Volume 13 Nos. 1 – 4 January – December 1991

Alan L. Presbitero and Vincent Christian Quimbo ABSTRACT The effect of percent slopes on the erosion coefficient of Umingan, Maasin and Malitbog clays was found to be highly significant. For all the soil types, erosion coefficient had a positive relationship with the slope. Third degree polynomial equations described the slope-erosion coefficient relationship for Umingan and …

The effect of slope on the erosion coefficient of Umingan, Maasin and Malitbog clays Read More »

Victor B. Asio ABSTRACT Degraded uplands are widespread in the country but only limited information is available about this type of ecosystem. In view of this, a study was conducted to evaluate the characteristics and ecological qualities of soils in a degraded upland area in Manjuyod, Negros Oriental. Results indicated that the soils have generally …

Characteristics and ecological qualities of soils in a degraded upland in Negros Oriental Read More »

Alan L. Presbitero ABSTRACT The monthly water release operating policy for a single multi-purpose reservoir system at each stage of development of the service area was defined using Discrete Differential Dynamic Programming (DDDP) optimization analytical technique and simulation model developed in a master program for a mainframe computer type. Irrigation and flood control were the …

The calculation of water release policy for Balog-balog (Philippines) single multipurpose reservoir system using DDDP analytical technique: 1. Model Development Read More »

F.A. Salares and R.M. Gapasin ABSTRACT A pot experiment was conducted to determine the most susceptible stage of growth of ampalaya, Momordica charantira L. to the root-knot nematode, Meloidogyne incognita infestation and the inoculum density of the nematode that could affect the yield. Gall and egg mass indices and nematode population recovered from the roots …

Influence of inoculum density of root-knot nematode (Meloidogyne incognita [Kofoid & White] Chitwood) and plant age on yield of ampalaya Read More »

Ramon R. Orias ABSTRACT Pressure drop (mm H20/m depth) was generally higher in high-moisture chips than in low-moisture chips. Relationships were found to be normally linear for sweetpotato (Ipomoea batatas) and taro (Colocasia esculenta) and logarithmically linear for cassava (Manihot esculenta). Porosity also increased with moisture, but despite the presence of more void fraction, pressure …

Static pressure drop in a fixed bed of root crop chips during drying as affected by airflow rate and moisture content Read More »

Linda S. de la Rosa and Linda B. Mabesa ABSTRACT Wild yams (Dioscorea hispida Dennst.), locally known as nami or kot, was detoxified and processed into flour. Detoxification was carried out by salting thinly-sliced tubers and subsequently washing these under running water. Results showed that detoxification can be achieved either by treating the thin slices …

Detoxification and utilization of wild yam (Dioscorea hispida Dennst.) flour as binder in meat loaf Read More »