Yield Protocols — What Biology Can Change Between Sowing and Harvest
A cereal crop goes through six stage-windows from sowing to harvest. Each window has a biological intervention that, if applied correctly, returns measurably more than its cost. This protocol maps the six windows, the recommended biological input at each, the dose, the application mode, and what the trial data shows the intervention buys. Sequenced this way, the cereal cycle becomes a schedule, not a gamble.
Six windows, in sequence
Window 1 — Seed treatment (Day 0)
Input: MRIDAJ (Trichoderma viride 1% W.P) at 5 g/kg seed, slurry-coated. For nitrogen-fixing crops add VAYUPOSH (Azotobacter chroococcum 4% L) at 10 ml/kg seed.
What it buys: rhizosphere colonisation before the first true leaf — root-rot suppression, early-vigour boost, nitrogen availability in the first 21 DAS window. Yield uplift in trial data: 4–7 % over untreated check, assuming no other intervention.
Cost: ₹40–60 per acre. Single highest-return intervention in the cycle.
Window 2 — Early vegetative (15–25 DAS)
Input: HARANTRA (PSB) + KRISHANKUR (NPK consortia) at 1 L each per acre, soil drench with first irrigation.
What it buys: root zone microbial top-up at the moment seedling root systems are committing to depth. Phosphate solubilisation in this window saves 20–30 % of the recommended-dose SSP/DAP requirement. Field data: equivalent stand vigour at lower chemical input.
Window 3 — Active vegetative (30–45 DAS)
Input: JEEVANBAL (Moringa-extract biostimulant) foliar at 1 L per acre. Concurrent: VAJRANSH (Metarhizium) at 1 kg per acre if insect-pressure scout sheet trips threshold.
What it buys: stress priming. Plants treated with seaweed-amino-acid biostimulants at active vegetative stage demonstrably handle the subsequent flowering-stage thermal stress better — flowering panicle sterility reductions of 8–14 % under 40 °C+ conditions.
Window 4 — Panicle / booting (55–70 DAS for paddy; analogous for other cereals)
Input: TEJAJ (Pseudomonas fluorescens 2% A.S) foliar at 1 L per acre, evening application. KALVIR (Bacillus subtilis) for crops with documented sheath disease pressure.
What it buys: upper-canopy disease suppression and induced systemic resistance during the most vulnerable reproductive window. See Panicle Health and Grain Fill for the diagnostic walk-through that triggers this intervention.
Window 5 — Grain fill (80–100 DAS)
Input: NEERMIT (seaweed biostimulant) foliar at 1.5 L per acre. SOMAJ (Gibberellic acid 0.001%) optional, at specific stage-and-crop combinations.
What it buys: grain weight. Biostimulants applied at grain fill demonstrably increase test-weight of harvested grain by 6–11 % in trial data. The mechanism is twofold — maintained chlorophyll integrity in the flag leaf and modulated abscisic-acid signalling that slows premature leaf senescence.
Window 6 — Pre-harvest (100–115 DAS)
Input: BHOOMIRAS (Sargassum granular) soil broadcast at 5 kg per acre.
What it buys: post-harvest soil residue. The biology of the standing crop is heading toward senescence; the biology of the next crop's seedbed is being set up. Pre-harvest broadcast of granular biostimulants is, in trial data, the single most reliable predictor of the next season's establishment vigour.
What the sequence adds up to
Stacked across the six windows, the integrated biological protocol delivers, in our 2024-2025 trial data, a 14–22 % yield uplift over untreated check in cereal crops, at an integrated input cost of ₹2,400–3,200 per acre. Comparable chemical-only protection plus chemical fertilisation runs ₹3,800–5,500 per acre with equivalent or lower yield uplift, and carries the residue gate.
| Window | Crop stage | Headline product | Trial yield contribution |
|---|---|---|---|
| 1 | Seed treatment | MRIDAJ + VAYUPOSH | 4–7 % |
| 2 | Early vegetative | HARANTRA + KRISHANKUR | 2–4 % |
| 3 | Active vegetative | JEEVANBAL ± VAJRANSH | 2–4 % |
| 4 | Booting / panicle | TEJAJ ± KALVIR | 3–5 % |
| 5 | Grain fill | NEERMIT | 2–4 % |
| 6 | Pre-harvest | BHOOMIRAS | (next season set-up) |
What is not in this protocol — and why
You will notice the protocol does not include broad-spectrum chemical fungicides, synthetic pyrethroids, or systemic neonicotinoids. The omission is intentional, not ideological. The biology does not need them at the recommended doses to deliver the trial yield uplift. The protocol is not a "biology + chemistry" hybrid — it is the biological sequence, with chemistry retained only where the bio-substitute does not yet exist (see Chemical Gaps & Bio Fills).
You will also notice the protocol does not specify a single fixed calendar date for each window. Cereal stage timing varies by variety, region, sowing date, and weather. The DAS ranges are indicative. The trigger for each window is the crop's biological state, not the date on the calendar.
"The protocol is a schedule. The crop tells you when each entry on the schedule applies."