Why are some orchards seriously
kind of soil is not in the original soil, so it is more likely to be missing than the existing soil. Either acidic or strongly acidic soil. Magnesium in sandy soils is susceptible to rain. Lack of magnesium due to wetting of irrigation water;
3. Potassium fertilizer or phosphate fertilizer application too much, will also inhibit the absorption of magnesium, the expansion of the fruit stage everyone to apply puffed fruit fertilizer with more phosphorus and potassium, will inhibit the absorption of magnesium, the occurrence of magnesium deficiency symptoms. The best thing to do is to supplement together.
4. The amount of organic fertilizer used is small. The soil is compacted, there is a problem with absorption, anyway, it is necessary to plant citrus and dig a ditch once a year. Or you have long-term integration of water and fertilizer.
5. The sensitivity of different species and varieties magnesium nitrate hexahydrate of citrus magnesium varies, and the order of sensitivity strength is generally grapefruit> sweet orange> wide-skinned citrus.
6. Other factors: improper selection of rootstock. Nematodes are infested and stagnant water causes rotten roots. Factors such as rotten roots can also cause various deficiency symptoms in citrus due to difficult nutrient absorption.