In fact, everyone now uses this one-time fertilization approach to solve all the problems. Farmers are busy working away from home or doing business, so who still has the time and energy to worry about topdressing corn? Even if the elderly are more careful with the land and the grain, they have the will but not the strength.

According to the growth pattern of corn, the best approach is naturally to carry out reasonable topdressing according to the corn's growth cycle. Corn growers also say that topdressing according to the cycle can indeed achieve high yields.

Many friends who grow corn probably know the topdressing saying: "First topdressing at a chi or so tall, second topdressing at waist height, third topdressing when the silk just appears." This means that during the corn's growth period, topdressing is generally carried out three times, at the seedling stage, the large trumpet stage, and the early silking stage.

But friends who have grown corn know that growing corn is not easy. Especially in summer, the corn field is hot and prickly, making it very uncomfortable. Moreover, the remaining labor force in rural areas now consists mostly of elderly people. Most young people have gone out to work or do business to earn money, and the number of times they return home in a year can be counted on one hand. So few people still use such a complicated topdressing model. Everyone is happy to adopt the "one-shot" management model that solves all problems at once.

In fact, there is nothing wrong with adopting such a model. If you calculate it, the fertilizer used for topdressing one mu of land costs about 150 yuan. If one mu of land is not topdressed, the yield is reduced by about 7 or 8 percent, which is about 200 jin. These 200 jin, calculated at the current highest corn price rounded to 1 yuan, amount to 200 yuan.

Actually, when you calculate it this way, it is not worth it. Farmers growing that bit of grain tire themselves out and busy themselves for a day, only to earn this little extra money. Moreover, spreading fertilizer in a corn field in summer is very tiring work, and it is not as good as the money earned from a day of doing business or working away from home.

And no matter how well the land is managed, the harvest from the land is still uncertain. If the weather is poor today, your deep management efforts do not necessarily mean a high yield. So, living at the mercy of the weather, topdressing is really somewhat not worth it. Good techniques should be promoted, but farmers' actual circumstances must also be considered.

Now let us talk about the "one-shot" fertilization method. In fact, the one-shot fertilization method is not entirely without benefits. At the very least, it deserves recognition for saving labor. And in fact, if the fertilizer is chosen well, yield reduction can be avoided as much as possible.

Corn growers choose special compound fertilizer suitable for corn. It is not the ordinary three-element compound fertilizer, but controlled-release fertilizer specially for corn, and the effect is still quite good. Many corn controlled-release fertilizers are actually made to solve the problem that the one-shot fertilization method easily causes corn yield reduction.

However, when farmers buy chemical fertilizer, they must pay attention. Do not seek cheapness and do not listen to the of some unscrupulous merchants. Choose fertilizer produced by relatively trustworthy manufacturers, or choose fertilizer with a good reputation and an after-sales compensation mechanism. And when purchasing, choose fertilizer with bags in good packaging, less powdery material, uniform fertilizer granules, and good hardness. This kind of quality is generally better.

The above comes from Science Xingnong.