Research (2) Production (Economic theory) (2) Farmers (2) Corn (2) Agriculture (2) Agricultores (2) Producción (2) Investigación (2) Maíz (2) Agricultura (2) production (2) Technology (1) Surveys (1) Supply and demand (1) Sowing (1) Selling (1) Sampling (1) Rural families (1) Proportion (1) Phosphorus (1) Peasants (1) Nitrogen (1) Insecticides (1) Shingles (Disease) (1) Fertilizers (1) Diet (1) Consumption (Economics) (1) Chance (1) Attachment and garnishment (1) Animals (1)