Theses

The validity and reliability estimates of communication value orientation test

Sun, 01 Jan 1989 00:00:00 GMT

The validity and reliability estimates of communication value orientation test Sandig, Elias Valencia Jr. The study sought to establish a relatively reliable and valid communication value orientation (CVO) test and build a theory using CVO as the focal point. The study was conducted in two villages of Iloilo using a complete enumeration of rainfed lowland farmers. The data were obtained from 105 respondents using interview schedule and flip chart for the CVO test. The multi trait-multimethod matrix analysis, Spearman-Brown prophecy formula, t-test, phi coefficient and Cronbach’s alpha were applied in reliability and validity estimation. Percentages, means, ANOVA, simple linear regression and multiple linear regression were utilized for descriptive and relational studies. Findings showed that the original (13-3-4) form of CVO test had low validity estimates which improved when recombination 4-1-1 was used. Recombination 4-1-1 had relatively low reliability estimates. The Ilonggo farmers were relatively old and predominantly male and married. They had obtained 6.57 years of education and had 4.5 dependents. They owned 25.02 percent of the 1.0532 ha of rainfed farm they tilled. They had adopted the KABSAKA technology for 4.5 years. The Ilonggo farmers had propensity for people CVO. Their inclination for action, process and idea CVO were significantly location-specific. On the average, the Ilonggo farmers had a cropping intensity of 1.725 which yielded 5.8167 tons per ha. Consequently, they obtained ₱6425.56 net income per ha, ₱57.28 per manday labor productivity and 73.9 percent return on cash investment. The multiple linear regression revealed that all seven personal variables significantly predicted action CVO. All things being equal, age, education, farm size and land ownership determined action CVO; age caused process CVO; and land ownership affected people and idea CVO. Only idea CVO was associated with innovativeness as shown by simple linear regression. The multiple linear regression disclosed that all four CVOs significantly determined the cropping intensity, annual yield and return on cash investment of farmers. All things being equal, action and idea CVO caused cropping intensity while idea CVO predicted annual yield and return on cash investment. On the other hand, simple linear regression revealed that action, process and idea CVO caused cropping intensity; idea CVO determined annual yield; action CVO predicted labor productivity; and action, process and idea CVO correlated with return on cash investment. The patterns of relationship between CVO and its determinants and consequents were location-specific. Abstract only

Growth, yield and nutrient concentration of two rice varieties treated with four levels of salt and nitrogen

Sun, 01 Jan 1984 00:00:00 GMT

Growth, yield and nutrient concentration of two rice varieties treated with four levels of salt and nitrogen Patricio, Hope G. The effect of NaCl and nitrogen on the soil solution EC and pH; and on the growth, yield, and nutrient concentration of IR52 and IR26 rice varieties were studied in a pot experiment in the screenhouse of the Department of Soil Science, UPLB, College, Laguna, from December 17, 1982 to April 23, 1983. The results show that the soil solution EC increased, whereas pH decreased with increasing salinity. The different salt levels also significantly delayed flowering and harvesting, depressed growth and yields, and generally increased the concentrations of nitrogen, phosphorus, sodium and chlorine, but decreased potassium concentration in the straw of both varieties. Varietal response to applied nitrogen, however, differed. In terms of their straw yield, IR52 responded Here to the application of 90 kg N/ha whereas IR26, to 135 kg N/ha application. Furthermore, fertilization with 90 and 135 kg N/ha increased the concentrations of nitrogen in the root and of potassium and sodium in the straw of IR52. The same nitrogen levels increased the concentrations of phosphorus in the grain and of potassium in the straw of IR26, The highest nitrogen rate (135 kg N/ha) increased chlorine concentration in the grain of IR52, but decreased that of IR26. Abstract only

The influence of row spacing, nitrogen and potassium applications and harvest age on alcohol yield of Phil 6607

Sat, 01 Jan 1983 00:00:00 GMT

The influence of row spacing, nitrogen and potassium applications and harvest age on alcohol yield of Phil 6607 De los Santos, Doreta A. A field experiment was conducted at PHILSUCOM, La Granja, La Carlota City from December 1980 to December 1981 to determine the effects of row spacing, nitrogen and potassium applications and age of canes at harvest on alcohol yield of Phil 6607. Mature canes produced more alcohol per ton of cane due to high amounts of total sugars; however, yields per hectare were influenced by tonnage. Ten-month old canes yielded 3,076 and 2,102 liters more than the 8- and 12-month harvests. Average yields per hectare per month was 834, 975 and 637 liters for 8-, 10- and 12-month old canes. Alcohol yields were highest at closer row spacings and higher plant populations. General observations show that alcohol content of sugarcane planted in December and harvested 10 months later was highest at a spacing of 75 x 30 cm and fertilized with 100 kg N and 200 kg K₂O. Results also show that spacing had no significant effect on cane and sugar yields. The sugarcane variety responded to the application of 100 kg N/ha. Potassium increased PS/ha only because of its effect in increasing PS/TC with higher rates of K fertilizer applied. Abstract only

The nutrient composition, digestibility and nitrogen retention by sheep of four vacuum-ensiled grasses

Wed, 01 Jan 1969 00:00:00 GMT

The nutrient composition, digestibility and nitrogen retention by sheep of four vacuum-ensiled grasses Millamena, Andresito A. The chemical composition of forage or any other feedstuff is a very useful but insufficient information on which to judge its nutritive value for a particular class of livestock. To get a better index, it is necessary to determine the digestibility of the dry matter and the individual organic nutrients, i.e. , protein, fat and carbohydrates. Furthermore, to test the feed's usefulness as a source of protein, it is necessary to determine the availability to and retention by the animal body of its protein component. Thus, there is a need for a nitrogen balance determination in addition to the usual digestion trial. The data secured in digestion trials provide the general basis for our knowledge concerning the amounts of digestible nutrients furnished by different feeding stuffs. They are highly important to the science of livestock feeding (Morrison, 1956). The nutrient composition and digestibility of forages may be influenced by a number of factors, among which are as follows: a) species of forage, b) stage of maturity, c) nutrient status of the soil, d) climate or season, and e) processing and conservation methods. The actual feeding value is further affected by the species or class of livestock being fed. This study was conducted from August 1967 to February 1969 in the Department of Animal Husbandry and Dairy Training and Research Institute, College, Laguna, to determine: 1) the chemical composition of four vacuum-ensiled grass species harvested at 40 to 45 days of age and preserved for about 2 to 3 months; 2) the dry matter intake, digestibility and nitrogen retention by sheep of the four silages; and 3) the pH value, organic acids, total titratable acids and "total" anaerobic bacterial plate count of the four silages. These grasses were grown under the same conditions and harvested at the same age. Sheep were used as experimental animals representing the ruminant group for reasons of convenience and of the limitation of the amount of each grass silage available. The study was also an attempt to determine the workability of the vacuum-ensiling technique. Introduction