Improving Ammonium and Nitrate Release from Urea Using Clinoptilolite Zeolite and Compost Produced from Agricultural Wastes

Table 5

Significant levels from analysis of variance (ANOVA) to determine the effects of treatments and time on total N, soil exchangeable ammonium, and available nitrate.

Source of variation	Degree of freedom	Mean square
		Total N
Time	2	0.291	15728.8	2625.4
Replication	2	0.002^ns	132.9^ns	152.9^ns
Error a (time replication)	4	0.001^ns	126.7^ns	57.4^ns
Treatment	4	0.080	79170.1	33608.7
Time treatment	8	0.004	1543.4	282.5
Error b	24	0.001	112.7	73.1

Note. indicates significance at ≤ 0.05. ns indicates no significance.