Interaction Effects of Sulfur and Nitrogen Fertilization on Physiology and Yield of Spring Wheat Under Semi-Arid No-till Condition.

Sulfur deficiency causes chlorosis of younger leaves and adversely affects performance and yield of wheat crop. The sulfur deficiency in field crops is on the rise in the MonDak Region (the Eastern Montana and Western North Dakota of the USA) because of a decrease in air pollution, an improved purity of agricultural chemical products, and a depletion in soil organic matter. We conducted an experiment to find out an optimum amount of sulfur and nitrogen for spring wheat under semi-arid no-till condition. The spring wheat was seeded at the rate of 44 thousand PLS ha^-1 under split plot design with nitrogen (0, 67, 112, 157, and 2002 kg ha^-1) as main plot and sulfur (0, 11, 22 kg ha^-1) as sub-plot. There were four replications and size of a sub-plot was 5.5 m × 4.5 m. The effects of sulfur, nitrogen and their interactions on physiology, growth, and yield are presented.