Mixed and Multiple Cropping

Mixed and multiple cropping are two foundational categories of cropping system used to intensify land use and stabilise farm output, and they recur in the General Studies syllabus of the UPSC Civil Services Examination under agriculture (GS1 geography and GS3 economy). Both have deep roots in Indian subsistence agriculture, where smallholders historically planted complementary crops to hedge against monsoon failure, pest outbreaks, and price collapse. The Indian Council of Agricultural Research (ICAR) and the Food and Agriculture Organization (FAO) classify cropping systems by spatial and temporal arrangement, and these two terms occupy distinct positions: mixed cropping is defined by spatial coexistence within a single season, whereas multiple cropping is defined by temporal sequencing across a year. The Green Revolution of the late 1960s, the All India Coordinated Research Project on Cropping Systems (launched 1968), and subsequent National Food Security Mission programmes all built policy on these distinctions.

The mechanics of mixed cropping are straightforward: a cultivator sows seeds of two or more crops together in the same field, broadcasting or planting them without any defined row arrangement. The classic Indian combinations are wheat with gram (chickpea), groundnut with sunflower, sorghum (jowar) with pigeon pea (arhar/tur), and cotton with green gram. The component crops are chosen for differing maturity periods, rooting depths, and nutrient demands so that they exploit resources at different times and to different soil depths. A legume is frequently paired with a cereal because the legume fixes atmospheric nitrogen through Rhizobium symbiosis, partially fertilising the companion cereal. The primary objective is insurance: if one crop fails owing to drought, frost, or pest attack, the farmer still harvests the other, reducing the risk of total loss on a single plot.

Multiple cropping, by contrast, is organised in time. It encompasses several variants. Double cropping raises two crops in succession on the same land within one agricultural year — for instance rice in the kharif season followed by wheat in the rabi season across the Indo-Gangetic plain. Triple cropping raises three crops in a year, common in irrigated tracts of Punjab, Haryana, and West Bengal. Sequential cropping plants the second crop only after the first is harvested, while relay cropping sows the succeeding crop into the standing previous crop before it is harvested, saving turnaround time. A closely related practice, intercropping, grows two crops in a definite row ratio — such as 1:1 or 2:1 — and is distinguished from mixed cropping precisely by that geometric arrangement. Cropping intensity, the standard metric, is calculated as gross cropped area divided by net sown area, multiplied by 100; a value of 200 indicates the average field is cropped twice a year.

Contemporary Indian practice illustrates both systems. Punjab and Haryana sustain rice–wheat double cropping with cropping intensities above 185 per cent, a system the Commission for Agricultural Costs and Prices has repeatedly flagged for groundwater depletion. The ICAR–Indian Institute of Farming Systems Research at Modipuram, Meerut, coordinates national cropping-systems research. Schemes such as the Rashtriya Krishi Vikas Yojana and the National Food Security Mission, administered by the Ministry of Agriculture and Farmers Welfare, fund crop diversification away from water-intensive paddy toward pulses and oilseeds grown in mixed and intercropped stands. The Pradhan Mantri Krishi Sinchayee Yojana, launched in 2015, expands irrigation that underpins higher cropping intensity.

The distinctions among these adjacent concepts matter for examination answers. Mixed cropping has no row pattern and aims chiefly at risk insurance; intercropping has a defined row pattern and aims at yield advantage measured by the land equivalent ratio. Multiple cropping is a temporal concept concerned with the number of harvests per year, not with what shares a field at any moment. Crop rotation, a fourth term, is the planned sequence of different crops over several seasons or years on the same land to maintain soil fertility and break pest cycles — it overlaps with multiple cropping but is defined by the deliberate alternation of crop families rather than by the count of crops per year. Monocropping, the cultivation of a single crop, is the baseline against which all these intensification systems are contrasted.

Several controversies attend these systems. Intensive multiple cropping, particularly the rice–wheat rotation, has driven the water table in central Punjab down by more than half a metre per year in some blocks and contributed to the stubble-burning that worsens Delhi's winter air pollution. Mixed and mechanised harvesting are difficult to reconcile, since combine harvesters cannot easily separate intermingled crops, which has pushed commercial agriculture toward orderly intercropping or monocropping. The 2018 doubling-farmers'-income committee headed by Ashok Dalwai recommended diversified, water-efficient cropping systems, and the natural-farming and zero-budget movements have revived interest in multi-crop polycultures as climate-resilient alternatives.

For the working practitioner — whether a district agriculture officer, a policy researcher, or a civil-services aspirant — the operational value of these concepts lies in their precision. Confusing mixed cropping with intercropping, or multiple cropping with crop rotation, signals analytical imprecision in answer scripts and policy notes alike. The systems frame live debates over food security, groundwater sustainability, soil health under the Soil Health Card scheme, and the economics of minimum support prices. Mastery of the terminology allows a practitioner to read a cropping-intensity statistic, diagnose whether a region is over-extracting water, and recommend the appropriate diversification instrument with confidence.