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

Table 9

Comparison of new and general land suitability criteria with land quality and characteristics.

Land quality/land characteristics	New land suitability criterion of hybrid maize				Land suitability criterion of general maize [47]
	S1	S2	S3	N	S1	S2	S3	N
Rooting condition (rc)
Coarse material (%)	0–13.51	13.51–27.48	27.48–52.41	>52.41	<15	15–35	35–55	>55
Effective depth (cm)	≥69.66	49.36–69.65	33.29–49.35	<33.29	>60	60–40	40–25	<25
Nutrient retention (nr)
Organic carbon (%)	≥0.61	0.52–0.60	0.34–0.51	<0.34	>1.20	0.8–1.2	<0.8	—
Nutrient availability (na)
Total N (%)	≥0.11	0.08–0.10	0.06–0.07	<0.06	Mo	Lo	VLo	—
K exchangeable (cmol(+)/kg)	≥0.25	0.14–0.24	0.05–0.13	<0.05	Mo-Hi	Lo	VLo	—
Erosion hazard (eh)
Slopes (%)	0–7.70	7.71–11.84	11.85–18.25	>18.25	<8	8–15	15–25	>25
Soil erosion (ton/ha/year)	≤55.32	55.32–195.29	195.30–605.57	>605.57	—	VLi	Li-Mo	He-VHe
Land preparation (lp)
Rock outcrops (%)	0–4.46	4.47–13.10	13.11–31.89	>31.89	<5	5–15	15–40	>40
Surface rock (%)	0–4.46	4.47–13.10	13.11–31.89	>31.89	<5	5–15	15–40	>40

S1, very suitable; S2, moderately suitable; S3, marginally suitable; N, not suitable; Hi, high; M, moderate; Lo, low; VLo, very low; He, heavy; Li, light; VLi, very light; VHe, very heavy.