Reading a Soil Test Report Against a Tight Budget
Ramesh Patil farms 4 hectares of rainfed land in Akola district, Maharashtra. His soil test report shows pH 5.4, organic carbon 0.32 per cent, available nitrogen 148 kg/ha (low), available phosphorus 14 kg/ha (medium), available potassium 310 kg/ha (high) and electrical conductivity 0.14 dS/m. Last kharif his soybean yielded 8 quintals per acre against the district average of 12, and he noticed termite damage in patches. His borewell runs for barely two hours a day and the June rains were 40 per cent below normal. He has ₹1.2 lakh in hand and a sanctioned Kisan Credit Card limit of ₹1.5 lakh, of which ₹40,000 is unutilised. He plans soybean again on the same plots, followed by chickpea in rabi, and wants to know before sowing whether to buy DAP, MOP, lime and a seed-treatment insecticide now or to postpone part of the spending to rabi.
1. Using the soil test values, set out the kharif soybean nutrient and amendment plan, and name the products you would deliberately not buy this season, with reasons.
Read the worked answer
Read the report as a set of limits, not a shopping list.
- pH 5.4 is the binding constraint. Below about 6.0, phosphorus is fixed by iron and aluminium, molybdenum availability falls and rhizobial nodulation suffers. Lime comes first; a lime-requirement test fixes the dose, and at this pH a common recommendation is roughly 2 t/ha of agricultural lime broadcast and incorporated three to four weeks before sowing so it can react before roots arrive. With ₹1.2 lakh in hand, lime the two worst patches properly rather than spreading a thin dose over 4 ha.
- Organic carbon 0.32 per cent is low, so 5 t/ha of well-rotted FYM or vermicompost fortified with Trichoderma returns more than extra urea and also works against termites.
- N low, P medium, K high: a basal dose giving about 30 kg N and 60 kg P₂O₅ per hectare is enough for soybean. Prefer SSP here, because it also supplies sulphur and calcium to an acidic soil.
- Do not buy MOP. At 310 kg/ha available K, potash is money burnt; soybean removal is small.
- Do not buy a granular soil insecticide yet. Confirm the termite patches first; a labelled seed treatment is far cheaper per hectare and protects the seedling exactly where the damage starts.
2. With two hours of borewell water a day and 40 per cent less June rain, would you let the full 4 ha of soybean stand? What operational changes do you order?
Read the worked answer
No - protect a smaller area properly rather than spread water over 4 ha. Soybean needs roughly 450–500 mm, and the two moisture-critical stages are flowering and pod fill; a single protective irrigation at each of those stages does more for yield than four light waterings spread thin. With about two hours of borewell a day, realistic supplemental irrigation covers only 1.5–2 ha, so concentrate on the better-drained, less acidic block.
Ordered changes:
- Sow on ridge and furrow so later rain is harvested in the furrows rather than running off; mulch the inter-row with crop residue.
- Use a short-duration variety for the balance area so the pod-fill stage does not drift into a dry September.
- Stagger sowing over two dates so one dry spell cannot take the whole crop.
- Enrol under PMFBY before the notified cutoff for the season - with 40 per cent deficit rain this is the cheapest risk transfer he has.
- Keep a contingency fodder or short-duration pulse seed ready for the patch that fails, rather than re-sowing soybean late.
3. How should the ₹40,000 unutilised KCC limit be used, and what would you hold back for rabi chickpea?
Read the worked answer
Priority order: seed treatment, then inputs, then hold a reserve - and keep lime out of the KCC spend.
- Seed treatment comes first. It costs a few hundred rupees per hectare, protects the plant stand, and has the highest return per rupee of anything on the list. Buy it now.
- Lime is a three-season investment, not a kharif input. KCC is a crop-production limit; a soil amendment whose benefit runs three years is better funded from a long-term or agri-investment loan. Advise him to apply for that separately rather than sink scarce working capital into it, or to lime only the worst patch from owned funds.
- Keep at least ₹15,000–20,000 of the limit unspent for chickpea. Chickpea is lower-water, fixes its own nitrogen and spreads his price and weather risk; exhausting the limit on a drought-stressed soybean crop leaves nothing for the rabi season, which is precisely when a cash shortfall would force him to a moneylender.
- Do not draw the whole limit merely because it is sanctioned. Interest accrues from drawal, and an unspent limit costs nothing.