cactus + thorny plants, just touching the "inside" of the chain link fencing and should be allowed to grow wild for a depth of two feet wide, till ALL the stems become atleast 1-2 inches thick and only after this the natural fence bushes should be trimmed, but only during start of monsoon, after which the trimmed branches should be immediately planted in the gaps that may occur.
7. If it is a residential farm house / bungalow (i.e. not a commercial farm), THEN DO NOT MADE NATURAL FENCE USING THORNY PLANTS.
8. Some of the different type of thorny plant/s that can be used are "Karonda" (Carissa carandas), Shikakai, Lemon, boiganvila, raspberry, wild rose, Hawthorne, Hardy Orange, Black Locust, Pyracantha, Barberry, drawf bamboos, Asparagus, Datura, Thorny staff tree, Guggul, Henna and so on.
Keep Smiling .... Hemant Agarwal