In the process of growth and development of wheat, not only nitrogen, phosphorus, potassium and other elements are needed, but also trace elements play an important role in the growth and development of wheat. In the absence of trace elements, wheat will show some symptoms of deficiency: Deficiency of zinc: wheat lacks zinc during its growth period, the leaf margin of the wheat leaf is shrunken or distorted, and the veins from green yellow to white on both sides of the veins are striped stripes with yellow, white, and green triads, and the earing is delayed and the panicles are small. Iron deficiency: iron deficiency during wheat growth. At the beginning, young leaf veins lose green and yellow, and veins remain green. Afterwards, they are completely chlorotic. Sometimes the entire leaf is yellowish-white. Copper deficiency: The wheat lacks copper during its growth period. The tip of the wheat leaves turns white with yellowish gray edges and sharp yellow leaves. When it is severe, it cannot head at the heading stage. Manganese deficiency: When wheat is deficient in manganese, the leaves are soft and sagging, and the veins change from green to yellow. Molybdenum deficiency: When wheat is deficient in molybdenum, the leaf color becomes lighter, and small yellow-white spots appear along the veins of the leaves, and gradually become linear or flaky. Finally, the front of the leaves is dried up. Boron deficiency: When the boron deficiency occurs in wheat, the growth period is delayed, and the tip of the leaf is purple-brown. At the same time, its flower is not loose powder, pollen is less or deformed, sometimes no pollen, lateral enlargement of ovary, glume is not closed early, withered later. Square Steel,Square Bar,Steel Square Bar,Stainless Steel Square Bar Huaibei Zhonglian Steel Technology Co., Ltd. , https://www.zlxgsteel.com