Table 5.

Predicted mean values after deconstruction of fixed effect interactions of root angle (RA), crown root number (CRN), nodal root number (NRN) and seminal root number (SRN) for 20 wheat varieties at the Sonning site. Means were calculated separately for different year or tillage levels where significant interactions with variety were found. Tillage levels include conventional tillage (CT) and shallow non-inversion tillage (SNI)

Variety	RA in year 1 in SNI	RA in year 1 in CT	CRN in SNI across years	CRN in CT across years	NRN in year 1 across tillage	NRN in SNI in year 2	NRN in CT in year 2	SRN in year 2 across tillage
Alchemy	108.3	116.0	9.6	11.7	0.7	1.1	2.5	4.9
Bankuti 1201	122.1	117.6	9.7	10.4	0.1	0.5	2.6	4.5
Cappelle Desprez	92.3	103.0	9.1	11.4	1.4	4.3	3.9	6.0
Hereward	112.5	126.9	9.9	11.6	1.2	0.7	3.2	4.8
JB Diego	110.7	113.1	10.4	11.0	0.4	1.6	3.8	5.9
KWS Santiago	105.5	115.5	10.3	12.1	0.7	1.6	2.8	4.6
Maris Wigeon	119.0	113.7	10.1	10.1	1.0	4.6	3.7	5.1
Milns N 59	101.9	83.1	9.1	11.2	0.8	2.1	3.6	5.1
MV Kolo	100.5	121.3	10.2	11.0	1.6	0.6	2.8	4.7
Ostka Skomoroska	107.0	93.9	8.8	9.8	1.4	1.7	3.7	4.9
Red Lammas	93.1	107.7	8.4	11.7	1.9	2.3	6.0	5.0
Red Standard	87.9	94.1	11.2	12.4	1.7	3.5	4.8	5.4
Red Stettin 13	94.0	89.4	12.1	11.4	1.9	3.3	8.0	5.3
Robigus	99.3	125.8	10.8	10.4	0.7	2.1	3.4	5.1
Samanta 117	98.6	121.4	8.2	8.3	0.9	0.3	2.5	3.8
Soissons	98.1	113.4	8.4	13.1	0.5	1.2	2.7	5.2
Steadfast	112.7	108.1	10.8	11.7	2.0	3.6	2.0	5.5
Tiepolo	118.2	111.3	11.2	12.0	1.1	2.0	2.2	4.3
WW 502	117.2	95.2	8.8	8.7	0.9	1.0	2.0	5.3
WW 512	104.8	89.7	14.2	10.4	1.0	2.6	3.6	4.4
Mean	105.2	108.0	10.0	11.0	1.1	2.0	3.5	5.0
Standard errors of differences between means
Average	10.24	9.65	1.09	1.09	1.36	1.38	1.26	0.53
Maximum	10.56	10.94	1.10	1.10	2.73	2.04	1.33	0.57
Minimum	10.20	9.42	1.07	1.08	1.22	1.22	1.19	0.53