Aeschynomene as green manure for rice

The widely accepted application of the fertilizers via the irrigation stream (fertigation) has necessitated the development of suitable techniques to help research in estimating the fertilizer requirements of crops. This paper describes a simple, inexpensive, and precise system tested for three years in field experiments, in which various levels of a fertilizer could be supplied simultaneously. The same system could also be used when irrigating simultaneously various crops with different fertilizer requirements from a single concentrated fertilizer solution, using only one fertigator.