Vegetables are generally short-term nutritional crops, which can be re-broadcast. Due to the short growing season, the nutrients absorbed per unit time are much more than those with longer growing seasons and higher yields. Therefore, more quick-acting fertilizer should be applied during cultivation. Generally, roots that are deep and wide, have more roots, and root hair can absorb more nutrients, and the fertilization can be more extensive; while the roots are poorly developed, shallowly distributed, and poor in nutrient absorption, fine fertilization is required.
The root system of vegetable seedlings is still underdeveloped, and the amount of nutrients absorbed is not too much, but the fertilizer requirements are very high. Some thin quick-acting fertilizers should be applied appropriately. In the vegetable growth period and the fruiting period, a large amount of nutrients should be absorbed, and sufficient fertilizer must be supplied. Generally, measures such as staged topdressing, organic and inorganic fertilizer alternation, NPK fertilizer and micro-fertilizer balance, fertilization and irrigation are adopted to fully exert the fertilizer production increase effect.
According to the characteristics of fast growth of vegetables, weak roots and high yield, organic fertilizers should be combined with chemical fertilizers. Organic fertilizer not only provides a variety of nutrients for vegetables, but also helps to increase yield and improve quality with the decomposition of organic fertilizer.
Different vegetables need to adopt different fertilization techniques and methods.
1. Leafy vegetables: Leafy vegetables mainly include cabbage, green vegetables, spinach, and leeks. Leaf-plant topdressing is mainly based on nitrogen fertilizer, but at the same time of application of nitrogen fertilizer, phosphorus and potassium fertilizers need to be added. For example, when cultivated Chinese cabbage, two fertilizations before entering the rosette period and before the core are the key to high yield. If the supply of nitrogen fertilizer is insufficient during the whole growth period, the plants are short and the tissues are coarse and hard, and the leafy vegetables cultivated in spring are easy to be convulsed early; if the phosphorus and potassium fertilizers are insufficient in the late stage, the ball is often difficult to form.
2, fruit and vegetables: fruit and vegetables include melons, solanes and beans, and edible parts are reproductive organs. Generally, the seedlings need more nitrogen fertilizer, but excessive application of nitrogen fertilizer is easy to cause long, but prolong the flowering result, leading to falling flowers and fruit; into the reproductive growth period, the amount of phosphate fertilizer needs to increase sharply, and the amount of nitrogen fertilizer needed to be slightly reduced. Therefore, phosphorus should be added. Potassium fertilizer, control the amount of nitrogen fertilizer. After the cucumber is placed on the melon, it should be re-fertilized. Each batch of melon should be supplemented with a fertilizer.
3, root vegetables: root vegetables mainly include radishes, carrots, etc., edible parts are fleshy roots. In the early stage of root vegetables, more nitrogen fertilizer should be applied to promote the formation of hypertrophic green leaves; in the middle and late growth stages (the fleshy root growth period), more potassium fertilizer should be applied, the amount of nitrogen fertilizer should be properly controlled, and the assimilation of leaves should be promoted to the roots to form a strong fleshy root. . If there is too much nitrogen fertilizer and insufficient potassium fertilizer in the late growth stage of root vegetables, it is easy to make the aboveground part grow, the rhizome is small, the yield is decreased, and the quality is deteriorated.
It is advisable to apply organic fertilizer to the vegetables cultivated in the facility. Because greenhouses and other protected vegetables, the amount of fertilizer per unit area is much larger than that of exposed vegetables, and because there is no rainwater leaching, most of the remaining fertilizer remains in the soil, so that the nutrient concentration of the soil solution is too high, hindering the roots to absorb nutrients, so In the cultivation of vegetables in protected areas, full consideration should be given to the after-effects of the former glutinous fertilizers, the application of organic fertilizers, and the appropriate application of chemical fertilizers to avoid the damage of the sorghum vegetables due to the accumulation of salt.
Brazilian walnut, also known as Ipe, is a tropical hardwood grown primarily in Brazil but is also harvested in Bolivia, Venezuela, Guatemala, and Peru. Typically found in rainforests, the trees can grow to heights of 120 feet to 160 feet. The diameter of the tree ranges between three and six feet. Ipe is a popular choice for hardwood flooring because of its extreme durability and unique grain.
Botanical Name: Tabebuia serratifolia
Color: ranges in color from a light tan with greenish tinges to a brownish black.
Grain: The grain on the Brazilian walnut can be either fine and straight or very irregular.
Variations within Species and Grades: There is a large variation in color found in the Brazilian walnut,
Hardness/Janka: The Janka scale rating for Brazilian black walnut is 3,680.
Dimensional Stability: Brazilian black walnut has an average stability rating of 8.0.
Sawing/Machining: This lumber is very difficult to saw, especially if using hand tools.
Sanding: Sanding is very difficult and care must be given to minimize scratches and sanding marks.
Nailing: Because of the hardness of the lumber, Brazilian walnut can be very difficult to nail.
Finishing: Care should be given when finishing Brazilian walnut flooring.
Availability: Brazilian walnut is moderately available with some regional limitations
however most pieces used for flooring tend to be of the darker variety.
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