Nitrogen for no-tillage corn in Virginia: Sources and time of application
Titel:
Nitrogen for no-tillage corn in Virginia: Sources and time of application
Auteur:
Moschler, W. W. Jones, G. D.
Verschenen in:
Communications in soil science and plant analysis
Paginering:
Jaargang 5 (1974) nr. 6 pagina's 547-556
Jaar:
1974
Inhoud:
No-tillage corn (Zea mays L.) culture normally entails the placement of N fertilizer on the soil surface without mechanical incorporation. This field investigation was conducted to compare the N fertilizers that are most widely used in Virginia, when applied in this manner, for their effectiveness in producing notillage corn. Comparisons of the time of applying NH4NO3 were also made. Grain and stover yields, in addition to N removed in the crop, were used to draw conclusions. The experiments were conducted on both fertile and infertile soils in 1972 and 1973, both of which were relatively wet years. The fertilizers tested, urea, NH4NO3, and N solutions, were equally effective, per unit of N applied. Split applications of NH4NO3 showed no statistically significant advantage over all applied at planting but slightly trended to do so. N deficiency reduced grain yields relatively more than stover yields.
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