The effect of chicken dung on the yield of ubi / Arcadio V. Perlado.

Includes bibliographical references.

This study "The Effect of the Chicken Dung on the Yield of Ubi '' was conducted at the experimental field of the Don Severino Agricultural College, 'Mang, Cavite, frog May to December, 1976. The purpose of the study was to know the best rate of chicken manure application and to deter-mine the effects on the growth and yield of ubi. The field previously planted to tomato was prepared by plowing two times followed by harrowing at two weeks in-terval. The entire field, 547.55 square meters, was divided into four equal blocks. Each block was subdivided into seven plots measuring 3 x 5.46 square meters each. There were four replications, six treatments, and a control. The different treatments were distributed at random on the plots as illustrated in the field layout. (See Figure 1). Seed pieces water prepared by cutting the tubers into portion containing at least two to three eyes. Each seed piece weighed 75 to 150 grams. To allow the ubi tubers to germinate, they were kept in a shady place two weeks before they were planted. Planting was done on May 12, 1976. Holes were dug about Sic) feet wide and one foot deep. The holed were filled with top soils and mixed thoroughly with chicken manure. Application of the fertilizer (Chicken Manure) was done twice. One half of the fertilizer requirement was applied one day before the planting time. The other half of the fertilizer requirement was applied three months after planting. Staking was done before the vines started to climb. The stakes were made out of small bamboo slices and wooden poles from two to three meters long. Wedding was done as the weeds appeared. The weeds were controlled intensively by hand pulling and with the use of a trowel. The most common pests found in the experiment were the worms caused by Spodoptera litura (pabr.) and white grubs caused by Apogonia by Block spot of ubi causedACercospora personate (Berk Curt) was the only disease observed in the experiment. Harvesting was done by digging the soil around the base of the plant at about one to two feet away and slowly uprooting the plants by hand. The crops matured 206 days from date of planting, as manifested by total defoliation drying of the entire stems. The plants with 25 tons per hectare of chicken manure exhibited the most vigorous stand of crop among all treated meats in the tile experiment while the control plots produced the poorest that showed yellowish leaves and stunted growth of plants.

Treatment 5 (25 tons per hectare) gave the highest weight of 2.11 kilograms of ubi tubers per plant or a difference of 1.84 kilograms over the control.
The lowest mean weight of tubers produced per plant was obtained from the control with only 0.27 kilograms. The highest total number of tubers per plot was in treatment 5 (25 tons per hectare, a total of 73 pieces while the lowest was in the untreated (control) with 49 pieces.

Submitted to the University Library 05/04/2007 SP-110