Yields

The following data is based on 1k Land. It is land that gets either 10 inches of rain water 80% of which falls in crop season or 1 acre-ft/acre water 33% of which may evaporate in transit, effective water that is actually used by land is therefore 800 cubic meters per acre per year. The land gets no ground water. There is no spreading of artificial fertilizers. No pesticides are used. The seeds are traditional/pre-green-revolution. Only one crop per year happen, planted in spring and cultivated in autumn.

         Yields    Water Need     Total Water Need
     (kg/acre/yr)   (cu-meter/kg)  (cu-meter/yr)
              X       Y                XY

GRAINS:
Wheat        400    1.00              400
Rice        1000    5.00             5000
Millet       600    0.70              420         
Barley       600    0.70              420
Pulses       250    1.40              350

Veg-Oil     250    2.80              700
Spices       250    2.80              700
DryFruits    250    2.80              700
Sugar        500    1.40              700

Tea/Coffee   500    1.40              700
Cotton       250   10.00             2500

Grass-Hay   1500    0.70             1050

Fruits      1000    0.70              700

Veg         1000    0.70              700

Notes:

(i)In some crops not all of the effective water is used. Such crops includes wheat, millet, barley, pulses etc, the so-called dry crops. Due to their less use of water these crops can sometimes be planted in dry weather of winter where rainfall is less than summer. These crops can also be planted in poor land having only 400 cubic meters water. It not means that the yield would be same in poor quality lands. The traditional seeds of dry crops unlike the green-revolution seeds are not capable of using all of the available water.

(ii)In case of fruits 700 cubic meters water is used out of the available 800 cubic meters, the rest is used by grass and weeds that grows in places between trees.

(iii)In case of grass more than 800 cubic meters of effective water is used. Due to the typical net-like pattern made by grass roots underground water absorption in ground is reduced.