European primrose is also known as European primrose. Perennial herbs of the primroses of Primulaceae are often cultivated for one or two years. European primroses are clustered plants with a plant height of about 20 cm. Leaves basal, leaves 10-15 cm long, oblong, veins deeply concave. Lea.......

After the mating is completed, the farmers should arrange the nests for their production. The delivery room must be warm and durable in order to facilitate the mother's life and growth. To do this, we must carefully select the materials and arrange them carefully. We must not make any .......

Most of the low-yielding mulberry fields are caused by many shortages, old ages, fewer number of cultivars, poor varieties, and pests and diseases. The transformation of low-yielding mulberry fields is an important measure to increase mulberry leaf production and stabilize sericulture prod.......

In the Gaotian field in the middle and lower reaches of the Yangtze River, when early rice was harvested, it was often impossible to plant late rice due to inconvenient irrigation. However, if the rice-cucumber crop rotation is implemented, the output value of 3500-4000 yuan and net profit.......

First, the preparation of basin soil. Clivia vulgaris is a fleshy root, requiring loose, fertile, well-drained soil, and it grows best in slightly acidic (pH 6.2-6.7) soils. The mixture of decomposed chicken manure and pond mud can be mixed in 4:6, preferably in the ratio of 5:3:2 with pin.......

When the “three highs” became people’s familiar words, when polished rice and flour flourishes people’s appetite again, the urban people began to return to the truth, and a wave of “melancholy” eating coarse grains was created.

It is understood.......

When the material is liquid, in order to classify and filter, first consider 450 filter screen. The main working characteristics of this series of vibrating screen are:

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