Agronomy

Ongoing Projects

  1. Diversified maize based cropping systems for higher productivity and sustained soil health
  2. Nitrogen management under conservation agriculture in maize based cropping systems
  3. Site specific nutrient management in maize based cropping systems
  4. Evaluating Conservation Tillage Practices for Improving Resource Use Efficiency in Maize Based Cropping Systems

Achievements

  • Conservation agriculture in maize based cropping systems: The zero tillage technology for maize based cropping systems like maize-chickpea-Sesbania, maize-mustard-mungbean and maize-maize-Sesbania is the better option for enhancing productivity and profitability with better soil health and saving of energy. While, in maize-wheat-mungbean cropping system, permanent bed planting is better planting option compared to zero and conventional tillage.
  • Site-Specific nutrient management (SSNM): Site specific nutrient management practice in maize proved the best method of nutrient management in two major maize based cropping systems i.e. maize-wheat and rice-maize. The omission of N and P from SSNM practice considerably reduced the maize yield.
  • Nitrogen scheduling in maize: Nitrogen application in 5 splits (10% basal, 20% at V4, 30% at V8, 30% at tasseling, 10% at grain filling) resulted in significantly higher grain yield over recommended N scheduling (33% basal, 33% at V8, 34% at flowering). The agronomic efficiency of N (AEN) at different locations was 3-16% higher with 5 splits compared to 3 splits.
  • Agronomic management of excessive soil moisture stress: Split application of recommended dose of N (120 kg/ha) in maize as 25% at 15 days after planting, 50% at knee high stage and 25% of at tasseling stage was found the best treatment in reducing the stress injuries and losses due to excessive moisture stress at knee high stage.
  • Agronomic management of low temperature stress: The foliar spray of N (1% urea) +K (2% K2PO4) + Fe (200ppm) was the most effective treatment in improving cold tolerance in winter maize and ‘Buland’ is found as the tolerant cultivar.
  • Intercropping systems: To enhance the profitability of maize based cropping systems planting of three rows of black gram between paired rows of maize proved beneficial over sole maize. In the peri-urban areas, intercropping of high value crops viz. beet root and peas, potato in baby corn hybrid planted on raised beds was found remunerative as compared to sole baby corn crop.
  • Sequential Cropping: In winter maize based cropping systems for peri urban areas; maize-cowpea-baby corn closely followed by maize-cowpea-okra was noticed as the best sequence and these systems recorded 25-30 % higher maize cobs equivalents as compared to maize-maize cropping system.
  • Weed management strategies against complex weed flora in maize –wheat cropping system: Atrazine 1.0 kg a.i./ha pre emergence and Metribuzin 0.25 kg a.i./ha as pre emergence was the best treatment in respect of controlling weeds and yield enhancement . The non-herbicidal treatment i.e. maize + cover crop (Cow pea) also suppressed weed and improved yield significantly over weedy check. The residual effect of all the weed management treatments on wheat the highest yield was also noticed following maize + cowpea.
  • Agro techniques for inbred seed production: For producing higher seed yield from maize inbred, the crop should be planted at higher plant density planting (60 cm x 20 cm plant spacing) along with application higher doses of N, P2O5 and K2O (250:90:90) coupled with of 15 t/ha FYM.
  • Agro techniques for hybrid seed production: For seed production of maize hybrids (HQPM-1, HQPM-6, HQPM-7, HM-1602, HM-1604 and HM-4), the planting spacing of 60 cm x 15 cm with combined application of 250 N, 90P2O5 and 90 K2O kg/ha and of 15 t/ha FYM were the best practices. The ratio between female and male rows should be kept as either 3:1 or 4:1.