International: Food and Agriculture Organization (FAO) of the United Nations, Rome, Italy.
Location:
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 126 Document Number: C18370
Notes:
Burton Swanson Collection, 214 pages, Describes and summarizes FAO's experiences in developing and applying an extension method that is strategically planned, needs-based, participatory and problem-solving oriented. Encourages systematic, interactive and holistic processes for extension planning, field implementation and management. Case studies involve rodent control campaigns (Bangladesh, Malaysia and Thailand), integrated weed management (Malaysia) and maize production by small farmers (Zambia).
This editorial is maintained in the office of the Agricultural Communications Program, University of Illinois > "International" section > "Philippines CARD Group" file folder., Discusses why multi-media campaigns for corn, vegetables, and fish have not enjoyed success matching that of the widely-cited media campaign which the Philippine Ministry of
Agriculture staged for rice (Masagna 99). Calls for research.
12 pages, via Online journal, Corn (Zea mays) grown in the southern Piedmont requires 200 to 280 kg nitrogen (N) ha−1 annually and requires up to 0.87 cm of water per day, making groundwater systems susceptible to nitrate (NO3−) leaching. A perennial white clover (Trifolium repens L.) living mulch (LM) system may reduce NO3-N leaching by using legume N to replace mineral N, though little information is available on such a system in the southern Piedmont. Therefore, a HYDRUS-1D model was used to simulate water and NO3-N flux in three cover crop systems. Cereal rye (Secale cereal L.) (CR), crimson clover (Trifolium incarnatum L.) (CC), and a white clover LM were fertilized with 280, 168, and 56 kg N ha−1. The HYDRUS-1D model was calibrated and validated with observed water contents and NO3-N data that were collected over two years. Water and NO3-N flux models were created for each treatment and evaluated using coefficient of determination, percentage bias, and index of agreement, and showed good agreement to observed data. Nitrate leaching below 1 m in 2015/2016 was 23.5, 12.7, and 21.4 kg ha−1 for the CC, LM, and CR treatments, respectively, but was less than 1 kg ha−1 for all treatments in 2016/2017 due to prolonged drought. Differences in leached NO3-N among treatments were attributed to variation in mineral N application rate and NO3-N uptake by cover crops. Overall, results suggest that the use of a perennial LM system may reduce NO3-N leaching when compared to annual CC and CR cover crop systems.
