T/YNRZ 001-2026 Active Group standards

T/YNRZ 001-2026 Technical code of practice for maize-soybean“2//3” strip intercropping

Publish Date: 2026-01-16 Implement Date: 2026-01-31 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/YNRZ 001-2026

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Technical management

ICS Name: Plant cultivation

Publish Date: 2026-01-16

Implement Date: 2026-01-31

Scope

1 Terms and Definitions The following terms and definitions apply to this document. 1.1 Corn-Soybean "2//3" Strip Intercropping A strip-intercropping model of corn and soybeans. It adopts a 2-row corn strip and a 3-row soybean strip for intercropping, integrating the growth habits and spatial requirements of corn and soybeans to meet the needs of both crops for sunlight and nutrients. 2 Variety Selection 2.1 Corn Select medium-short stem, high-yielding, stable-producing, high-quality, compact-type varieties with a leaf angle of less than 22° below the upper part of the ear, a height of 95 cm to 115 cm, a leaf area index of 4.6 to 6.0, and suitable for local planting of medium-early maturity varieties. The seeds must comply with the requirements of GB 4404.1. 2.2 Soybean Select varieties with compact growth, good resistance to shading and lodging, high yield, and 3 to 5 effective branches and 40 to 60 effective pods per plant, with a minimum of 50 seeds per pod and a yield of more than 10 g per plant. Suitable for local planting of medium-early maturity varieties. The seeds must comply with the requirements of GB 4404.2. 3 Site Selection and Tillage 3.1 Site Selection The soil should have good drainage, avoid low-lying areas prone to waterlogging, and avoid soil with poor permeability. The soil must comply with the requirements of GB 15618. 3.2 Tillage Remove debris from the site, plow the soil to a depth of >20 cm, and rake it finely. 4 Planting Distance 4.1 Wide-narrow row planting, with a strip width of 2.0 m. 4.2 Wide row (soybean strip): 60 cm wide, with 3 rows of soybeans planted at 30 cm intervals and 14 cm between plants, leaving double plants. 4.3 Narrow row (corn strip): 40 cm wide, with 2 rows of corn planted at 40 cm intervals and 12 cm between plants, leaving single or double plants. 4.4 Distance between soybean and corn strips: 50 cm. 5 Sowing 5.1 Timing Sowing generally ends in mid-to-late May. For those w