Irrigated: apply 20 kg N, 80 kg P2O5, 40 kg K2O and 40 kg S (as 220 kg gypsum) per hectare as basal; if the soil is deficient, also 25 kg ZnSO4 and 25 kg MnSO4 per hectare. Rainfed (if soil test is not available and moisture is adequate): 20:40:20:20 kg NPKS per hectare, all basal. A spray of DAP or urea at 20 g per litre at flowering and again 15 days later is listed.
Pending expert review
Source
Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Soyabean – Fertilizer application (irrigated, p. 175; rainfed, p. 176)
Region
Tamil Nadu
Last updated
2026-11-04
Irrigation
Irrigate immediately after sowing and give a life irrigation on the 3rd day. Then irrigate every 7–10 days in summer and 10–15 days in winter, depending on soil and weather. Avoid water stagnation, and do not let the crop suffer water stress from flowering to maturity. To relieve moisture stress, spray kaolin 3% or liquid paraffin 1% on the leaves.
Pending expert review
Source
Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Soyabean – Water management, p. 175
Region
Tamil Nadu
Last updated
2026-11-04
Weed control by hand
If no herbicide is used, give two hand weedings, on the 20th and 35th day after sowing.
Pending expert review
Source
Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Soyabean – Weed management (ii), p. 175
Region
Tamil Nadu
Last updated
2026-11-04
Pre-emergence herbicide
Apply pendimethalin at 1.0 litre per hectare after sowing, followed by one hand weeding 30 days after sowing.
Follow the instructions on the product label. Consult your local Agriculture Officer before use.
Pending expert review
Source
Crop Production Guide – Agriculture 2020 (Directorate of Agriculture, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Soyabean – Weed management (i), p. 175
