Impact of Forage Fertilization with Urea and Composted Cattle Manure on Soil Fertility in Sandy Soils of South-Central Vietnam

Table 6

Brachiaria cv. Mulato II dry matter yield and N, P, and K balances by farm.

Farm	Yield	N balance	P balance	K balance
	(Mg DM/ha/yr)	(kg N/ha per yr)	(kg P/ha per yr)	(kg K/ha per yr)
3	26.2	−653 e	−113 d	−783 e
1	16.1	−342 d	−71 c	−610 d
2	14.8	−325 d	−57 c	−388 c
5	13.3	−150 c	−21 b	−186 b
6	8.8	−56 b	−9 ab	−107 ab
4	6.6	53 a	7 a	−38 a

Farm yields are overall experiment means (geometric means).
Farm N, P, and K balances were calculated using dry matter yield and plot nutrient concentrations for the September 2011 and December 2012 samples.
Means not connected by the same letter in each column are significantly different (P ≤ 0.05).