Browse on keywords: fertility nitrogen grain protein
Search results on 06/18/18
26. Lerch, R.N., K.A. Barbarick, D.G. Westfall, R.H. Follett, T.M. McBride, and W.F. Owen. 1990. Sustainable rates of sewage sludge for dryland winter wheat production. 2. Production and income.. J. Production Agric. 3:66-71.
A sewage sludge application rate of 3 T/ac on hard red winter wheat increased gross income by an average of $45/ac/year compared to wheat grown with the typical 50-60 lb fertilizer N/ac. This was primarily due to premiums paid for higher grain protein. Grain levels of P an Zn were increased by sludge application, while levels of Cd, Ni, and Pb have remained low.
2033. Fowler, D.B. and J. Brydon. 1989. No-till winter wheat production on the Canadian Prairies: timing of nitrogen fertilization.. Agron. J. 81:817-825.
Tested the effect of timing of a broadcast application of ammonium sulfate on grain and protein yield and protein concentration. Lower grain yield, grain protein yield and grain protein concentration were attributed to loss of fall applied N in four trials. Increased grain protein concentration was often associated with delayed N availability. Reduced grain and grain protein yield, and increased grain protein concentration were observed for fall and early spring N applications in trials that experienced favorable spring weather followed by a prolonged drought.
2756. Huggins, D.R., W.L. Pan, and J.L. Smith. 1989. Improving yield, percent protein, and N use efficiency of no-till hard red spring wheat through crop rotation and fall N fertilization.. Proceedings, 40th Far West Fertilizer Conference,.
In a field experiment near Pullman, WA, all fall and split fall-spring N applications significantly increased percent protein and N uptake efficiency as compared to all spring applications, while yields were unaffected. Protein increase was attributed to enhanced late season uptake, due to better positional availability of deep soil N. In another experiment, yield of hard red spring wheat was 10% greater when no-tilled into Austrian winter pea stubble (for seed) as compared to winter wheat stubble, while grain N and percent protein were not affected. The difference in yield was not eliminated by optimized N rates, indicating other rotation effects.
7885. McGuire, C., R. Lockerman, R. Speilman, L. Welty, L. Prestbye, R. Engel, J. Sims, and J. Bunker. 1989. Nitrogen contribution of annual legumes to the grain protein content of Clark barley production.. Applied Agric. Res. 4:118-121.
8598. Vaughan, B., D.G. Westfall, and K.A. Barbarick. 1990. Nitrogen rate and timing effects on winter wheat grain yield, grain protein, and economics.. J. Production Agric. 3:324-328.
The study compared winter wheat grain yields, protein, and economic returns associated with fall, spring, and split applications of N fertilizer at rates of 0, 20, 40, and 60 lb N/ac at 19 sites over 3 yr in eastern Colorado. Spring-applied N increased grain yields and protein more than fall- and split-applied N. About 1.2 lb N/ac fall applied were equal to 1 lb N/ac spring applied to achieve similar production. Spring-applied N was the most profitable choice.