Table 4.

Consumption and balance of nutrients on arable land leased in the WPN in the years 2011 and 2012

Specification	Use of natural fertilizers			Use of mineral fertilizers			Output of nutrients			Balance of nutrients
	N	P2O5	K2O	N	P2O5	K2O	N	P2O5	K2O	N	P2O5	K2O
(kg ha−1)
2011
Mean	3	1	4	86	30	55	58	27	44	46	0.9	3.2
Range	3–25	1–13	6–30	66–116	12–44	18–75	21–105	10–39	14–68	−8–77	−29–26	−45–45
2012
Mean	10	7	9	85	27	48	87	41	79	27	−9.2	−21
Range	0–35	0–32	0–35	59–129	12–42	18–70	32–121	24–54	47–106	−8–57	−34–33	−65–15