Recent Trend in Agricultural Science

Spatial Distribution of Major Soil Order in Davao del Norte , Philippines Under Agriculture and Forestry Land-use

2021-12-04T21:30:14+07:00

Soil survey and classification provides basic information that is helpful to local government units for agriculture and disaster management in formulating land-use plan. This study used the soil classification and land use data obtained from the National Mapping and Resource Information Authority (NAMRIA) to develop a GIS-generated map of the spatial distribution of major soil order in the province of Davao del Norte, Philippines. Using the World Base Refence (WBR) of FAO, there were seven soil orders found in Davao del Norte namely; Eutric Regosols, Gleyic Cambisols, Humic Acrisol, Humic Luvisols, Orthic Acrisol, Orthic Luvisol and Eutric Cambisol. Orthic Acrisol is the largest order found in Davao del Norte covering 102,364.2847 hectares or 30% of the province’s total land area. Also known as “Ultisol” in the USDA soil taxonomy, this type of soil is low in fertility due to high leaching and high erodibility. If utilized in agriculture, sufficient application of lime and fertilizer must be applied to supply the nutrients needed by the plants and to attain maximum yield. This is especially important for Davao del Norte with an economy that is primarily agricultural-based. It is however recommended that field investigation must be conducted to validate the existence of these seven soil orders in the province.

THE EFFECT OF SEVERAL MIX GROWTH MEDIUMS ENRICHED WITH BIOLOGICAL AGENTS ON BREADFRUIT SEEDLING GROWTH

2021-12-04T22:06:07+07:00

Quality of seedling play an important role in effort to develop breadfruit orchard. However, the availability of cultivation technology is limited as well as research on those areas are also finite. Hence, deep assessment of seedling growth in nursery on several mix growth mediums is inevitable need to provide the seedling technology. The objective of the research was to find out the best composition of breadfruit seedling growth medium. The research was conducted in August to December 2017 in Sumani Research Station of Indonesian Tropical Fruits Research Institute. Randomized Block Design was used which 11 treatments and 3 replications. Each unit of the treatment was constituting of 30 seedlings. The result showed that utilization of various seedling mediums were given significantly effect on percentage of life seedling, time of emerging shoot and length of shoot. Nevertheless, enriched biological agent mycorrhiza was not exhibited significantly impact yet on seedling growth till 4 months after planting. Bare soil was presented the best medium for seedling in percentage of life parameter which reached 40,74 % and emerging shoot times 11,89 day after planting.

Application of two Trichoderma harzianum isolates secondary metabolites alone or in combination on pepper seedling vegetative growth

2021-12-10T14:46:58+07:00

This study aimed to assess the effect of secondary metabolites derived from two Trichoderma harzianum isolates alone or in combination on the vegetative growth and on phenolic compounds content qualitatively of non climbing pepper seedling. Randomized block design was used with five treatments and six replicates. The treatments were control, secondary metabolites of T. harzianum T10 or T213, their combination, and benomyl. Variables observed were plant height, stem diameter, number of leaves, leaf length and area, number of branches, plants fresh and dry weight, roots fresh and dry weight, root length, and phenolic compounds qualitatively. Results of the research showed that the secondary metabolites of T. harzianum was able to increase vegetative growth, especially plant height, stem diameter, number of leaves, leaf area, plant fresh and dry weight, roots fresh and dry weight, and root length as 36.18; 8.33; 47.02; 15.57; 20.02; 16.67; 31.99; 33.33 and 18.26%, respectively (T10); 42.44; 10.20; 43.67; 18.08; 20.59; 9.09; 31.39; 30.76 and 18.26% respectively, (T213); 48.21; 13.72; 44.84; 18.49; 21.57; 16.67; 33.95; 33.33 and 17.07% respectively (combined T10 and T213). The secondary metabolites of T. harzianum could increase the content of phenolic compounds (saponins, tannins, and glycosides) qualitatively in non climbing pepper seedlings.

Evaluation of growth and flowering performances of chrysanthemum cultivars

2021-10-16T13:41:17+07:00

Chrysanthemum varietal evaluation based on morphological features on vegetative and reproductive characteristics was dedicated to provide relevant information for growers to plan the production process. For breeders, the information was needed as the basis on initial selection for further breeding activities. The research was conducted under plastic house conditions at the experimental field of the Indonesian Ornamental Crops Research Institute (IOCRI) from April to August 2018. Twenty commercial cultivars of spray-type chrysanthemum were evaluated under plastic house conditions. Twenty spray type chrysanthemum cultivars had been evaluated for the morphological features on vegetative and reproductive organs. The result showed that all tested cultivars showed different performances on plant height, ratio of leaf length : width, stem diameter and node length. On reproductive organ, variations among genotypes were detected on flower diameter, stalk length, outer floret color before flower opening, inner floret color after flower opening and shape of floret tip. In terms of inflorescence form and type of flower head, 80% of the tested cultivars had corymbiform with semi double flower

SHOOT INDUCTION OF STRAWBERRY cv. DORIT THROUGH TDZ PRE-TREATMENT AND STEM TRANSVERSE SECTION METHOD

2022-04-14T11:05:32+07:00

The demand of high-quality seedling on strawberry prodution in large quantity is a necessity to optimise maximal gain in the field production. In vitro meristem culture of Strawberry has successfully been established, however a reliable approach to speed up the shoot multiplication rate needs further investigation. The aim of present study was to investigate the effect of various concentrations and time exposures of pulsing TDZ solution towards stem nodus explant in combination with the transverse section technique on adventitious shoot multiplication of Strawberry cv. Dorit. The experiment was conducted at Indonesian Citrus and Subtropical Fruits Research Institute from June to August 2021. The result showed that pulsing the nodus explant without transverse section (TS) in 1 mg/l TDZ solution for 1 hour yielded higher number of adventitious shoots at 9.4 shoots per explant with the absent of visible callus formation compared to 5 hour exposure to TDZ. Transverse section (TS) is evidently increasing the adventitious shoot per cm explant length of with the total value of 14.8 shoots.

Key word : TDZ, Transverse section, Stem nodus, Meristem culture