Enhanced Efficiency Liquid Nitrogen Fertilizer Management for Corn Production

Table 6

Corn grain moisture, test weight, protein, and oil concentration response to nitrogen sources/placements at 84 kg·N·ha⁻¹. Data were combined over factors or years in the absence of a significant interaction. Surface treatments were no-tillage with surface applied nitrogen and deep treatments were strip tillage with deep banded nitrogen application.

N source placement	Moisture		Test weight	Protein			Oil
	F	S		2011	2012	2013
	g·kg^−1		kg·hL^−1	g·kg^−1
Surface UAN^†	187	194	55.7	72.9	100.9	67.9	34
Deep UAN	178	223	53.3	87.2	103	72	32.9
Surface NF	190	173	56.1	72	101.5	70	33.9
Deep NF	201	224	54.9	84.6	102.3	66.1	33.2
Deep AA	217	201	55.3	88.1	102.3	70	33.4
LSD ()^‡	42		NS	2.1			NS

^†Abbreviations: AA, anhydrous ammonia; F, fall; NF, Nitamin Nfusion; NS, not significant; S, spring; UAN, 32% urea ammonium nitrate. ^‡Fisher’s protected least significant difference at .