Diversity of nitrogen-fixing plants in agro-forestry system in Abra [Philippines]
2009
Edwin, A.B. Jr., Abra State Inst. of Sciences and Technology, Lagangilang, Abra (Philippines)
The study was conducted to generate information on the diversity of nitrogen-fixing plants in agroforestry farms in 12 municipalities of Abra from 14 January to 30 April 2009. Respondents of the study were the owners and farmers of the agroforestry farms. The study made used of the descriptive design in bench marking, characterization, documentation and evaluation of nitrogen-fixing plants. Descriptive statistics was employed. A structured interview schedule was used and supplemented by actual observation. Results showed that agroforestry farms in Abra contained diverse nitrogen-fixing plants. These plants included edible legumes, forage, medicinal plants and trees. These had definite characteristics, as well as ecological niche. The most common nitrogen-fixing plant found in the municipalities surveyed was kakawate or madre de cacao. Other plants grown were ipil-ipil and food legumes such as string beans, pigeon pea, mungbeans, lima bean, hyacinth bean, wing bean, peanut and winged beans. Baguio beans, mani-mani, acapulco, tayum-tayum and sampaga were rarely grown. Dolores, Luba and Tubo municipalities had the most number of nitrogen-fixing plants growing in agroforestry farms. Few nitrogen-fixing plants were seen in La Paz, San Isidro and Pennarrubia. Since these were lowland municipalities, fruit trees and field crops were usually grown in the agroforestry farms. Other crops cultivated included vegetables, plantation crops such as pineapple, fruit trees, grain crops, spices and forest trees.
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