First, build a room with soil. Choose irrigation conditions, fertile soil, sunny leeward, non-green onion, leeks, etc. to build a greenhouse. Cultivation beds are mainly framed beds and general seedbeds. Either way, you should first spread 3-4 cm thick garden soil on the bed surface. Use 5.......

When selecting cotton varieties, choose high-purity plots and pest-free cotton plants. Select the Piaotao at the center of the site and select the ripe “dried flowers”. Also note the following points:

Do not select hybrid cotton varieties. Under the current state of the.......

Scientific name Aphis sp. It belongs to the order Homoptera, Aphididae. Distributed throughout the country.

Host 枸杞.

The damage is an important pest in our country's production. The sap and sap sap from the clusters of Cheng and R.......

The method of applying fertilizer solution to the plant to obtain nutrient elements through the leaves is called foliar fertilization. For the purpose of absorbing the foliage, the nutrient required by the crop is directly applied to the foliar fertilizer, which is called foliar fertilizer.......

Symptoms mainly affect the leaves and stems, leaving white powder spots on both sides of the leaves and persisting. Primary amorphous patches, post-fusion, or near-survival, some disappear in later stages.

Pathogen Erysiphe biocellata Ehrenb. It is.......

Cabbage from the sowing to grow to 7 to 8 true leaves for the seedling period, the approximate time is 20 to 25 days. As the cabbage seedling stage is a season of high temperature and rain, there are many pests and the seedlings are susceptible to viral diseases. Therefore, strengthening s.......

Conveyors have a wide range of applications in production activities. Depending on the physical properties, chemical properties, shape and size of the objects to be transported, transportation routes, and transportation methods, the results of different transportation methods are different,.......

Daqing jujube is a winter jujube variety commonly cultivated in southern provinces in recent years. During the winter, mature harvesting, such as fruit ripening before harvesting, several times of foliar dressing, from the foliage to add nutrients, can make the fruit fully inflated and mat.......

Symptoms of plantain powdery mildew mainly damage the leaves. The mycelium is born on both sides of the leaf, forming white to contaminating white round spots, with large variations in size, sometimes merging with each other, causing lesions to become one piec.......

On the basis of balanced application of various elements, the correct application of nitrogen fertilizers is particularly important. At present, several nitrogen-containing fertilizers applied in production should pay attention to the following matters during application:

Ammonium .......

A single avoidance of single application of chemical fertilizer can only be applied to fertilizer field soil compaction, physical and chemical properties deteriorated, the level of field production is reduced, organic fertilizer and fertilizer should be applied together, the general organi.......

According to the law of tea production, relevant experts from the Provincial Agricultural Technology Promotion Center reminded tea farmers that it is necessary to do a good job of soil fertilizer management and pest control in winter tea gardens, which is crucial for improving spring tea p.......