Determination of Land Suitability Criteria for Maize Hybrid in Boalemo Regency Based on Optimum Yield and Selected Land Quality

Table 8

Yield limits of hybrid maize and values obtained in each land suitability class interval by land quality and characteristics.

Land quality/land characteristics	Yield limits (ton/ha)			Value of land suitability criterion obtained
	S1 − S2 (80% × Yoptim)	S2 − S3 (60% × Yoptim)	S3 − N(40% × Yoptim)	S1	S2	S3	N
Rooting condition (rc)
Coarse material (%)	8.17	6.05	4.04	0–13.51	13.51–27.48	27.48–52.41	>52.41
Effective depth (cm)	8.46	6.37	4.29	≥69.66	49.36–69.65	33.29–49.35	<33.29
Nutrient retention (nr)
Organic carbon (%)	8.46	6.37	4.29	≥0.61	0.52–0.60	0.34–0.51	<0.34
Nutrient availability (na)
Total N (%)	8.54	6.43	4.33	≥0.11	0.08–0.10	0.06–0.07	<0.06
K exchangeable (cmol(+)/kg)	5.58	4.42	2.98	≥0.25	0.14–0.24	0.05–0.13	<0.05
Erosion hazard (eh)
Slopes (%)	8.54	6.43	4.33	0–7.70	7.71–11.84	11.85–18.25	>18.25
Soil erosion (ton/ha/year)	8.17	6.05	4.04	≤55.32	55.32–195.29	195.30–605.57	>605.57
Land preparation (lp)
Rock outcrops (%)	7.41	5.69	3.97	0–4.46	4.47–13.10	13.11–31.89	>31.89
Surface rock (%)	7.41	5.69	3.97	0–4.46	4.47–13.10	13.11–31.89	>31.89

S1, very suitable; S2, moderately suitable; S3, marginally suitable; N, not suitable.