Development of suitable greenhouse to increase melon production efficiency

2024-07-29T20:19:24+07:00

This research aims to develop a greenhouse, which suitable for increasing melon production efficiency by developing ventilation of the new greenhouse to be better than the primitive greenhouse; semi-circular greenhouse (farmer’s greenhouse). The new greenhouse has overlap curve roof with overhead opening is designed for cooling down temperature in the greenhouse. Temperature and relative humidity in the greenhouse are controlled close to the outside by a control system and the automatic fan activated when the temperature reaches 40 °C. The greenhouse is, 30.0 m. long ,6 m. wide, 3.0 m. high of pole and 1.5 m high of roof. The structure is galvanized steel pipe. The roof is covered with plastic 150 microns thick, the 32-mesh net used for the side walls. The construction costs less than 100,000 THB per unit, exclude fertilizer, irrigation systems, automatic temperature and humidity control systems along with ventilation fan set. The temperature measurement in the new greenhouses shown that the temperature decreases 5 - 15 °C when the inside air is ventilated by fan system, moreover in a sunny day that temperature reaches 40 °C, the automatic fan system reduces temperature to 37 °C. The melon variety used in this experiment is the Morakot variety, which is a popular melon variety consumed in Thailand. In terms of productivity, it was found that the greenhouse had an average total yield of 512 kg, an average income of 26,327 THB and a net profit of 6,633.21 THB per production cycle. Meanwhile, the farmer's greenhouse has an average total yield of 476 kg, an average income of 24,720 THB and a net profit of 2,692.88 THB per production cycle. The sweetness of the melon form both types of greenhouses pass the standard. The greenhouse has an economic break-even point of 3.36 years with the lifetime of 10 years, while the farmer’s greenhouse has the break-even point of 3.21 years with the lifetime of 5 years.

Efficiency of Weed with Weeder Machine in Paddy Field 3 rows

2024-08-19T21:39:54+07:00

The objective of this research is to develop a machine to eliminate weeds in rice fields. and test the performance of a 3-row, 2-wheel-drive weed-killing machine in rice fields with a HINOTA EA65A engine of 5.6 hp as the engine. Tested at speeds of 1.7 and 2.3 km/h. Use an average working speed of 2.1 km/h. It has a theoretical capacity of 1.31 rai/h. Actual working ability 0.91 rai/h. Work efficiency was 69.85%, efficiency in eliminating weeds the dry weight of weeds before extermination was 0.18 kg, the dry weight of weeds after extermination was 0.05 kg, the efficiency in eliminating weeds was 69%, and the fuel consumption was 3.86 l/rai. A comparative study of prototype weed exterminators in rice fields. With the developed weed-killing machine in black rice fields, it was found that the prototype weed-killing machine in black rice fields has an average weed-killing efficiency of 66%. It can be seen that the developed weed-killing machine for rice fields has a speed of work, theoretical ability, and actual ability to work higher than the prototype black rice weed exterminator, and the efficiency of eliminating weeds is higher as well.

Agricultural and Biological Engineering

Development of suitable greenhouse to increase melon production efficiency

Efficiency of Weed with Weeder Machine in Paddy Field 3 rows