In the absence of nitrogen in the nitrogen-deficient watermelon, the plants grow thin, grow slowly, the branches are reduced, the stems are short, the leaves are small and thin, and the leaves are light green or yellow. Usually the symptoms develop from the base of the old leaves, and the early premature aging. Remedial measures: 10~15 kg of urea per mu (about 20 grams per plant in seedling stage, 9~15 kilograms per acre in the vine season; about 15 kilograms per acre in the melon period) or 400~500 kilograms in human excrement Shi. In the absence of phosphorus in phosphorus deficiency, the roots of plants are poorly developed, the plant type is short, the growth is slow, the leaves are small and small, the surface of the leaves is dark green and dull, the back is purple, and the flower bud differentiation is affected, resulting in late flowering and easy falling. Poor, easy to "melon", the sugar content of the pulp decreased, the seeds are not full. Remedial measures: First, 15 to 30 kg of calcium phosphate per acre for trenching and topdressing; second, spraying with 0.4% to 0.5% of superphosphate leaching solution. In the absence of potassium in potassium deficiency, the plants grow slowly, the stems are weak, the leaves are dark and dull, the leaves are curled to the back, and the leaves of the lower nodes are yellowed. Symptoms usually develop from the bottom up. In severe cases, the heart leaves become pale brown, and even the burnt shape, resulting in difficulty in fruit setting, small fruit shape, reduced sugar content, and decreased quality. Remedial measures: First, use 5 to 10 kg of potassium sulfate per mu (3 to 5 kg per mu in seedling stage, 8 to 10 kg per mu after stretching) or 30 to 60 kg in grass ash; secondly, 0.4 Foliar application of %~0.5% potassium sulfate solution. This article URL: watermelon deficiency symptoms and remedies Best Eyelash Curler,Eyelash Curler Price,Good Eyelash Curler,Cheap Eyelash Curler Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizonscares.com