Yves Martineau1, Gilles Moreau2, George Read1, Jacques Lavoie3, Ron Pond1 and Marc Robichaud1
Abstract: A study was conducted at Drummond, Victoria county New Brunswick, in 1996, to determine the optimal nitrogen rate of application and plant density under drip irrigation for the processing potato variety Russet Burbank. Both total and marketable yields were respectively higher by 40.7 and 28.7 Cwt/Acre when soil moisture was maintained between 35 % allowable depletion and field capacity. Increasing the nitrogen rate of application above the recommended rate had no significant effect on the total and marketable yield, under supplemental irrigation, but increased the yield in tubers greater than 10 oz. There was no advantage in reducing the plant spacing, under both rainfed and irrigated conditions.
1Land Resources Branch, NBDARD, Fredericton, NB E3B 5H1
2McCain Foods (Canada), Grand Falls, NB
3Regional Office, NBDARD, Grand Falls, NB E3Z 1G1