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Are rare earth elements in tea harmful? And where do they come from?
A few years ago, most of the 10,000 boxes of tea MOU of Taipei Agricultural Products Marketing Corporation could not be fulfilled. Was it pesticide residue exceeding the standard? Or rare earth element content exceeding the standard? Chen Chi-chung, head of the Council of Agriculture, believes that the failure of the Taipei Agricultural Products Marketing Corporation tea MOU is related to China's unique rare earth element testing standard, not a pesticide problem.
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What to Do When Crops Are Deficient in Chlorine? Symptom Identification and Correct Use of Chlorine-Containing Fertilizers
Chlorine is one of the essential elements for the growth and development of many crops. Many plants will grow poorly if they lack chlorine, so what should be done when crops are deficient in chlorine? What are the symptoms? How should chlorine-containing fertilizers be used? Let's take a look. 1. The effect of chlorine on crops
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What are the typical symptoms of nitrogen, phosphorus, and potassium deficiency in rapeseed?
Rapeseed is a very important oil crop and also has a certain ornamental value; a field of rapeseed flowers looks golden and is very beautiful and attractive. During rapeseed cultivation, if the corresponding elements are lacking, some symptoms will appear, leading to reduced yield
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Symptom Manifestations of Major Nutrient Element Deficiency and Excess in Cotton
I. Symptoms of Nitrogen Deficiency and Excess in Cotton. When cotton plants are deficient in nitrogen, the plants are short and lignified, the leaf color is yellow-green, the leaves become smaller, the petioles are shortened, there are few side branches, and the number of leaves is reduced. The lower leaves of the cotton plant are most obviously affected by nitrogen deficiency, the growing tip stops growing, and the number of flowers
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Several Trace Elements Affecting Reproductive Performance in Wild Boar Farming
1. Vitamin E Vitamin E, also known as tocopherol, is closely related to animal reproductive performance and has effects such as promoting gonad and ovary development, facilitating conception, and preventing miscarriage. VE deficiency will cause reproductive dysfunction, failure to come into estrus or delayed estrus, infertility, miscarriage, stillbirth
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Three Key Elements of Scientific Feed Feeding in Macrobrachium nipponense (Freshwater Shrimp) Aquaculture
In the process of Macrobrachium nipponense aquaculture, feed is the input with the largest application amount. Selecting good feed and achieving high utilization rates plays an important role in improving shrimp immunity, preventing shrimp diseases, and optimizing shrimp quality. The following three points should be noted when feeding:
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What are the effects of macronutrient water-soluble fertilizers?
Macronutrient water-soluble fertilizers have the effects of promoting growth and activation, promoting roots and strengthening seedlings, preserving fruit and promoting swelling, detoxifying and preventing senescence, biologically resisting continuous cropping obstacles, and resisting disease while preserving fertilizer. According to the fertilizer requirements and characteristics of different crops, the corresponding fertilizers have different formulas. Those sold on the market include special water-soluble fertilizers for various crops such as vegetables, fruit trees, flowers, grain, cotton, and oil crops.
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Detailed Explanation of the Standard for Water-Soluble Secondary Element Fertilizers
Secondary element content a, g/L 100; water-insoluble matter content, g/L 50; pH (1:250 dilution) 3.0-9.0; moisture content (H2O) % 3.0; secondary element content refers to calcium content or magnesium content or the sum of calcium and magnesium content, with a content of not less than 1.0%; both calcium and magnesium elements shall be counted as secondary
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Can eating spinach really supplement iron? How do you replenish the human body's trace elements such as iron, copper, zinc, chromium, molybdenum, selenium, iodine and cobalt?
In our daily life, have you also heard the saying that spinach is rich in iron and can make people strong and healthy? So does eating spinach really help supplement iron? Some experts point out that relying on spinach to meet the human body's need for iron is not reliable, because only
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Fast-acting chemical fertilizer means good fertilizer? A full breakdown of each element's role
Many farmer friends today judge the quality of a fertilizer by whether it acts quickly. This is a very serious misconception about fertilizing; in fact, it is quite the opposite, fast-acting does not necessarily mean good fertilizer. The speed at which a fertilizer acts is related to the content of each element, the application method, the fertilizer type
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