Into the August, the crab breeding can be said to be truly the most critical period. In the middle and late August, the crabs will undergo the last time the oyster shell - genital oyster shell, from the yellow crab into green crab, into the mature growth period, this stage is also in recen.......
1. In general, the sandblasting effect is mainly determined by the parts and materials and the sandblasting abrasive. Depending on the material of the part, the blasting abrasive range can range from strong metal abrasives to soft resi.......
The sowing technique of cotton should be carried out around the goal of seedlings, seedlings and seedlings. According to the actual cotton production in our province, the sowing technique of the live cotton field is introduced as follows:
Preparation before sowing: The seeds of cotton.......
First, symptomatic use of fertilizer. In order to promote the early development or increase the 1000-grain weight at the later stage, nitrogen fertilizer and phosphorus fertilizer can be sprayed; nitrogen fertilizer and potash fertilizer can be used to increase the leaf area and promote th.......
2. Site preparation: Deep plowing is.......
The suitable weaning time of piglets can be determined according to the specific conditions of the farm. Large-scale pig farms have generally adopted early weaning measures and breastfeeding takes 28 to 35 days. In general, it is best not to produce weaning earlier than 21 to 28 days of ag.......