Research Article
Determination of Land Suitability Criteria for Maize Hybrid in Boalemo Regency Based on Optimum Yield and Selected Land Quality
Table 1
Latent variables and indicators used in this study.
| | Latent variables | Indicators | Data sources | | Notation | Land quality | Notation | Land characteristics |
| | X1 | Temperature (t) | X1.1 | Temperature | [45] |
| | X2 | Water availability (wa) | X2.1 | Rainfall | [45] | | X2.2 | Wet month | Rainfall >200 mm | | X2.3 | Dry month | Rainfall <100 mm | | X2.4 | Long growth period (LGP) | Water balance (Thornwaite method), soil moisture storage (gravimetric method), water surplus, and deficit days | | X3 | Oxygen availability (oa) | X3.1 | Drainage | Soil survey and land observation |
| | X4 | Rooting condition (rc) | X4.1 | Texture | Pipet method | | X4.1.1 | Sand fraction | | X4.1.2 | Silt fraction | | X4.1.3 | Clay | | X4.2 | Coarse material | Soil survey and land observation | | X4.3 | Effective depth |
| | X5 | Nutrient retention (nr) | X5.1 | pH, H2O | pH meter (1 : 2.5) | | X5.2 | pH, KCl | | X5.3 | Organic C | Walkley and Black method | | X5.4 | Cation exchange capacity (CEC) | 1N NH4OAc, pH 7.0, extracted | | X5.5 | Base saturation | Calculation |
| | X6 | Nutrient availability (na) | X6.1 | Total N | Kjeldahl method | | X6.2 | availability | Olsen method | | X6.3 | K exchangeable | 1N NH4OAc, pH 7.0, extracted | | X7 | Sodicity (xn) | X7.1 | Exchangeable sodium percentage (ESP) | Calculation |
| | X8 | Erosion hazard (eh) | X8.1 | Slopes | Soil survey and land observation | | X8.2 | Soil erosion |
| | X9 | Flooding hazard (fh) | X9.1 | Inundation height | Soil survey and land observation | | X9.2 | Inundation period |
| | X10 | Land preparation (lp) | X10.1 | Rock outcrops | Soil survey and land observation | | X10.2 | Surface rock | | Y | Hybrid maize yield | Y.1 | Hybrid maize yield | Tile box methods |
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