Browse on keywords: economics wheat yields
Search results on 10/15/18
7722. Young, D., A. Chaudhry, and F. Xu. 1987. Price, yield, gross returns, and harvested acres time series for crops in Washington state, Whitman County, and the Columbia Basin.. Agr. Economics Staff Paper AE 87-1.
This is the most recent compilation of crop price and yield data. Most tables report data back to the early 1950's.
9913. Sargent, R.L.. 1987. Wheat Outlook, 1987.. Paper presented at Ag. Outlook Conference, Pasco, WA, Feb. 27, 1987..
This paper was presented at the Agricultural Outlook Conference in Pasco, WA. It discusses the increasing world wide wheat yields and the decreasing trend of world utilization, resulting in continuously rising carryovers. Mr. Sargent projects continued rising yields and is doubtful that any significant action will occur to solve the surplus problem. He feels greater attention should be given to the demand side.
10070. Mahler, R.. undated. Catena management in northern Idaho.. unpublished handout for Extension agent training.
In northern Idaho, water is often not limiting to crop production. Also, nutrient use efficiency is lower than in drier areas. Where annual precipitation is <17", fall application of all N fertilizer is best. But as rainfall increases, nutrient use efficiency can be increased by applying a greater share of N in the spring. Fertility experiments have shown that growers are probably underfertilizing bottomland positions and overfertilizing slopes for maximum net return from fertilizer. Several questions need to be answered to help improve nutrient efficiency. Is the value 2.7 lb N/bu wheat linear? Research results indicate that only 2.4 lb N/bu is needed at 80-90% of maximum yield. Is residual N used as efficienctly by plants from surface layers versus subsurface layers? What is the best approach to estimating N mineralization rates in a soil? Rates in northern Idaho can vary as much as 100% depending on weather conditions.