1. Mid-Season Prediction of Wheat-Grain Yield Potential Using Plant, Soil, and Sensor Measurements.
- Author
-
Girma, K., Martin, K.L., Anderson, R.H., Arnall, D.B., Brixey, K.D., Casillas, M.A., Chung, B., Dobey, B.C., Kamenidou, S.K., Kariuki, S.K., Katsalirou, E.E., Morris, J.C., Moss, J.Q., Rohla, C.T., Sudbury, B.J., Tubana, B.S., and Raun, W.R.
- Subjects
WHEAT ,CEREAL grasses ,GRAIN ,PLANT spacing ,AGRICULTURE ,PLANT canopies ,SOIL moisture ,BIOMINERALIZATION - Abstract
The components that define cereal-grain yield potential have not been well defined. The objective of this study was to collect many differing biological measurements from a long-term winter wheat ( Triticum aestivum L.) study in an attempt to better define yield potential. Four treatments were sampled that annually received 0, 45, 90, and 135 kg N ha -1 at fixed rates of phosphorus (P) (30 kg ha -1 ) and potassium (K) (37 kg ha -1 ). Mid-season measurements of leaf color, chlorophyll, normalized difference vegetative index (NDVI), plant height, canopy temperature, tiller density, plant density, soil moisture, soil NH 4 -N, NO 3 -N, organic carbon (C), total nitrogen (N), pH, and N mineralization potential were collected. In addition, soil texture and bulk density were determined to characterize each plot. Correlations and multiple linear-regression analyses were used to determine those variables that can predict final winter wheat grain yield. Both the correlation and regression analyses suggested mid-season NDVI, chlorophyll content, plant height, and total N uptake to be good predictors of final winter wheat grain yield. [ABSTRACT FROM AUTHOR]
- Published
- 2006
- Full Text
- View/download PDF