To test the fertilizing power of plants a typical soil of the poorest soil of the experimental area was used. The leaves were harvested, dried and buried in plot soils (6 m squares) at a rate of 6 kg / plot.
An experimental device consisting of 5 plots of 6 square meters each was used. The 5 plots are distributed as follows:
- Control (without amendment)
- T1: Green fertilizer of L. cericeus
- T2: Green fertilizer of C. odorata
- T3: Green Fertilizer of P. argentea
- T4: Green fertilizer of a mixture of the three plants
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