Evaluating the Impact of Starter Fertilizer on Winter Canola Grown in Oklahoma

Table 3

Canola grain yield as influenced by seed-placed diammonium phosphate (DAP) and nitrogen (N) application method at Lahoma and Perkins, OK, in 2011–2013.

Treatment	DAP with seed	N/P in DAP	Preplant N	Topdress N	Lahoma		Perkins
					2011-2012	2012-2013	2011-2012	2012-2013
	kg ha^−1
1	0	0/0	0	0	1558	568	467	259
2	0	0/0	56	84	1338	1753	543	364
3	0	0/0	56N/14P	84	1175	2194	395	1324
4	17	3/3.5	53	84	1048	1721	752	938
5	34	6/7	50	84	1290	1826	212	751
6	51	9/10.5	47	84	1718	1708	375	1120
7	67	12/14	44	84	1610	1764	272	1107
8	84	15/17.5	41	84	1399	1426	339	1064
9	0	0/0	0	140	1423	2106	387	309
10	17	3/3.5	0	137	1629	2017	400	997
11	34	6/7	0	134	1748	1976	336	1784
12	51	9/10.5	0	131	1257	2012	352	989
13	67	12/14	0	128	1649	1540	198	1163
LSD					NS	712	224	591