Maximizing Yields with Intensive Irrigated Fodder Production Systems

When land is limited and livestock demand for green fodder is year-round, farmers cannot afford to leave their fields underutilized for even a single month. Intensive irrigated fodder production systems address exactly this challenge – by combining high-yielding crops, smart irrigation, and strategic cropping sequences, farmers can push their fields to deliver continuous, high-quality forage throughout the year. Understanding how these systems work – and which crops anchor them – can make the difference between a fodder surplus and a seasonal shortage.

What is an intensive irrigated fodder production system? 🔗

Fodder production systems are broadly classified into two types based on water availability: intensive irrigated systems and extensive rainfed systems. The intensive irrigated model is built around the principle of maximizing output from a fixed piece of land by ensuring water is always available when the crop needs it. Research from the Indian Grassland and Fodder Research Institute (IGFRI), Jhansi shows that when these systems are managed properly using modern soil and crop management techniques, they are capable of yielding 180 to 300 tonnes of green fodder per hectare per year – an output that would be impossible under rainfed conditions alone.

The defining feature of this system is not just irrigation, but the combination of irrigation with multiple cropping strategies – growing more than one crop in sequence or simultaneously on the same piece of land across all seasons. With sufficient irrigation water, triple and even quadruple cropping becomes possible when other climatic factors do not restrict growth. For dairy farmers, integrating fodder crops as a core component of this rotation ensures livestock always have access to fresh green feed.

Multiple cropping: the backbone of year-round fodder supply 🔗

Multiple cropping in an intensive irrigated system takes several forms, each suited to different farm sizes and forage goals. The most common approaches used in fodder production are sequential cropping, intercropping, and relay cropping.

Sequential cropping 🔗

In sequential cropping, one fodder crop follows another in a planned rotation so that land is never idle. A typical north zone rotation developed by IGFRI runs Maize + Cowpea in the kharif season, followed by Sorghum + Cowpea for two cuts, and then Berseem + Mustard through the rabi season. This sequence ensures fresh fodder availability across summer, post-monsoon, and winter periods. The crops are chosen not just for yield but for how they complement each other nutritionally and agronomically – alternating grasses with legumes, for instance, prevents soil nutrient depletion.

Intercropping 🔗

Intercropping involves growing two or more crops simultaneously in the same field, typically in a defined row arrangement. The primary goal of intercropping is higher productivity per unit area, along with more stable production and better resource utilization. In fodder systems, combining a high-biomass grass with a nitrogen-fixing legume is a particularly effective pairing. Studies show that intercropping Napier grass with cowpea significantly enhances overall growth and green fodder yield compared to sole Napier cultivation, with the legume contributing nitrogen to the soil while boosting the protein content of the harvested forage.

Relay cropping 🔗

Relay cropping introduces a second crop into the field before the first is harvested, overlapping the growth cycles to avoid any gap in production. ICAR demonstrations of relaying Berseem in mustard within a pearl millet-based cropping system showed that pearl millet and mustard productivity increased by 14-27% and 11-26% respectively, compared to fields without relay cropping. The Berseem residues improved soil organic carbon and macro- and micro-nutrient availability – making relay cropping a win for both productivity and soil health.

Key crops in intensive irrigated systems 🔗

Three crops form the core of most intensive irrigated fodder systems across South Asia: Berseem, Hybrid Napier, and Cowpea. Each occupies a distinct seasonal niche and brings specific agronomic advantages.

Berseem (Trifolium alexandrinum) – the winter anchor 🔗

Berseem, often called the “king of fodder crops” for irrigated conditions in northern India, is the dominant winter forage legume in this system. It yields between 44 and 71 tonnes per hectare of forage in a single growing season and contains around 17% crude protein, 25.9% crude fibre, and 60-65% total digestible nutrients (TDN) – making it a well-balanced diet for milch animals. Berseem has spread rapidly in recent decades, with cultivated area reaching 1.9 million hectares in India alone, a reflection of how well-suited it is to irrigated sub-tropical farming.

Under irrigation, Berseem is sown in October and delivers 5 to 6 cuttings from November through to May. On average, farmers can obtain around 550 quintals of green fodder per hectare across these cuttings, with improved varieties like BL-22 pushing yields to 750 quintals per hectare. The first cutting is ready about 60 days after sowing, with subsequent cuttings at 25-30 day intervals. Crucially, Berseem fixes substantial quantities of atmospheric nitrogen – enriching the soil for the following kharif crop and reducing the farm’s dependence on synthetic nitrogen fertilizers.

