Experimental Agriculture

Table of Contents - 1975 - Volume 11, Issue 02  

Research Article

Undersowing Rice (Oryza sativa) with Stylosanthes guyanensis. I. Plant Density

H. M. Sheltona1 and L. R. Humphreysa2

a1 Australian Development Assistance Agency, Khon Kaen University, Khon Kaen, Thailand

a2 Department of Agriculture, University of Queensland, St. Lucia, Australia

Abstract

Upland rice and Stylosanthes guyanensis were sown simultaneously in pure and mixed culture at varying densities at Na Pheng, central Laos. Vegetative growth of the rice was negatively related to stylo density over the range o to 81 stylo plants/m.2 Rice grain yield varied from 98·4 gm./m.2 in monoculture to 63·4 gm./m.2 when grown with 81 stylo plants/m.2 Rice was more competitive than stylo, but stylo growth was relatively independent of rice density over the range 20 to 120 rice plants/m.2

(Accepted June 29 1974)