apply the standard yields given in Sch.C. This Shfvd1u Singh means that if the yield of a particular farm of · v. irrigated land is, for example, 15 maunds of wheat,' 1111 Slat1 of PunJab ·- per acre, the Commision would be bound under . Wa11ollHJ. the proviso to give 80 per centum of the marks provided for yields in Sch. B i.e. the. Commission will have to award 250 out of 500 marks to such a farm. Now if land whether irrigated.or unirrigated was of one quality and if there were no other factors to be taken into consideration in judging thll yield in a particular area the application of a mathematical for-mula would have been justified. But there is no doubt that irrigated and unirrigated lands are not all of the same quality and that quality of land does affect production. There are other factors also to which we shall later refer which have to be taken into account in considring the yield; but those factors have all . been ignored in Sch.C. Turning to the quality of land, we find from Sch.A to the Rules, which has been framed with respect to r. 5 for conversion of ordinary acres into standard acres, that there ·are ; eight qualities of land in the State, of which five are under the head "irrigated'', (namely, · Ohahi, Ohahi-Nehri, Nehri perennial, Nehri non-perennial and Abi) andthree under the head "unirrigated" (namely, Sailab•,Barani and Bhud). The higest quality is Nehri perennial and it is marked as 100 meaning thereby that one ordinary acre of Nehri perennial is equal to one standard acre. The lowest quality - of irrigated land is Nehri non-perennial which is marked as 75, meaning thereby that four ordinary acres of Nehri non-perennial are equal to three standard acres. This means that the yield of the · lowest quality of irrigated land would be 25 per _ oentum less than the best irrigated land. Now if the standards fixed in Sob. C are with reference to the best land, the best irrigated land is expected to prod11ce SO rnaunds minus 20 :per centum i.e, 24 rnau!lgs,