Brazil is one of the leading countries in production and exportation of grains. However, most grain production regions in Brazil do not have an adequate storage capacity, which result in losses for the grain supply chain. A possible solution to increase storage capacity is the adoption of on-farm silos. We used the Reasoned Action Approach as a framework to identify the impact of attitude, perceived norms, and perceived behavioral control on farmers' intention to adopt on-farm silos and to identify the most important beliefs underlying their intentions to adopt it. A survey was conducted with 170 farmers in Brazil. Data was analyzed by means of Partial-Least-Square Structural Equation Modeling and MIMIC models. Results showed that attitude was the main determinant of intention, followed by perceived behavioral control and injunctive norms. Results also showed that "Sell grains at higher price", "Have independence in relation to grain storage firms", and "Have control over grain classification" are the most important beliefs that drive attitude; "Bank" is the most important belief that drive perceived norm; and "Have easy access to silos", "Prioritize other investments", and "Need skilled workers" are the most important beliefs that drive perceived behavioral control. These results revealed important implications to design public and private interventions aimed to stimulate the adoption of on-farm silos.

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Grain storage is strategic for agribusiness and therefore, it is important to consider the usefulness and benefits of its implementation. This study aims to identify the economic and financial viability of investing in grain storage structure at farm level using capital budgeting techniques. Considering the particularities of farms in the Midwest region of Brazil, the following investment valuation techniques were used: Net Present Value (NPV), Equivalent Uniform Annual Worth (EUAW), Internal Rate of Return (IRR), Modified Internal Rate of Return (MIRR), Discounted Payback (DP), Profitability Index (PI), Benefit/ Cost Ratio (B/C), Sensitivity Analysis and Monte Carlo simulation. The results of NPV and EUAW were positive. The results of IRR was 14.08% and MIRR was 11.39%, with a payback of 11.81 years, an PI of US$ 1.31 and a B/C ratio of 3.16. From the risk analysis, it can be inferred that the investment is low risk since there is a 99.97% probability of NPV being greater than zero. Therefore, grain storage is a potentially viable alternative for increasing the competitiveness and wealth of Brazilian farmers, even in the context of an emerging economy.