Question
The best combination for key earthen structures which
may be used for controlling soil erosion inside of natural agricultural watersheds located in dry 'land areas are;Solution
Graded bunds, Shelterbelts, and terracing are the methods for soil conservation
130 114 106 102 100 ?
3720 3842 ? 4092 4220 4350
...0Â Â Â Â Â Â 2 Â Â Â Â Â Â Â 6Â Â Â Â Â Â 12 Â Â Â Â Â Â 20Â Â Â Â Â Â Â ?
...17Â Â Â Â Â ? Â Â Â Â Â 2142 Â Â Â Â Â Â 12852 Â Â Â Â Â Â 64260Â Â Â Â Â Â 257040
...133    183    220    ?     263     273
...720    ?     240     180      144     120
...12 7 10 25 107 ?
...125 36 343 ? 729 100
...8   24    12    ?   18     54
10 59 ? 1169 3503 7001
...