Woburn irrigation, 1951–59 III. Results for rotation crops

Abstract

Potatoes1951–53, Ulster Chieftain; 1954–56, Majestic, came after spring barley, with threefold replication of four irrigation treatments. All plots received the same basic P and K dressing, and half-plots got N dressings at N₁= 0·5, N₂ = 1·0 cwt. nitrogen/acre. Under main crop all plots received farmyard at 15 tons/acre, in addition. The ‘early’ potatoes were lifted about mid-July: the main crop at the beginning of October, a few weeks after killing of the haulms by a spray.