What should I do if seedlings are burned after fertilization?
Fertilizer burn is usually caused by excessive application of fertilizer or fertilizer being applied too close to the seeds or roots. Remedial measures include:
1. Irrigating appropriately to dilute the fertilizer concentration in the soil.
2. Removing severely affected plants and replanting promptly.
3. In severe cases, consider tilling and replanting.
Prevention measures: Separate seeds from fertilizer, apply fertilizer in small amounts frequently, and control the amount applied.
What are the safety precautions for fertilization?
1. Wear gloves, masks, and other protective equipment to avoid direct contact with skin and respiratory tract;
2. Do not fertilize during high-temperature periods (midday) to prevent fertilizer volatilization and crop burn;
3. In case of accidental ingestion: Induce vomiting immediately and seek medical attention, carrying the fertilizer packaging instructions.
What are some simple methods to distinguish genuine fertilizer from counterfeit fertilizer?
Look: Observe the fertilizer's shape and color to see if they are normal.
Touch: Urea is smooth, loose, and doesn't feel damp; counterfeit urea feels burning and prickly to the touch.
Smell: Ammonium bicarbonate has a strong, pungent ammonia odor; superphosphate has an acidic smell.
Soluble: Stir the fertilizer in water. High-quality compound fertilizers are highly water-soluble. Urea will cause a significant drop in water temperature when it dissolves.
Burn: Place the fertilizer on a red-hot iron sheet and observe: Urea will melt quickly and produce white smoke; ammonium bicarbonate will decompose directly, producing a large amount of white smoke.
What are some things to keep in mind when purchasing compound fertilize
Check the appearance: Particles should be uniform in size and free of clumps or dust.
Avoid "double chloride": Avoid using compound fertilizers made from ammonium chloride and potassium chloride year-round to prevent soil salinization caused by chlorine.
Matching process: Spray granulation fertilizer (long-lasting effect) is suitable as a base fertilizer, while high-tower granulated fertilizer (good water solubility) is suitable as a top dressing.
Are more expensive fertilizers always better?
Not necessarily. When choosing fertilizers, the principle of "best value for money" should be followed. Expensive fertilizers may contain special additives or use special processes (such as controlled release), but the key is whether their effectiveness matches the needs of your crop and soil. Sometimes, choosing a qualified, well-formulated, ordinary brand fertilizer may be more economical.
Does fertilizer clumping affect its effectiveness?
Slight clumping (can be crushed by hand): This is due to moisture absorption and does not affect nutrient content. It can be used normally after crushing.
Severe clumping (hard and unbreakable): This may be due to improper storage or product quality issues. It is recommended to contact the distributor for a return or exchange.
What is the shelf life of fertilizer products?
Unopened products: Under specified storage conditions, chemical fertilizers generally have a shelf life of 2-3 years, while organic fertilizers and microbial fertilizers have a shelf life of 1-2 years (please check the packaging label); Once opened: It is recommended to use within 3 months to avoid nutrient volatilization or microbial inactivation.
