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Summary and Conclusion of Session on Maize Agronomy ResearchChairperson: Jorge BolanosRapporteur: D. P. Baldos8 papers were presented in the Agronomy Session• One was a general critique of sustainability/agronomy issues relevant in maize production.• One was a general review of issues relevant to "winter" maize production in rotation withrice.• One was a review of research in sloping lands networking in SE Asia by IBSRAM• The rest presented general descriptive agronomic issues facing maize production in the SEAsian countries.In general, the value of hybrids was strongly recognized by speakers, in particular, earlymaturingand stress tolerant materials adapted to rotation systems with rice. General recommendationsfor nutrient inputs were high, over 100 kg Nlha and over 100 kg Plha as TSP. The need for K +fertilization was recognized given the intensive land-use patterns which typify the region.Specific issues:I. The paper on "alley cropping" pointed out the trade-off concerns between costs of establishmentof hedgerow crops and the long-run returns to farmers. Obviously, hedgerow crops do reducerates of soil erosion and runoff, but benefits to maize productivity only accrue in the long-run assoil fertility increases because of fodder green manure additions from the hedgecrop cuttings.2. Kraol