Abstract
AbstractThe objective of the present work was to perform an economic analysis of centre‐pivot irrigation implantation on a sandy soil area with different previous land uses. Thus, it was possible to analyse three initial soil conditions inside (irrigated) and outside (rainfed) the centre pivot. The opening area (P1) was characterized by soybean planting for the first time after degraded pasture, P2 consisted of the second year of harvesting soybean/maize second season, and P3 consisted of the third year of harvest. Two crops were evaluated: soybean and maize. The centre‐pivot irrigation system was not profitable at the earliest stage of soil recovery (P1) immediately after degraded pasture because soil fertility limited yields. There was a 23% and 33% increase in soybean yield for the areas with 2 years (P2) and 3 years (P3) of soil recovery, respectively, compared to the first year. However, second‐season maize had an increased yield of 19% for the third‐year area (P3) compared to the first year (P1). Profit increased from P3 to P1 by $1541 ha−1 for soybean, $2654 ha−1 for maize and $2097 ha−1 overall. Irrigation treatments increased profit by 45%.
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