and three weeks later). The amount of ROOTS® applied was adjusted to be

Ca. 2 gallons/acre. Fertilizer (10-6-8 liquid garden formulation, Triazone

Corporation, Gesmar; Louisiana) was adjusted to be equivalent to 88 pounds of

N/acre (2 lb/1000 sq.ft.) in the case of full fertilization.

Plants were harvested at 50 days after emergence; pod number, pod weight, 
chlorophyll content of the leaves (with the SPAD 502 chlorophyll meter) and 
shoot and. root weight were measured. Data were subjected to analysis of 
variance and, in the cases where the overall F tests of the ANOVA were 
significant, comparisons between means were made by the Fisherts Protected 
Least Signicant Difference test.

RESULTS

There was no significant reduction in greenbean yield when fertilization 
levels were reduced, neither in pod fresh weight nor pod number per plant, nor 
weight per indivual pod (Table 1).

Shoot fresh weight was not significantly different between the full 
fertilized control and the reduction treatments plus ROOTS®. However, root 
weight was significantly higher in the 50% fertilizer reduction plus ROOTS® 
treatment.

Chlorophyll ~oritent was reduced with fertilizer reduction but it was not. 
correlated with yield.

Table 1. Fertilizer reduction in Bean cv. Provider treated with ROOTS®

 

 

N=34, means followed by the same letter are not statistically different at 95% level. Figures within parentheses = standard error of the mean.