Nitrogen Fixing Tree Research Reports 8 : 27-28 . Jama , B.A. , Getahun , A. and Ngugi , D.N. 1991. Shading effects of alley cropped Leucaena leucocephala on weed biomass and maize yield at Mtwapa , Coast Province , Kenya .

Alder in pastures in the dairy region of Costa Rica Between 1400 and 2500 m elevation Alnus acuminata , a local alder ... Elevation above sea level Pasture associated with alder Age in years Spacing of trees in m Density per ha initial ...

In the methodology for the research ( § 1.4 ) , it was mentioned that the farmers have been selected on basis of a hypothesis about the use of dispersed trees in the pasture . It was also mentioned , that it appeared to be impossible to ...

One visit was to a coffee plantation using Erythrina and Cordia as shade trees and the other visit was to a pasture using Psidium guajava . Within the CATIE grounds an additional four plots were visited to see studies of a ) the effects ...

... extending selflife 1286 EGG PLANT / Research 0349 , 0448 EGGPLANT / Spacing , effect yield 0364 EGGPLANT / Weed ... 0369 ELEPHANT GRASS / Cutting heights , effects 0465 ELEPHANT GRASS / Fertility 0465 ELEPHANT GRASS / Fertilizers ...

Farmers generally grow crops between the lines of trees if tree spacing and canopy and nutrient cycling ... Study site The plantation used in this study was established in June 1991 on a cattle pasture which had been abandoned in 1981.

This study focused on the effect of three competitive grasses , Panicum maximum ( guinea grass ) , Brachiaria ... complete block design with four repetitions : lines of four E. deglupta trees were planted with a 3 m within - row spacing ...

Mixed tree plantations Experiments with native trees in Costa Rica and Argentina Montagnini , F. 1992. ... The Tropical Resources Institute of Yale School of Forestry and Environmental Studies maintains collaborative agreements with a ...

No doubt trees have a competitive advantage in the form of their greater stature , but particularly in agroforestry systems , they may be competitive with ... Because this research is focused on grass production this method is used .

It appears that the relatively high density of 167 trees / ha at this age does not have a negative effect on increment . ... and spacing of the trees . would therefore be a good idea to study the development of Cordia alliodora trees ...