Integration of field pea (Pisum sativum L.) (FP) into dryland cropping systems has increased due to ecological and economic benefits, paired with a growing market for pea-derived products. Challenges exist in the High Plains that limit the integration of crop rotations to replace fallow periods with FP in wheat (Triticum aestivum L.)-based systems. This experiment compares chemical summer fallow to FP in a fallow–wheat rotation at two locations in western Nebraska. Soil water content, soil fertility, N mineralization, FP yield, and subsequent hard red winter wheat (HWW) yields were recorded. Subsequent HWW yields were not different between crop sequences (P =.42). The interaction of site-year with crop sequence explained the HWW yield differences (P =.0005), mostly due to precipitation variability among site-years. Most soil parameters tested only showed a main effect of date due to temporal changes in soil nutrient cycling. Replacing summer fallow with FP resulted in reduced soil water content, however, that did not result in long-term moisture deficiency due to crop sequence type. System annualized gross revenue was equal to or greater for 2 site-years for FP compared with fallow, with an average increase of US$113.15 ha–1. Pea–wheat reduced annualized net losses in 1 site-year by $70 ha–1 compared with fallow–wheat in the "average" pricing model. Among 3 site-years and three pricing models, pea–wheat resulted in greater net profit or reduced net losses compared with fallow–wheat in 5 site-year comparisons.
ASJC Scopus subject areas
- Agronomy and Crop Science