Establishing Land Suitability Criteria for Cashew (Anacardium occidentale L.) in Indonesia

Table 2

Land suitability criteria for cashew.

Land quality/land characteristics	Land suitability class
	Very suitable; (S1)	Moderately suitable; (S2)	Marginally suitable; (S3)	Unsuitable; (N)
Temperature
Elevation (m a.s.l.)	<196	196–324	324–456	>456
Water availability
Rainfall (mm)	987–2.247	827–987	601–827	<601
		2,247–3,197	3,197–4,926	>4,926
Dry month (number)	5–10	4-5	<4
		10-11	10-11	>11
Wet month (number)	1–3	<1
		3–5	5–8	>8
Rooting media
Texture	Clay loam, sandy clay loam, loam	Sandy clay, Sandy loam	Clay, silty clay, silty clay loam	heavy clay, silt, loamy sand, sand
Effective depth (cm)	>40	21–40	7–21	<7
Nutrient retention
CEC (cmol (+)·kg^−1)	>12.4	8.5–12.4	2.6–8.5	<2.6
pH	5.4–6.4	5.1–5.4	4.6–5.1	<4.6
		6.4–6.9	6.9–7.7	>7.7
Organic-C (%)	>0.8	0.5–0.8	0.1–0.5	<0.1
Base Saturation (%)	>66	<66
Available nutrient
Total-N	>0.07	0.05–0.07	0.03–0.05	<0.03
Available-P (ppm)	>40	11–40	1–11	<1
Exchangeable-K (cmol (+)·kg^−1)	>0.37	0.27–0.37	0.10–0.27	<0.10
Terrain condition
Slope (%)	<12	12–23	23–77	>77
Surface rock (%)	<15	15–29	29–76	>76