Document Type

Thesis - Open Access

Award Date


Degree Name

Doctor of Philosophy (PhD)



First Advisor

Paul E. Fixen


Several studies conducted in South Dakota have shown significant yield increases in wheat and barley due to chloride (Cl) fertilization. The effects of Cl on oat were evaluated in the greenhouse and two field experiments. Five cultivars and 3 KC1 fertilizer levels (0, 58, and 117 Kg ha-1) were tested in a factorial arrangement. In a second experiment, five N fertilizer levels (0, 34, 68, 102, 136 kg ha-1) and 2 KC1 fertilizer levels (0 and 135 kg ha-1) on oat (Benson) were tested in a factorial arrangement. The greenhouse study had 4 levels of Cl (0, 10, 20, and 40 mg 1-1) and two watering schedules (non-restricted and restricted). The objectives were: (a) determine if oat cultivars respond to Cl fertilization, (b) examine the effect of Cl on plant water relations (c) examine the relationship between Cl fertilization and crown rust infection, (d) evaluate the effected df N and Cl fertilization on grain yield and lodging, and (e) evaluate the antagonism between N03- and Cl- uptake. Chloride addition significantly increased oat grain yield at some sites. The addition of 32 kg. Cl ha1- gave near maximum oat grain yield. At the Cl responsive sites.

Library of Congress Subject Headings

Oats -- Fertilizers

Oats -- Yield

Plants, Effect of chlorides on



Number of Pages



South Dakota State University