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Reformulation of Crop and Management Factor in ANSWERS Model

Author(s): Yayat Hidayat | Naik Sinukaban | Hidayat Pawitan | Kukuh Murtilaksono

Journal: Jurnal Tanah Tropika
ISSN 0852-257X

Volume: 13;
Issue: 2;
Start page: 155;
Date: 2008;
Original page

Keywords: ANSWERS model | crop and management factor | soil erosion

Crop and management factor value is significantly corelated with outputs of ANSWERS model especially on soil erosion. Using daily crop and management factors (daily C factors), the ANSWERS model performs well in predicting soil erosion which is showed by determination coeffient (R2 = 0.89), model efficiency (0.86), and average of percentage model deviations (24.1%). Whereas using USLE C factor (2 cropping systems), predicted is much higher than measured soil erosion (over estimate). Output of the model is not statisfy; it is represented by model coefficient (0.40) and average of percentage model deviations (63.6%).
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