The standard for suitable harvesting of amaranth is: plant height is about 35 cm, the average leaf size is about 5, and the growth period is more than 25 days. The specific harvesting standard can be controlled according to plant growth, nutrient accumulation and market demand. Head leeks are generally harvested at a seedling height of 20 cm. In order to facilitate the growth of the amaranth, when the amaranth is cut, the soil grower is left at 7 cm, and the non-cultivator is left at 5 cm. After each time, leave about 3-5 cm. The greenhouse leeks are generally harvested 3 times in the shed, and after harvesting the shed, two more green scorpions can be harvested.
Multi-layer covered greenhouses or greenhouses with good insulation performance can produce 2500-3500 kilograms per acre. If the roots are well cultured, the storage nutrients are more, and the management is fine, the yield per mu can reach 5000-5500 kg.
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PCR ( Polymerase Chain Reaction)
It provides a way to make more copies of a portion of DNA.
We need to have PCR ingredients that include DNA portion, Buffer solution, Primer+DNA (tap polymerase), and Nucleotides during the preparation step.
In the step of PCR sequence, there are three steps in this section.
Step 1 Denaturation
The addition of heat is needed to separate the two strands of the DNA molecule.
Step 2 Annealing
Temperature, is going to be cool in this step, should allow the primers to bind to the specific segments.
Step 3 DNA Synthesis
To make more copies of the DNA.
Those three steps above keep repeating to make enough copies of the DNA fragments. It is the principle of how PCR machine works.
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