Dynamic Crop Water Production Model of Plantain Yield Response to Water
O. Akinro Akinola *
Department of Civil Engineering Technology, Rufus Giwa Polytechnic, PMB 1019, Owo, Ondo State, Nigeria.
A. A. Olufayo
Department of Agricultural Engineering, Federal University of Technology, Akure, Nigeria
P. G. Oguntunde
Department of Agricultural Engineering, Federal University of Technology, Akure, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
Crop Water Production Function Model (CWPFM) has been studied for quite few decades and since recent years developing a non- time specific and non-site-specific CWPFM has been receiving more and more attentions. A dynamic model of plantain bunch yield response to daily available soil moisture is presented. Using a priori information on dry matter accumulation in the plant when water is not limiting and using a piecewise linear regression, functions of crop response to soil moisture from experimental test plot data were estimated. With the estimated model, the bunch yields for various irrigation schedules were predicted. The predictions demonstrate the sensitivity of the model to the timing of irrigations.
Keywords: Dynamic model, static model, sigmoidal function, piecewise regression, dry matter accumulation