Hybrid Napier – the perennial summer pillar 🔗

While Berseem covers winter and spring, Hybrid Napier grass (a cross between Pennisetum purpureum and Pennisetum glaucum) fills the critical summer gap. Hybrid Napier is a tall-growing, deep-rooted perennial grass distributed widely across tropical and subtropical regions of Asia, Africa, and India, and its perennial nature is one of its biggest practical advantages – once established, it can be retained productively on the same field for 3 to 4 years, eliminating the costs of repeated tillage and re-sowing that seasonal crops demand.

Under irrigated conditions, high-performing varieties like Hybrid Napier DHN-15 have recorded green fodder yields of 759 quintals per hectare, with crude protein content of around 10.71%. TNAU-developed Cumbu Napier varieties such as CO (CN) 4 and CO (BN) 5 yield between 360 and 400 tonnes of green fodder per hectare annually across 7 harvests, with CO (BN) 5 showing an especially favourable crude protein content of 14%. The first cutting is typically taken 65-70 days after planting, with subsequent cuts every 35-40 days.

Cowpea (Vigna unguiculata) – the summer legume 🔗

Cowpea plays a dual role in the intensive irrigated system: it is both a high-quality forage crop in its own right and an intercrop partner that improves the nutritional balance and soil fertility of the whole system. Cowpea can be grown throughout the year in tropical and subtropical conditions, with the first harvest ready 45-50 days from sowing, making it one of the fastest-cycling forage legumes available. It is particularly valued for its high protein content, which compensates for the relatively lower protein levels in grass-based forages like Napier.

When intercropped with Hybrid Napier, Cowpea delivers measurable agronomic benefits beyond forage yield. Sequential cropping systems that include a preceding pulse or legume crop can add between 18 and 70 kg of nitrogen per hectare to the soil, reducing fertilizer needs by 25-30%. This nitrogen contribution helps sustain the productivity of the subsequent crop without drawing down soil fertility.

The IGFRI year-round forage system 🔗

One of the most refined practical expressions of the intensive irrigated system is the year-round forage production model developed at IGFRI, Jhansi. This model involves raising Berseem in winter, interplanting it with Hybrid Napier in spring, and then intercropping the inter-row spaces of the Napier with Cowpea during summer after the final Berseem harvest. The result is a system in which at least one crop is always in a productive phase, delivering 9 to 10 cuts per year from the same plot of land. The perennial Napier provides a structural canopy while the annual legumes cycle through the understory, making maximum use of both space and light.

This system was found to be superior to conventional multiple crop sequences in both total forage production and economic returns. Among perennial fodder grasses evaluated in cropping module studies, Hybrid Napier produced the highest system productivity along with the best net returns and benefit-to-cost ratio. Farmers with access to reliable irrigation can adapt this model by substituting crops based on regional suitability – Setaria or Guinea grass can replace Hybrid Napier, and Lucerne can stand in for Berseem in areas where climate permits.

Irrigation management and soil sustainability 🔗

The intensive system lives and dies by irrigation management. Over-irrigation wastes water and risks waterlogging; under-irrigation limits the vegetative growth that defines high-quality forage. The optimum soil moisture regime for key fodder crops – including Berseem, Maize, Sorghum, Hybrid Napier, and Cowpea – has been found to be 75% of available soil moisture (ASM), a benchmark that guides irrigation scheduling across all stages of crop growth. For Berseem specifically, irrigation immediately after each cutting is essential to support regeneration and ensure the next flush of growth.

Soil productivity is maintained in intensive irrigated systems through a combination of crop rotation, legume inclusion, and organic matter management. In well-designed crop-livestock integrated systems, expenditure is significantly reduced because fodder grown on the farm is fed directly to animals, and waste from animals is recycled as vermicompost to fertilize the fodder crops – creating a closed-loop that improves soil health and reduces input costs over time. Practices like including Berseem in the rotation not only fix nitrogen but also improve the physical and biological properties of the soil, with crop rotation designed so that exhaustive crops are followed by restorative ones, maintaining a long-term productive balance.

Economic and practical benefits for farmers 🔗

The economic case for intensive irrigated fodder production is straightforward. By producing their own high-quality green fodder year-round, dairy farmers reduce their dependence on purchased feed – one of the largest recurring costs in livestock farming. Higher forage yield per unit area also means that even farmers with small landholdings can meet their herd’s nutritional requirements without expanding their land base. Expenditure in integrated farming systems is reduced primarily because on-farm fodder production directly lowers feed costs, while improved soil health from legume inclusion and organic recycling enhances the land’s long-term productivity. For smallholders with access to canal or groundwater irrigation, relay cropping of Berseem within existing cropping systems represents a highly profitable proposition that improves both income and soil fertility simultaneously.

What do you think? Given the growing pressure on land and water resources, which crop combination in an intensive irrigated system do you think offers the best balance of yield, soil health, and water efficiency for small dairy farmers? And as climatic variability increases, how should farmers adapt their seasonal cropping sequences to keep green fodder supply stable throughout the year?

References

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