Browse on keywords: crop rotation WA grain
Search results on 03/18/18
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.
3875. Leggett, G.E. and W.L. Nelson. 1960. Wheat production as influenced by cropping sequence and nitrogen fertilization.. WA Agr. Expt. Sta. Bull. #608.
The average wheat yields resulting from annual cropping with optimum nitrogen fertilization were 13 bu/ac at Ritzville, 23 and Harrington and 29 at Dusty. The yields at Ritzville were too low for this practice to compete economically with the summer-fallow system. The average yields were high enough at Harrington and Dusty for this cropping system to be seriously considered. At Dusty annual cropping resulted in a yearly average yield of 6 bu/ac more than was obtained on fallowed ground. The yield of wheat following Austrian winter peas as a green manure crop at Dusty was greater than that obtained after alfalfa or sweetclover. Soil analysis revealed that nitrogen fertilization resulted in a carryover of nitrate-nitrogen for subsequent crops. This was especially notable under annual cropping and with high rates of application on summer-fallow. The protein content of the wheat was increased markedly by nitrogen fertilization. T: Nitrate-nitrogen in the soil before fertilization and the available soil moisture used by wheat as influenced by nitrogen fertilization cropping practice, Dusty. Yields of barley and wheat as influenced by alfalfa, sweetclover, and Austrian winter peas as green manure crops.
6117. Schafer, E.G., L.C. Wheeting and S.C. Vandecaveye. 1937. Crop rotations.. WA Agr. Expt. Sta. Bull. #344.
Evaluations of crop rotations conducted on plots at Pullman college farm, 1916-34. Bulletin is in two parts, Part I: effect of crop rotation on succeeding crops; Part II: effect of crop rotations on productivity of the soil. The highest average yield was the wheat/summer fallow rotation. Much variation was found in the N/C content of soil in the different plots under the same system of management. This bulletin contains an extensive amount of data. T: yield of winter wheat/summer fallow. Yield of winter wheat/peas. Yield of winter wheat/corn. Yield of spring wheat/peas. Yield of winter wheat/spring wheat/summer fallow. Yield of winter wheat/spring wheat/corn. Yield of winter wheat/spring wheat/sunflowers. Yield of winter wheat/spring wheat/potatoes. Yield of winter wheat/oats/corn. Yield of winter wheat/ sweetclover/peas.
6174. Severance, G., B. Hunter and P. Eke. 1930. Farming systems for eastern Washington and northern Idaho.. ID Agr. Expt. Sta. Bull. #173.
same as WA AES Bull. 244
6821. Thom, C.C. and H.F. Holtz. 1915. Time and method of tillage on yield and comparative cost of production.. WA Agr. Expt. Sta. Bull. #123.
Evaluates: corn and wheat alternatiing, fall plowing. Peas and wheat alternating, fall plowing. Wheat and summer fallow, fall plowing. Wheat and summer fallow, spring plowing, packed and not packed. Wheat and volunteer pasture, fall plowing. Wheat and summer fallow, late spring plowing, packed and not packed. Wheat and summer fallow, early spring disking, late spring plowing. Wheat and summer fallow, fall disking, late spring plowing. Wheat and summer fallow, fall plowing, late spring disking. The most profitable operation was corn and wheat. T: comparison of plot treatments with yield, cost, return, and net profit.