A Critical Review of Allometric Models for above Ground Grass Biomass Estimation

Abstract

In identifying viable, suitable, reliable, and sustainable site for establishing grazing reserve, there is the need to first obtain the Above Ground Grass Biomass (AGGB) of the proposed site. This paper reviews the existing literatures dealing with above ground biomass estimation of plants. The aim is to get a model that can be used in adopting a systematic and reliable method for measuring, reporting and verifying quality and quantity of grasses, foliage and other vegetation for the purpose of cattle rearing and other agricultural activities. Most of the allometric models reviewed have a common objective but they differ in terms of theoretical assumptions. Correlations between biomass and morphological characters were closely scrutinized, model suitability or unsuitability over a specific specie, site or season was analysed and evaluated. This study will therefore provide scholars with the choices of an allometry model for AGGB estimation, thereby contributing to the sustainable livestock grazing and agriculture both at the local and global levels.