Influence of Cutting Date and Nitrogen Fertilizer Levels on Growth, Forage Yield, and Quality of Sudan Grass in a Semiarid Environment

Table 4

Crude protein content (%) and protein yield (kg/ha) of Sudan grass as affected by cutting date and nitrogen fertilizer levels during 2016 and 2017 summer seasons.

Treatments and interactions	Crude protein (%)		Protein yield (kg/ha)
	1^st cut	2^nd cut	1^st cut	2^nd cut
Season 2016
Cutting date (D)
Early	12.81	13.18	579.4	566.4 a
Late	12.77	13.24	643.9	534.6 b
F test	NS	NS	NS
Nitrogen fertilizer levels (N)
35 kg	12.26 b	12.72 b	352.6 c	490.9 b
70 kg	12.84 a	13.29 ab	588.3 b	554.4 a
105 kg	13.27 a	13.61 a	894.0 a	606.2 a
F test
Interactions D × N	NS	NS	NS
Season 2017
Cutting date (D)
Early	11.33	12.05	400.6	377.7
Late	11.54	12.14	380.6	367.7
F test	NS	NS	NS	NS
Nitrogen fertilizer levels (N)
35 kg	10.61 b	11.69 b	333.3 c	324.2 b
70 kg	11.56a	12.16 ab	403.8 b	398.5 a
105 kg	12.13a	12.44 a	434.8 a	395.5 a
F test
Interactions D × N	NS	NS	NS	NS

and indicate significance at 0.05 and 0.01 levels, respectively, and NS indicate insignificancy of differences.