I have studied your replies and would suggest you to avoid using plastic films which have an low life and gets torn/flutters away due to winds and promote cattle deaths as these torn bits get mixed with the waste plants , shrubs, grass etc.
Further I would suggest you to use PP woven fabric black uv stabilised mats for mango trees- 3 mtr x 3mtr only.
Some specific advantages are :
1.Being woven due to microholes it shall maintain air flow to roots of the trees and helps in having microclimatic control at root level.
2.Being black in color, it prevents weed growth around trees thus saving fertiliser from being leached by weeds/grass.
3.Water conservation is also achieved as it does not allow evaporation and water moistness is being maintained at root levels.
4.Due to soil moistness we need not operate drip irrigation system continuously throughout the day but only twice a day-early morning and late evenings only as seen by some farmers in Mexico etc where we are on visit now.
5.If handled carefully, the mats can be used for minimum 2 yrs or more .Laying of mats also is best done without anyhole punching in the centre of mats but only an slit .Farmers here explain that weed growth is like cancer - a small footing near tree roots and irt spreads rapidly-hence no openings near trees are covered by slit methods here locally.
6.Enclosing an photo taken of use of black woven fabric for kinnows fruits done in Haryana also- it is similar to oranges here.
This is for your information.