Abstract
The Buayan-Malungon River Basin (BMRB) is currently experiencing intolerable soil loss due to improper agricultural practices, and unsustainable land uses. This problem disrupts important ecosystem services such as provisioning, regulating, cultural, and supporting. This article provides an estimate of the agricultural crop productivity losses due to soil loss. The study estimates productivity losses through regression analysis by using nitrogen (N) fertilizer as a proxy for soil quality. The result revealed that N-fertilizer had a significant effect on corn yield. The predicted soil loss in BMRB in 2020 reached 41,308 tons/ha. Hence, the total soil loss cost in the river basin reached PhP 218,023,624 in 2020. This cost can be minimized if farmers practice a contour farming system as it helps to improve soil quality and control soil loss, which leads to sustainable farming and environmental sustainability.
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