How long before the herbicide is poisonous?
Ordinary herbicides usually take six to seven days to volatilize in the field and fail in half a month. Some of the more toxic herbicides take several years to fail.
After spraying herbicides in farmland, the components of herbicides that are not absorbed by weeds will exist in the soil. Crops will absorb and accumulate herbicides, and their biological tissues will be destroyed to a certain extent, unable to synthesize some nutrients they should have, resulting in the loss of some nutrients in crop fruits.
Under the condition of normal dosage, herbicides have a certain inhibitory effect on wheat, corn, soybean, cotton and other crops. If the use is unreasonable, it will affect the normal development and maturity of crops and lead to recessive yield reduction. Studies in Hunan Province have shown that the side effects of herbicides can reduce the yield of rice, wheat, soybeans and corn by 10.5% to 26.8%.
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Planting conditions of avocado
Avocados should be grown in the tropics, with an average annual temperature of 20 to 26 degrees and sufficient precipitation to meet the growth needs. The root is shallow, the branch is fragile, can not bear the strong wind, the strong wind influence can lead to the reduction of yield, strong adaptability to the soil. Species
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Hemp cultivation in Heilongjiang
Hemp planting in Heilongjiang has a long history. Before the 1980s, it was planted about 800,000 mu every year. At present, Heilongjiang is the province with the largest hemp planting area in China, accounting for more than 60% of the national planting area. Related information of hemp: 1. Industrial hemp is also called hemp
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