Prediction of Canola Residue Characteristics Using Near-Infrared Spectroscopy

Table 6

Pearson correlation coefficients for spring and winter canola residue traits measured using laboratory reference methods and compared to NIRS predicted values over two years and three locations for each crop type. For each pair, the level of significance was <0.0001 at .

		NDF	ADF	ADL	N	C	C/N
Year
2011	158	0.9255	0.936	0.9148	0.9798	0.9607	0.9366
2012	153	0.9302	0.9298	0.8278	0.9647	0.9473	0.9506
Crop type
Spring	161	0.753	0.7825	0.8507	0.8964	0.9319	0.8201
Winter	150	0.8261	0.8539	0.7886	0.9514	0.911	0.8959
Location
Colfax, spring	55	0.8051	0.7311	0.8354	0.9052	0.9566	0.6923
Davenport, spring	51	0.804	0.8421	0.817	0.9088	0.902	0.8976
Moscow, spring	55	0.6666	0.7285	0.8925	0.7321	0.929	0.7346
Odessa, winter	58	0.8139	0.8502	0.8002	0.9225	0.6885	0.8059
Genesee, winter	42	0.6347	0.7001	0.5523	0.9744	0.8863	0.879
Moscow, winter	50	0.8614	0.8583	0.8398	0.9353	0.9429	0.8685

NIRS: near-infrared spectroscopy; NDF: neutral detergent fiber; ADF: acid detergent fiber; ADL: acid detergent fiber; N: nitrogen; C: carbon; C/N: carbon to nitrogen ratio.