(1) Nitrogen deficiency: First, the true leaves are yellow, yellowing from the bottom to the top of the new leaf. On the compound leaves, there are parallel continuous or discontinuous iron-colored patches along the leaf veins. The chlorosis spreads from the tips of the leaves to the base, and even the whole leaf assumes a pale yellow color. The veins of the leaves are also green. Small and thin leaves, easy to fall off, slender stems. (2) Phosphorus deficiency: less nodules, slender stems, dark green leaves on the lower part of the plant, thick leaves, uneven, long and narrow. When phosphorus deficiency is severe, the veins are brown and yellow and the whole leaf is yellow. (3) Potassium Deficiency: Leaves yellow, and symptoms develop from the lower leaves to the upper leaves. Leaf margins began to produce chlorotic spots, expanding into patches, plaques connected, spreading to the center of the leaves, and only the veins around the veins were green. Yellow leaves are difficult to recover, leaves are thin, and they are easy to fall off. Plants with severe potassium deficiency can only develop till the flood season. Short roots, few root nodules, and thin plants. (4) Boron deficiency: Leaves are dark green, thickened, shortened between nodes, and dwarfed to form clusters. Flower buds turn white or light brown and tissue necrosis. In severe cases, burning necrotic spots form along the veins. (5) Molybdenum deficiency: First of all, leaf veins appear lighter and yellow in the leaves, similar to the symptoms of nitrogen deficiency. The difference is that when the soybean is deficient in molybdenum, the leaves are apt to have grayish-brown spots, and are wilted due to tissue dehydration. shape. A Urine Test Strip or dipstick test is a basic diagnostic tool used to determine pathological changes in a patient's urine in standard urinalysis. A standard Urine Test strip may comprise up to 10 different chemical pads or reagents which react (change color) when immersed in, and then removed from, a urine sample. Urine Reagent Test Strips,Urinalysis Reagent Test Strip,Ketosis Lose Fat Diabetics,Clinical Urine Test Strips Changchun Medicon Technology Development Co., Ltd , https://www.jlmdk.com
Sulfur and molybdenum application methods: General vegetables and peanuts, rice and other crops are more sensitive to sulfur, timely application of sulfur fertilizer. Molybdenum fertilizer can be used for seed treatment, and can also be used as base fertilizer and extra-root fertilizer. The commonly used method for seed treatment is seed dressing. Each kilogram of seeds uses 2 g of ammonium molybdate and is formulated to have a concentration of 3%-5%. When soaking, soaking in 0.05%-0.2% ammonium molybdate solution for 8-12 hours. Seed dressing is better than soaking.