How to write a diary for observing garlic in the first book of the fourth grade is as follows:

1. Purpose and background of the observation: in the beginning of the diary, you can briefly introduce the purpose and background of observing garlic. For example: today, I started an interesting observation task - to observe the growing process of garlic. I chose garlic because it is a common vegetable with high nutritional value.

2. Observation method: you can introduce the observation method. For example, I chose four full-sized garlic cloves and planted them in four different soil environments - dry, moist, sandy and clay. I plan to measure and record the growth of each garlic plant daily for comparison and analysis.

3. Observations: In your journal, you can record the daily observations in detail. For example, on the first day, all four garlic seeds began to germinate, but at different growth rates. The garlic in the dry soil grew the slowest, while the garlic in the moist soil grew the fastest.

4. Analyze and think: While recording the observations, you can do some analysis and thinking. For example: through observation, I found that the growth rate of garlic has a great relationship with the humidity of the soil. In moist soil, the growth rate of garlic is obviously accelerated. This makes me realize that the growth of plants is closely related to environmental factors.

5. Conclusion and Suggestions: At the end of the diary, you can summarize the observations and put forward some conclusions and suggestions. For example: Through this observation, I realize that the growth process of garlic is affected by many factors such as soil moisture. In the future, I will pay more attention to the influence of environmental factors on plant growth when growing vegetables.

Related Knowledge of Garlic

1, Nutritional Value: Garlic is rich in protein, fat, carbohydrates, vitamins and minerals, and other nutrients, the most prominent of which is allicin, which is a strong antibacterial, antiviral, and anticancer effects. In addition, garlic also contains a variety of antioxidant substances that help remove free radicals from the body and slow down aging.

2, medicinal value: garlic has a variety of medicinal value, such as clearing away heat and detoxification, stomach and digestion, lowering blood pressure and fat. Eating garlic can enhance human immunity, reduce blood pressure, blood fat and blood sugar, prevent cardiovascular and cerebrovascular diseases and cancer. In addition, garlic can also be used to treat colds, coughs, dysentery and other diseases.

3, eating method: garlic can be eaten raw or cooked, can also be used as a seasoning. Raw garlic can retain the full nutrients and medicinal value, but some people may not be accustomed to the flavor of raw garlic. Cooked garlic can destroy the allicin in garlic, causing it to lose its antibacterial, antiviral and anticancer effects, but still retain other nutrients and medicinal value.

4, Note: Although garlic has many benefits, but not everyone is suitable for consumption. Some people may experience allergic reactions or gastrointestinal discomfort and other symptoms. In addition, excessive consumption of garlic may irritate the gastrointestinal tract, leading to diarrhea, abdominal pain and other symptoms. Therefore, you should consume garlic in moderation and pay attention to your personal constitution and reactions.

5, planting method: garlic planting method is relatively simple, need sufficient sunlight, water and fertilizer. In the planting process, you need to pay attention to timely sowing, reasonable dense planting, timely watering and fertilization and other links. At the same time, attention should also be paid to the control of pests and diseases to ensure the growth and yield of garlic.