Faustino P. Villamayor ABSTRACT Phosphorus (P) is generally considered to be the most limiting mineral nutrient in tropical soils. This study was conducted to determine the amounts of Pin various components of the rainforest ecosystem. Composite samples of rocks, soil, stream sediments, stream water, rainwater, leaves of dominant vegetation, forest litter, wood and moss were …
Faustino P. Villamayor ABSTRACT Residual soils, whose geology is marine and terrestial sediments, have higher available zinc content than those whose geology is marine elastics. These residual soils come from the upper catchment areas of alluvial soil. Available zinc contents of four alluvial soil series, namely Palo, Umingan, San Manuel and Mattdaue, were observed to …
Zinc Content of Alluvials As Affected by Residual Soil from the Upper Catchment Area Read More »
Juanita B. Moulin and Rodolfo G. Escalada ABSTRACT Sixteen varieties of mungbean grown in ViSCA during the wet season were evaluated for their growth and yield performance In the open field. Their agronomic parameters measured such as seedling emergence, flowering, maturity, plant height, and number of nodules developed per plant differed significantly among varieties. Most …
Performance of Different Mungbean Varieties Grown in the Open Field Read More »
N. 0. Aparra and N. G. Mamicpic ABSTRACT BNAS 51, Centennial and Kinangkong yielded 27.42, 14.32 and 5.41 t/ha of tubers, respectively, with a corresponding coefficient of variation (C.V.) of tuber yield among hills of 41.92, 46.02 and 107.65%. Yield among hills was slightly more uniform at a spacing of 60 x 75 cm (C.V. …
Jose R. Pardales, Jr. ABSTRACT The factors which limited fruit and seed development in taro were determined through laboratory and field observations in the flowers of 18 selected cultivars from the taro germplasm in the Philippine Root Crop Research and Training Center in ViSCA, Baybay, Leyte. The limited fruit and seed set in some taro …
Alfredo B. Escasinas and Rodolfo G. Escalade ABSTRACT Differences in grain yield between the different methods of weed control were not statistically significant; however, highly significant differences were observed on the timing of weed control. Results showed that early application of weed control treatments resulted in increased grain and stover yields. Clean culture and application …
Ofelia I. Dedal, M.K. Palomarand C.M. Napiere ABSTRACT Xanthomonas manihotis Starr infected four species of euphorbiaceous plants, namely: Manihot glaziovii Muell.- Arg., Manihot esculenta Crantz (variegated ornamental cassava), Euphorbia puicherrima Willd., and Pedilanthus tithymaloides (L.) Poit. The diagnostic character of the disease on the alternate hosts was similar to that on cassava which served as …
Nelson M. Esguerra and Frank H. Haramoto ABSTRACT Distribution pattern and population fluctuation of the carmine spider mite and its predators were studied in unsprayed Solo papaya trees grown at the Kauai Branch Experiment Station of the University of Hawaii, at Kapaa from 1978 to 1979. In the field, the carmine spider mites were found …
Distribution and Population of Papaya Carmine Spider Mites and Their Predators Read More »