Paclobutrazol (PBZ) is a growth regulator used to control vegetative growth, stimulating the reproductive capacity of plants. PBZ has been widely marketed throughout the tropics to stimulate mango flowering. In the recent years, many reports showed that application of PBZ by soil drenching can cause permanent stunting of flushes, the vegetative and root growth of mango was reduced. The aim of this work was to determine the effects of PBZ on flowering of mango by foliar application. The commercial mango cultivar 'Namdokmai-sitong' was used in this study. The experiment was analyzed as a completely randomized design. There were 4 replications with 10 treatments. Foliar application at 15 days after pruning with PBZ at 0, 500, 1,000, 1,500 and 2,000 mg./L and repeated at 30 days with 0 and 1,000 mg./L. There was significant difference on the time to flowering, percentage of flowering shoots and panicle length. The trees receiving the PBZ at 2,000 mg/L were exhibited stunting of flushes and panicle malformation. This study suggests that the multiple foliar application of PBZ was effective in promoting flowering in 'Namdokmaisitong' mango, can help early flowering and higher percentage of flowering shoots.

The production of 25-7-7 analysis grade of suspension fertilizer processed by Luxen's Method was investigated for some physical properties changes during various storage periods. The solid instead of liquid raw materials were used in the production. The experiment was designed in CRD consisting of six storage treatments; 0, 7, 15, 30, 90 and 180 days with 4 replicates. The total urea was provided for Urea 1 being fed in clear liquid mixed solution stage and Urea 2 being fed in suspended solution stage. The process was to add Urea 1, xanthan gum, KCl, MKP, and Urea 2, respectively, into the cylindrical glass bottle which was mounted to the adjustable speeds of mixer and presented water. The resulting 25-7-7 analysis grade of suspension fertilizers were stored undisturbed at normal room temperature for various storage periods and its physical properties were analyzed periodically. The analysis of variance was performed using R statistical program. The result showed that pH of the suspension fertilizer ranged between 5.5-5.6 and specific gravity ranged 1.249-1.274 during all storage periods and there was nosignificant difference. The fertilizer viscosity increased as the storage times increased. The stability and the pour-ability were significantly decreased as the storage times increased. However, after six months, both stability and pour-ability were found to be above acceptable level. The changes in salting-out were found to be no significant difference among various storage periods. The result showed that the suspension fertilizers which were produced by Luxen's method could maintain their appropriate physical properties during six months of storage times.

Leaf anatomy of young rambutan (Nephelium lappaceum Linn.), durian (Durio zibethinus Murray), mangosteen (Garcinia mangostana Linn.), and longkong (Aglaia dookoo Griff.) potted plants grown under different light intensity (100%, 55%, 40%, or 25% of full sun) were observed. The thickness of both palisade and spongy parenchyma decreased as the light intensity decreased. This resulted in a decrease of lamina thickness when the light was lower. An exception occurred in mangosteen when the thickness of both palisade and spongy parenchyma in leaf grown under full sunlight were lower than in leaves grown under 55% or 40% full sun. The thickness ratio of palisade and spongy tissue in rambutan and durian decreased as light intensity decreased. While the ratios in mangosteen and longkong leaves grown under full sunlight were lower than the ratios of leaves grown under 55% or 40% of full sun. The frequency of stomata also decreased as the light intensity decreased. The thickness of palisade tissue of leaves grown under 55% of full sun in rambutan, durian, mangosteen, and longkong were 70, 110, 110, and 55 μm, respectively. The thickness of spongy tissue of leaves grown under 55% of full sun in rambutan, durian, mangosteen, and longkong were 60, 30, 410, and 145 μm, respectively. The thickness of leaves grown under 55% of full sun in rambutan, durian, mangosteen, and longkong were 186, 230, 565, and 233 μm, respectively. The number of stomata per square millimeter of leaves grown under 55% of full sun in rambutan, durian, mangosteen, and longkong were 437, 221, 133, and 301, respectively. Photosynthesis efficiency and light adaptation were discussed.