(1): Inefficient water and fertilizer management; many farmers believe that applying more fertilizer will lead to higher yields, which is incorrect. Fertilizer should be used according to the reasonable yield and formula of the planted crops. Pay attention to the coordinated use of macronutrients and micronutrients; most irrigation practices involve flooding with large amounts of water, which is detrimental to soil temperature protection and crop growth. Excessive watering can also lead to high indoor humidity and severe diseases. It is recommended to use small-volume film-mulched irrigation, and under certain conditions, drip and infiltration irrigation can be adopted.

(II): Excessive ridging in vegetable and fruit planting; farmers believe that higher ridges lead to less disease, but deep soil cultivation due to high ridging is not conducive to the root growth of crops with layered root systems. Too deep furrows can prevent shallow root systems from absorbing water and nutrients effectively during irrigation.

(3) Low ground temperature and high room temperature; as the old saying goes, "A robust plant starts with a robust root, and a robust root promotes lower temperature." The coordination of room and ground temperature is crucial for plant growth. Measures such as applying more organic fertilizer, using ground cover, and frequently performing shallow tillage can help improve this issue.

Section 4: Light cultivation, heavy re-planting conservation; many farmers believe that as long as they manage the diseases well, they can grow good vegetables in greenhouses. However, this is not enough. The main focus should be on enhancing cultivation management, such as cultivating robust seedlings and increasing light exposure.

Section 5: Severe re-sowing and root-knot nematode infestations are widespread; due to repeated planting of the same crops by farmers, there is severe re-sowing, resulting in reduced yields, lower quality, and severe diseases. The issue can now be addressed using anti-re-sowing bio-agents. For instance, the 'Re-sowing No.1' and 'Soil Phosphorus Activator' developed by Northeast Agricultural University have shown very significant effects. Applying more organic fertilizers and practicing proper crop rotation are effective solutions. Root-knot nematodes can be suppressed with biological agents, and in severe cases, the 'Freezing Greenhouse' method can be employed. This involves leaving a crop's bed empty during winter, flooding it with water, and removing the insulation cover to freeze the soil layer to a depth of 40 cm. This method is highly effective.