Browse on keywords: moisture nitrogen fertilizer
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3652. Kmoch, H.G., R.E. Ramig, R.L. Fox, and F.E. Koehler. 1957. Root development of winter wheat as influenced by soil moisture and nitrogen fertilization.. Agronomy J. 49:20-25.
Although there was little top growth in November, root development was extensive for all moisture treatments. Roots which developed under less favorable moisture conditions were finer and had more and longer branches. April samples revealed that the primary root system was in the process of decay. Living roots were generally confined to regions of moist soil. Total weight of roots was highest where nitrogen had been applied. June samples revealed roots to a depth of 13 feet where moisture conditions were favorable. There was evidence of moisture depletion to a depth of 8'. N fertilizer increased root weights and moisture utilization at all moisture levels.
3865. Leggett, G.E.. 1959. Relationships between wheat yield, available moisture and available nitrogen in eastern Washington dryland areas.. WA Agr. Expt. Sta. Bull. #609.
The purpose of this work is to demonstrate the relationships which exist between (1) available moisture and wheat yield and (2) available nitrogen and wheat yield. Using these relationships, it is possible to calculate the amount of fertilizer nitrogen necessary to obtain maximum wheat yield if the supply of available nitrogen in the soil and the amount of moisture available for the crop can be estimated. The results of 90 fertility experiments conducted on dryland wheat in eastern Washington during the period 1953-1957 were used to determine the relationship between wheat yield and available moisture. The results of 62 experiements were used to determine the relationship between wheat yields and available nitrogen. It is possible to calculate nitrogen fertilize recommendations from the results of soil tests for nitrate-nitrogen and available soil moisture by use of these relationships.
5396. Jackson, G.D. and J.R. Sims. 1977. Comprehensive nitrogen fertilizer management model for winter wheat.. Agron. J. 69:373-377.