王爷的通房丫鬟h,abo标记生殖腔失禁

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Water-soluble fertilizer "fake" a lot, have you stepped on the pit?

Water-soluble fertilizer "fake" a lot, have you stepped on the pit?

2019-01-31
Recently, the official website of the Bureau of Quality and Technical Supervision of various places successively announced the results of the 2018 quality supervision and random inspection of fertilizer products, and another batch of unqualified fertilizer products were successively exposed, including water-soluble fertilizers. It is not easy for farmers to plant land, and it is hard-earned money to buy fertilizer, so we must say no to fake and fake products! For example, on August 9th, the official website of the Bureau of Quality and Technical Supervision of Yunnan Province reported on the situation of random inspection of water-soluble fertilizer products in Yunnan Province in 2017. Among them, the detection rate of unqualified products is 65.0%! There are many reasons for failure, such as quality indicators, heavy metal indicators exceeding product standards, and so on.
Super cold air sweeps the country! These things can improve the frost resistance of crops!

Super cold air sweeps the country! These things can improve the frost resistance of crops!

2018-12-13
Affected by a new cold air tomorrow, the first snow after winter in the country has been under the influence in recent days. This "super-cold air" has been severely cooled and the first snow in many areas of the country.
Effects of element deficiency in soil on plant growth

Effects of element deficiency in soil on plant growth

2018-09-01
The required content of each essential element on the plant varies widely, and can generally be divided into a large number of nutrients and micronutrients according to the amount of content required by the plant. Macronutrients generally account for more than 0.1% of the plant's dry matter weight. There are 9 types of carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium and sulfur; the content of micronutrients is generally below 0.1%, and the lowest is 0.1 mg / kg (0.1 ppm), they are 7 kinds of iron, boron, manganese, copper, zinc, molybdenum and chlorine. The lack of soil nutrients, the lack of different elements will have different pathological symptoms on plant growth: 1, nitrogen: the concentration required by normal plants
Amino Acid Knowledge Literacy

Amino Acid Knowledge Literacy

2018-09-01
For a long time in the past, it was generally believed that organic nitrogen such as amino acids could not be directly absorbed by plants, and only after mineralization was converted into simple inorganic nitrogen. However, more and more experiments show that in most soil systems, the absorption of amino acids by plants as a nitrogen source accounts for a considerable proportion of the total nitrogen source utilization, especially in soil systems where nitrogen sources are relatively scarce. It plays a role that cannot be ignored. With the follow-up research, people have found that amino acids can not only be used as plant organic nitrogen sources, play a certain fertilizer effect, but also participate in protein
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