Sweet Potato

Water

Rain falls about 5 irrigations (5 cm each) short in a normal year, so it's risky without water.

Needs about 460 mm of water here in its growing months. Rain in its months gives about 30 mm it can use in a normal year (10 mm in a dry one), and the soil holds about 190 mm from the monsoon at sowing.

Temperature

Grows best at 18–28 °C on average, and survives 10–38 °C.

Here, in its growing months (day / night):

• Oct 33 °C / 22 °C
• Nov 31 °C / 18 °C
• Dec 30 °C / 15 °C
• Jan 31 °C / 15 °C
• Feb 34 °C / 18 °C

Soil

Soil for Sweet Potato: 9 out of 10 (good).

Not in the score: zinc, iron, copper and manganese.

• The pH here suits it.
• Many fields here are short of nitrogen, which it needs a lot.

Likes pH 5.0–7.0.

Money

Yield: about 42 quintals an acre, the typical figure in your state (your district's own figure looked wrong).

Rain gives it too little of the water it needs, so there's no income figure on rain alone: grow it only with irrigation.

Mandi price at last season's harvest (February–March 2026): about ₹1,050 a quintal across mandis in your state.

Prices are usually best in September.

Typical costs are about ₹55,000 an acre: about half of what a usual harvest earns (2024–2026), as in farm cost surveys. They are spent whatever the harvest.