Where did Khrushchev plant corn for reclamation? The best place! ! thank you

In the late 1950s and early 1960s, when Khrushchev was the general secretary of the Soviet Union, the grain in the former Soviet Union was relatively tight, and he decided to open up a large area of land to solve the grain problem. He took a fancy to the vast wasteland grasslands in eastern Russia, northern Kazakhstan and western Spoglia. So from 1954, hundreds of thousands of enthusiastic pioneers were mobilized, and in five years, a farmland larger than Britain was reclaimed, covering an area of 40 million hectares. This is also a pioneering work in the history of world reclamation! In the first few years, these virgin lands did produce a lot of grain, which increased the total grain output of the Soviet Union by 50% compared with the past. However, it didn't take long for problems to arise. Due to the lack of vegetation protection, the soil on these newly reclaimed arid grasslands is easily blown away by the wind. At 1960, the small drought and yellow wind on the newly-opened land finally developed into the big drought and rhubarb wind. The strong wind came and blew away the dehydrated broken topsoil, and the precious and fertile topsoil suffered heavy losses. Don't say you can't sow, even if you sow seeds in the ground, it's no use throwing them away. At that time, the land seriously damaged by wind erosion was170,000 hectares, of which 4 million hectares were not harvested. At 1963, the storm is getting worse. In Kazakhstan, the affected area is 20 million hectares, and a lot of land is covered with sand. In Central Asia and West Asia, strong winds not only destroyed newly cultivated farmland, but also caused some original cultivated land to be affected, and the affected area reached 45 million hectares, which was larger than all cultivated land in the European part of the Soviet Union. At this point, the reclamation plan failed. Khrushchev's reclamation plan only got a little food, but lost the permanent grassland. The picture can't come up, please accept it. Thank you.