Nitrogen Timing Treatment Comparison

Program Contact: Tianna DuPont, Regional Specialist, Tree Fruit
(509) 663-8181 • tianna.dupont@wsu.edu

A summary of how the tree and fruit measurements within each Nitrogen timing treatment compared to the measurements taken in the other four.

Treatments started in August, 1993. Measurements taken in 1995.
By Tim Smith

 

TREATMENT Each Year BELOW AVERAGE AVERAGE ABOVE AVERAGE
0.25 LB. N PER TREE IN NOVEMBER, PLUS 0.15 LB. PER TREE IN MAY. Return bloom.N weight in flower.Flower size.

Borse leaf size.

Yield.

Firmness.

% N in Spring borse leaf.% N in August leaf.Fruit size.

Skin color.

Flesh color.

Sugars.

Acids.

Starch.
0.5 LB. N PER TREE ABOUT AUGUST 20 Flesh color. (very slightly greener) Fruit size.Skin color.Firmness.

Starch.

Sugars.

Acids.

Return bloom.N weight in flowers.Flower size.

% N in Spring borse leaf.

Borse leaf size. % N in August leaf.

Yield.

0.1 LB. N PER TREE EACH WEEK FOR 4 WEEKS, STARTING ABOUT AUGUST 20- (TOTAL OF .4 lb. N per TREE.) . Fruit size.Firmness.Skin color.

Flesh color.

Starch.

Sugars.

Acids.

Return bloom.Flower size.N weight in flower.

% N in Spring borse leaf.

% N in August leaf.

Yield.

0.3 LBS. N PER TREE ABOUT AUGUST 20 Return bloom.% N in August leaf.Yield. N weight in flower.% N in Spring borse leaf.Borse leaf size.

Fruit size.

Skin color.

Starch.

Sugars.

Acids.

Flower size.Borse leaf size.Firmness.

Flesh color. (very slightly less green.)

0.15 LB. N PER TREE ABOUT AUGUST 20, PLUS .15 LB. PER TREE IN MAY. Return bloom.Flower size.N weight in flower.

% N in Spring borse leaf.

Borse leaf size.

Yield.

Fruit size.

% N in August leaf.Flesh color.Starch.

Sugars.

Firmness.Skin color.Acids.

 

empty empty

Washington State University