Wind Direction Learn more about Wind Direction
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Effect of airflow on pigs
The motion of air molecules is called air flow, and the air flow that moves horizontally is called wind. The air flow in the atmosphere is caused by the uneven temperature distribution on the earth's surface, and the air molecules flow from the region of low temperature and high pressure to the region of high temperature and low pressure. In weather, the wind speed and direction are often described. The wind speed is the distance of the wind movement per unit time (m); the wind direction is the direction of the wind, expressed in 8 or 16 directions, and the wind direction frequency chart (wind direction rose chart) is drawn according to the probability of the wind appearing in each direction. Wind direction frequency diagram
2019-01-16 -
How to determine the row spacing of grape plants
The planting direction of grape generally chooses the north-south direction is better, can better accept the light, but also make the shelf surface basically vertical to the dominant wind direction of the growing season, which can reduce the wind damage. However, if it is limited by the land, it can also be planted in the east-west direction. Row spacing according to the choice of cultivation frame, the row spacing of the hedge is 2 to 2.8 meters, the shed.
2018-09-11 -
Site selection of pig ecological health farm
Site selection of pig ecological health farm
2018-06-30 -
Identification and control of kiwifruit branch blight
Kiwifruit branch blight, also known as dehydrated branch blight, is a physiological disease caused by climatic factors, which is caused by no man-made fertilizer or drug damage, as well as pathological root rot, branch rot, canker and so on. the phenomenon of sudden wilting and death of fruiting branches or vegetative branches. First, symptoms of the disease.
2018-09-16 -
Construction scheme of chicken house in chicken farm
Construction scheme of chicken house in chicken farm
2018-07-04 -
Timeliness characteristics of plant diseases and insect pests
Plants have their own characteristics when they have diseases and insect pests, and the timeliness of plant diseases is one of the major characteristics. An accurate understanding of these characteristics is very beneficial to the treatment of plant diseases. So what is the timeliness of plant diseases and insect pests
2018-07-02 -
The latest course on the Construction techniques and methods of vegetable greenhouse
At present, facility agriculture has large output and good benefits, which is a major direction for the development of modern agriculture. At the same time, it has high scientific and technological content, high technical requirements, and a lot of investment. In this way, for ordinary farmers who want to participate, it is very risky and difficult.
2020-11-10 The latest vegetables greenhouse construction technology methods tutorials at present -
Operation and maintenance of rice seedling bed in greenhouse
Rice seedling bed greenhouse is mainly composed of greenhouse framework, transparent cover (including plastic film, plastic plate, PC board, etc.), several single seedbeds and spraying system. The device has the characteristics of compact structure, high land utilization rate and convenient operation. 1. Before installation, the site must be leveled.
2018-09-11 -
Construction technology of vegetable greenhouse
Construction technology of vegetable greenhouse
2018-07-05 -
Site selection and architectural layout of cattle farm
Site selection and architectural layout of cattle farm
2018-07-06 -
Control of snow blight of spruce
Snow blight harms spruce needles, which are reddish brown. Snow blight occurs under snow. Ascospores invade spruce needles covered with snow. After maturing from September to October every year, it spreads with the help of wind and Rain Water. It was observed that in the young forest after artificial reforestation, because of the high planting density in the past, the situation of "hand in hand" was formed. once the disease spread particularly seriously, 1/2 of the needles of the plant were infected and lost green and turned reddish brown, resulting in the death of the whole plant. The unclosed regeneration land of Tex Forest Farm is nearly 2666 hectares, in order to ensure that
2019-01-16 -
Squall line weather system sweeps across the Pearl River Delta by strong winds and thunderstorms
Squall line weather system sweeps across the Pearl River Delta by strong winds and thunderstorms
2019-02-21 -
What is the seedling method of bayberry planting?
Red bayberry is a special fruit tree in China, the whole body is a treasure, its root, stem, branch, leaf, fruit, stone, all have high utilization value. So what is the seedling method of bayberry planting? 1. Seedling raising methods of Myrica rubra 1. Close sowing and raising seedlings (1) collecting seeds and collecting trees
2020-11-09 Bayberry planting raising seedlings method what is it bayberry poplar -
How to raise vines on the balcony of the family? how to water the vines in this season?
Rose is one of the common flowers and plants in our life, and even many people like to raise rose potted plants at home. There are many varieties of rose, each of which has its own characteristics. In fact, Fujimoto rose is the most common, because the flowering period of Fujimoto rose is very long.
2020-11-08 Family balcony how raise Fujimoto rose potted plant watering -
The layout of goose farm is exquisite.
1. Site selection. The site is close to the water source, the water surface is as wide as possible, the water depth is 1-2 meters, the water quality is good, far away from the residential area; the soil quality is preferably sandy loam, the transportation is convenient, the direction faces south. 2. The scale is determined. The production scale is determined by investment capacity, feeding conditions, technical strength, source of goose seedlings and product sales, etc. Only by forming mass production can there be greater feeding benefit. 3. Overall planning. First of all, the housing should be divided into production areas and administrative areas, living areas, more than 50 meters apart between the two areas, separated by walls. Production
2019-01-16 -
How to protect young pigs from cold in winter
The optimum temperature for piglets to grow was 3430 ℃ at the age of 3 days, 30 ℃ at the age of 7 days, and 25 ℃ at the age of 30 days. If the temperature is low in winter, the following measures should be taken to keep the piglets warm. 1. The fence house should do a good job of cold prevention and heat preservation before winter, repair the doors and windows in time, and fill the holes and seams of air leakage. In the open farmers' pig house, the wind curtain with woven cloth or feed woven bag should be used to cover the position of the wind direction, so as to reduce ventilation as far as possible and prevent the north wind and Rain Water from infiltrating directly from the outside, so as to increase the temperature of the pig house.
2019-01-15 -
Environmental protection facilities and construction requirements of soilless cultivation
Environmental protection facilities and construction requirements of soilless cultivation soilless cultivation is an efficient technique in protected cultivation. The reason why it is more high-yielding, high-quality and efficient than soil cultivation is not only because soilless cultivation facilities have regulated crops.
2018-05-31 -
47 meters long tubular jellyfish were photographed in the deep sea of Australia! How does it move in the water? What do you feed on?
Jellyfish is a very beautiful aquatic animal, but also an important plankton in the aquatic environment, there are many species. Recently, Australia photographed a 47-meter-long tubular jellyfish in the deep sea! So how does it move in the water? What do you feed on? I. the deep sea of Australia
2020-11-11 Australia deep sea beat to 47 meters long tubular jellyfish it is in -
Walnut orchard selection
The selection of walnut orchard is directly related to the success or failure of pollution-free production of walnut and its economic benefits. To achieve the goal of early fruit, high quality, high yield, high efficiency and no pollution as far as possible, we should choose the land with flat terrain, deep soil, fertile soil, leeward to the sun and convenient transportation.
2020-11-27 Walnut garden selection walnut direct -
Construction method of Dairy cattle Farm
Construction method of Dairy cattle Farm
2018-07-06