1. Intercropping wheat, corn and celery with medium-early-maturing varieties of wheat and corn, sowing wheat at the beginning of October and planting with Sanqiqi. In the 8-10 days before the wheat harvest, wheat was interplanted with summer corn, with a large row spacing of 100 cm, a small row spacing of 33 cm, a plant spacing of 20--22 cm and a mu 4300--4500 strain. In late June, fertilize the maize field and fertilize the celery by digging. The oysters should be weighed 60--70 cm wide and 5 to 10 cm high. The ditch should be ditched on both sides to facilitate irrigation and drainage. Seeds soaked before sowing to germination, after the dew whitening in early July selected sunny sowing, mu sowing volume of 1.5--2.5 kg, planted before pouring water pouring feet, in order to ensure uniform sowing, can be the same amount of sieved sand Mix the seed with a seed and spread it on a seedbed spread over the sifting soil. Then spread 1 - 2 cm of semolina after sowing, and keep the soil moist. After the rain, water it in time and drain it in case of heavy rain. In mid-July, the seedlings will be seedlings, and when the height of celery is 30 centimeters in late August, the management of fertilizers and water will be strengthened, and the old leaves of the lower corn will be destroyed in order to facilitate ventilation and light transmission. Second, wheat, spinach, potato intercropping wheat, spinach at the same time sowing, harvested spinach at the Little Snow Festival; potatoes broadcast in the early spring the next year, wheat harvest before harvest; spinach winter storage, with the market listing, potato market than half a month ahead of ordinary film cultivation, can A substantial increase in efficiency. The wheat sowing form is planted with a row spacing of 10-7 cm and each line of wheat is sown with 40--50 cm of empty sowing spinach. Spinach selection of fast-growing red stick varieties, in late September and wheat sowing at the same period, that is, after sowing wheat, spread the spinach in large rows sow (seed must be soaked and germination), sowing depth of 2 cm, acres with species 2-- 3 kilograms, after sowing, flattening, practical and beneficial to emerge, and to grow, so as to facilitate fertilizer and watering. After the seedlings are poured, they are poured with water once, and the two seedlings are planted at a time of 6x7 cm square. The cold dew to the frost period combined with watering of Mushi 10-15 kg of urea and harvested on the snow season. When the soil freezes and disappears, it is shoveled with iron shovels and stored under the shovel and marketed along with the market conditions. At the beginning of March of the following year, the soil was thawed and covered with film. When the plough layer reached a temperature of 7-80C at a temperature of 10 cm, the potatoes were planted at a spacing of 20 cm, with a spacing of 15 cm, two rows per row, and water was sowed at the broken seat. In the end of April, topdressing and watering were carried out. In May, it was managed with wheat. Watering was stopped 7 days before harvest. Generally, it was harvested at the beginning of June. China Agricultural Network Editor
