Table 1. Summary of crop history and N addition as organic amendments or synthetic N fertilizer over the past 12 months.

	Urea fertilized	Organic fertilized	Unfertilized
Crop cycle stage	1st Ratoon crop	Plant crop	1st Ratoon crop
Crop age (weeks)	11	10	11
Organic N addition	~20 kg N ha−1 as sugarcane litter (11 weeks)	~80 kg N ha−1 as soybean litter (6 months) ~300 kg N ha−1 as mill mud (12 months)	~20 kg N ha−1 as sugarcane litter (11 weeks)
Synthetic N addition	135 kg N ha−1 urea (10 days)	None	None

The quantity of N applied is shown with time since application in parentheses.