Table 5.

Average flows and balances of major nutrients (kg ha⁻¹) on farms of different resource endowments in Pallisa District, Uganda

Flows	Nitrogen				Phosphorus				Potassium
	LF	MF	SF1	SF2	LF	MF	SF1	SF2	LF	MF	SF1	SF2
Inflows
IN1	0	0	0	0	0	0	0	0	0	0	0	0
IN2a	0	1	1	4	0	0	0	1	0	0	0	3
IN2b	36	14	13	3	4	1	1	0.1	51	19	18	4
IN3	5	5	5	5	1	1	1	1	3	3	3	3
IN4	2	1	2	1	0	0	0	0	0	0	0	0
∑IN	43	21	21	13	5	2	2	2	54	22	21	10
Outflows
OUT1	0	−1	−1	−3	0	0	0	−1	0	0	−1	−3
OUT2a	0	0	0	−1	0	0	0	0	0	0	0	0
OUT2b	−15	−7	−8	−1	−2	−1	−1	−0.1	−21	−9	−11	−2
OUT3	−12	−9	−13	−15	0	0	0	0	−2	−2	−1	−1
OUT4	−3	−2	−3	−3	0	0	0	0	0	0	0	0
OUT5	−1	0	−1	−1	0	0	−1	−1	−2	−1	−2	−2
OUT6	−2	−3	−4	−5	−1	−1	−1	−1	−1	−1	−1	−2
∑OUT	−33	−22	−30	−29	−3	−2	−3	−3	−26	−13	−16	−10
Balance	10Ns	−1Ns	−9**	−16**	2Ns	0Ns	−1Ns	−1*	28Ns	9Ns	5Ns	0Ns

IN1 Mineral fertilisers, IN2a Organic manures, IN2b Grazing, IN3 Atmospheric deposition, IN4 Biological nitrogen fixation, OUT1 Crop products, OUT2a Crop residues, OUT2b Manure, OUT3 Leaching, OUT4 Gaseous losses, OUT5 Erosion, OUT6 Human excreta

Balance = ∑IN − ∑OUT

* P < 0.05, ** P < 0.01, Ns not significant